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  • 1.
    Andersson, Mike
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten. University of Oulu, Finland, SenSiC AB, Kista, Sweden .
    Bastuck, Manuel
    Saarland University, Lab for Measurement Technology, Germany.
    Huotari, Joni
    University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten. University of Oulu, Finland.
    Lappalainen, Jyrki
    University of Oulu, Finland.
    Schuetze, Andreas
    Saarland University, Germany.
    Puglisi, Donatella
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    SiC-FET sensors for selective and quantitative detection of VOCs down to ppb level2016Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 168, s. 216-220Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    With the increased interest in development of cheap, simple means for indoor air quality monitoring, and specifically in relation to certain well-known pollutant substances with adverse health effects even at very low concentrations, such as different Volatile Organic Compounds (VOCs), this contribution aims at providing an overview of the development status of the silicon carbide field effect transistor (SiC FET) based sensor platform for ppb level detection of VOCs. Optimizing the transducer design, the gas-sensitive material(s) composition, structure and processing, its mode of operation - applying temperature cycled operation in conjunction with multivariate data evaluation - and long-term performance it has been possible to demonstrate promising resultsregarding the sensor technology’s ability to achieve both single-digit ppb sensitivity towards e.g. naphthalene as well as selective detection of individual substances in a mixture of different VOCs.

  • 2.
    Azizoğlu, Yağız
    et al.
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.
    Gärdsback, Mattias
    Sandvik Materials Technology, R&D, Sandviken.
    Sjöberg, Bengt
    Sandvik Materials Technology, R&D, Sandviken.
    Lindgren, Lars-Erik
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.
    Finite Element Analysis of cold pilgering using elastic roll dies2017Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 207, s. 2370-2375Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A finite element model of cold pilgering with elastic roll dies have been developed and used to investigate the influence of roll die deformation on the material flow, contact region, roll separating force and tube dimensions. Full scale experiments were performed to validate the contact surface and tube dimensions. The results show that the influence of roll die flattening is not significant on the contact length. However, elastic deformation of roll die has strong influence on both the wall thickness reduction and roll separating force. Thus it is recommended to consider elasticity of roll dies when forces and tube dimensions are estimated.

  • 3.
    Bernard, Thomas
    et al.
    Fraunhofer IOSB, Germany.
    Moßgraber, Jürgen
    Fraunhofer IOSB, Germany.
    Madar, Anna Elinge
    ARTTIC, France.
    Rosenberg, Aharon
    Hagihon Ltd, Israel.
    Deuerlein, Jochen
    3S Consult GmbH, Germany.
    Lucas, Helena
    Aguas do Algarve SA, Portugal.
    Boudergui, Karim
    CEA Alternative Energies and Atomic Energy Commission, France.
    Ilver, Dag
    RISE., Swedish ICT, Acreo.
    Brill, Eyal
    Decision Makers Ltd, Israel.
    Ulitzur, Nirit
    BioMonitech Ltd, Israel.
    SAFEWATER - Innovative tools for the detection and mitigation of CBRN related contamination events of drinking water2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 119, s. 352-359Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The safety and or security of drinking water can be threatened by natural disasters, accidents or malevolent attacks. The European FP7 project SAFEWATER aims at developing a comprehensive event detection and event management solution for drinking water security management and mitigation against major deliberate, accidental or natural CBRN related contaminations. New cost-effective C, B, and RN sensors will be developed. An innovative concept with a broad network of low-cost sensors - "domestic sensors" (complementary to a set of sensors in strategic locations) will be developed. A technology platform will be provide which is able to capture and analyze the data collected by the sensors and from other information systems and give a full overview of the crisis to the responders by means of online look-ahead simulations to efficiently manage potential crises. For testing the SAFEWATER solution it will be integrated with on utility-partners' information systems.

  • 4.
    Biel, Anders
    et al.
    Högskolan i Skövde, Institutionen för teknik och samhälle. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Stigh, Ulf
    Högskolan i Skövde, Institutionen för teknik och samhälle. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Damage and plasticity of adhesive layers: an experimental study2011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 10, s. 2280-2285Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Time independent inelasticity is often modelled as due to plasticity and/or damage. The difference is manifested at reversed loading; plasticity reveals itself by a remaining strain in the unloaded state while damage is revealed by a decrease in the elastic stiffness during unloading. With thin adhesive layers, the deformation is inhomogeneously distributed along the layer. Large deformations occur at the ends of the layer. In the more central parts, the layer is virtually undeformed. This makes a direct measurement of the unloading properties virtually impossible. In the present paper, novel experiments are performed in order to evaluate the inelastic properties of epoxy adhesives. The load is first increased to a level corresponding to 50, 60, 70 or 80% of the fracture energy. The load is then reversed. The first step creates a zone of inelastically deformed adhesive at the start of the layer. During a final loading phase, the properties of this zone are analysed. Major differences due to the loading direction are observed. Some comparisons with simulation models are performed.

  • 5.
    Carlsson, Daniel O
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.
    Nyström, Gustav
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.
    Ferraz, Natalia
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.
    Nyholm, Leif
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Oorganisk kemi.
    Mihranyan, Albert
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.
    Strømme, Maria
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Nanoteknologi och funktionella material.
    Development of nanocellulose/polypyrrole composites towards blood purification2012Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 44, s. 733-736Artikkel i tidsskrift (Fagfellevurdert)
  • 6.
    Chai, Guocai
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan. Sandvik Materials Technology, Sandviken, Sweden.
    Andersson, Marcus
    Sandvik Materials Technology, Sandviken, Sweden.
    Secondary Hardening Behavior in Super Duplex Stainless Steels during LCF in Dynamic Strain Ageing Regime2013Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 55, s. 123-127Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Cyclic deformation behaviors in five modified duplex stainless steel S32705 grades have been studied at 20 °C, 200 °C, 250° and 350 °C. The influence of temperature and nitrogen concentration on the occurrence of the second hardening phenomenon, in the stress response curve was focused. An increase in nitrogen concentration can have a positive effect on dynamic strain ageing by increasing the first hardening and also the second hardening behavior during cyclic deformation. Furthermore, an increase in nitrogen concentration in the super duplex stainless steel increases the fatigue life in the strain ageing temperature range. The occurrence of strain ageing in duplex stainless steel has greatly changed dislocation structures. The formation of irreversible dislocation structures and stacking faults can contribute to the formation of second hardening in the stress response curve.

  • 7.
    Chai, Guocai
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan. Sandvik Materials Technology, Sandviken, Sweden.
    Boström, Magnus
    Sandvik Materials Technology, Sandviken, Sweden.
    Olaison, Magnus
    Sandvik Materials Technology, Sandviken, Sweden.
    Forsberg, Urban
    Sandvik Materials Technology, Sandviken, Sweden.
    Creep and LCF Behaviors of Newly Developed Advanced Heat Resistant Austenitic Stainless Steel for A-USC2013Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 55, s. 232-239Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Austenitic stainless steel grade UNS S31035 (Sandvik Sanicro® 25) has been developed for use in super-heaters and reheaters in the next generation of A-USC power plants. This new grade shows very good resistances to steam oxidation and hot corrosion, and higher creep rupture strength than other austenitic stainless steels available today. This makes it an interesting alternative for super-heaters and reheaters in future high-efficient coal fired boilers. This paper will mainly focus on the study of the creep and LCF behavior of the material at temperatures from 600 °C to 750 °C by using TEM and ECCI. The mechanisms at different temperatures and loading conditions have been identified. The interactions between dislocations and precipitates and their contribution to the creep rupture strength have been discussed. In this paper, different models have been used to evaluate the long-term creep behavior of the grade. A creep rupture strength near 100 MPa at 700 °C for 100 000 h has been predicted.

  • 8.
    Chen, Lan
    et al.
    School of Amopheric Sciences, Sun Yat-sen University, HaiZhu, Guangzhou, China.
    Hang, Jian
    School of Amopheric Sciences, Sun Yat-sen University, HaiZhu, Guangzhou, China.
    Sandberg, Mats
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Energisystem.
    Claesson, Leif
    Högskolan i Gävle, Akademin för teknik och miljö, BMG-labbet.
    Di Sabatino, Silvana
    Department of Physics and Astronomy - DIFA, ALMA MATER STUDIORUM - University of Bologna, Bologna, Italy.
    The Influence of Building Packing Densities on Flow Adjustment and City Breathability in Urban-like Geometries2017Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 198, s. 758-769Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    City breathability refers to the air exchange process between the flows above and within urban canopy layers (UCL) and that of in-canopy flow, measuring the potential of wind to remove and dilute pollutants, heat and other scalars in a city. Bulk flow parameters such as in-canopy velocity (Uc) and exchange velocity (UE) have been applied to evaluate the city breathability. Both wind tunnel experiments and computational fluid dynamics (CFD) simulations were used to study the flow adjustment and the variation of city breathability through urban-like models with different building packing densities. We experimentally studied some 25-row and 15-column aligned cubic building arrays (the building width B=72 mm and building heights H=B) in a closed-circuit boundary layer wind tunnel. Effect of building packing densities (λp=λf=0.11, 0.25, 0.44) on flow adjustment and drag force of each buildings were measured. Wind tunnel data show that wind speed decreases quickly through building arrays due to strong building drag. The first upstream building induces the strongest flow resistance. The flow adjustment length varies slightly with building packing densities. Larger building packing density produces lower drag force by individual buildings and attains smaller velocity in urban canopy layers, which causes weaker city breathability capacity. In CFD simulations, we performed seven test cases with various building packing densities of λp=λf=0.0625, 0.11, 0.25, 0.36, 0.44 and 0.56. In the cases of λp=λf=0.11, 0.25, 0.44, the simulated profiles of velocity and drag force agree with experiment data well. We computed Uc and UE, which represent horizontal and vertical ventilation capacity respectively. The inlet velocity at 2.5 times building height in the upstream free flow is defined as the reference velocity Uref. Results show that UE/Uref changes slightly (1.1% to 0.7%) but Uc/Uref significantly decreases from 0.4 to 0.1 as building packing densities rise from 0.0625 to 0.56. Although UE is induced by both mean flows and turbulent momentum flux across the top surface of urban canopy, vertical turbulent diffusion is found to contribute mostly to UE.

  • 9.
    Eriksson, Mats
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Kemiska och optiska sensorsystem. Linköpings universitet, Tekniska fakulteten.
    Lindgren, David
    Linköpings universitet, Institutionen för systemteknik, Reglerteknik. Linköpings universitet, Tekniska fakulteten.
    Bjorklund, Robert
    Linköpings universitet, Institutionen för fysik, kemi och biologi.
    Winquist, Fredrik
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Biosensorer och bioelektronik. Linköpings universitet, Tekniska fakulteten.
    Sundgren, Hans
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Kemiska och optiska sensorsystem. Linköpings universitet, Tekniska fakulteten.
    Lundström, Ingemar
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Biosensorer och bioelektronik. Linköpings universitet, Tekniska fakulteten.
    Drinking water monitoring with voltammetric sensors2011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 25, s. 1165-1168Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Pulsed voltammetry has been applied to drinking water monitoring. This non-selective technique facilitates detection of several different threats to the drinking water. A multivariate algorithm shows that anomaly detection is possible with a minimum of false alarms. Multivariate analysis can also be used to classify different types of substances added to the drinking water. Low concentrations of sewage water contaminating the drinking water can be detected. A network of such sensors is envisaged to facilitate real-time and on-line monitoring of drinking water distribution networks.

  • 10.
    Eriksson, Robert
    et al.
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial.
    Brodin, Håkan
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial.
    Johansson, Sten
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Östergren, Lars
    Volvo Aero Corporation, Trollhättan.
    Li, Xin-Hai
    Siemens, Industrial Turbomachinery AB, Finspång.
    Fractographic Study of Adhesion Tested Thermal Barrier Coatings Subjected to Isothermal and Cyclic Heat Treatments2011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 10, s. 195-200Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Thermal barrier coatings (TBC) are used in gas turbines to protect metallic components from high temperature. In the present study adhesion tests have been conducted on APS TBC coated specimens subjected to different heat treatments. Isothermal and cyclic heat treatments have been conducted at temperatures around 1100 °C and the adhesion have been tested using the method described in ASTM C633. The fracture surfaces resulting from the adhesion test have been investigated and the fracture behavior has been characterized. A difference in fracture mechanism between the three heat treatments has been found. The two cyclic heat treatments give fracture in the top coat/bond coat interface while isothermal heat treatment gives fracture in the top coat.

  • 11.
    Galstyan, V.
    et al.
    CNR IDASC SENSOR Lab.
    Comini, E.
    CNR IDASC SENSOR Lab.
    Faglia, G.
    CNR IDASC SENSOR Lab.
    Vomiero, Alberto
    CNR-IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali.
    Brisotto, M.
    INSTM and Chemistry for Technologies Laboratory.
    Bontempi, E.
    INSTM and Chemistry for Technologies Laboratory.
    Sberveglieri, G.
    CNR IDASC SENSOR Lab.
    Fabrication of TiO 2 and TiO 2 nanotubular arrays and their gas sensing properties2011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 25, s. 757-760Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Pure TiO 2 and TiO 2 nanotubular arrays were successfully sensitized. Nanotubular arrays were prepared by electrochemical anodization of thin films of Ti and of Ti-Nb deposited on alumina substrates with two different roughness. Morphological characterization and functional properties are presented. The gas sensing properties of TiO 2 and TiO 2 nanotubes with different gases have been tested in a wide range of operating temperatures. © 2011 Published by Elsevier Ltd.

  • 12.
    Girhammar, Ulf Arne
    et al.
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
    Källsner, Bo
    Department of Building Technology, Linnaeus University.
    Horizontal Stabilisation of Sheathed Timber Frame Structures Using Plastic Design Methods – Introducing a Handbook: Part 1: Design Principles for Horizontal Stabilisation2016Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 161, s. 618-627Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The authors have developed a plastic design method for sheathed timber frame shear walls. It has been presented and discussed for inclusion in Eurocode 5 and a Swedish handbook has been presented. In the plastic method, you can choose to transfer the anchoring force via the leading stud to the substrate, corresponding to a fully anchored shear wall (no uplift of studs), but you can also choose to utilize the sheathings to transfer the tensile force via the sheathing-to-framing joints to the substrate by anchoring the bottom rail, corresponding to a partially anchored shear wall (studs experience uplift). By the plastic method several alternatives for anchoring the wall are possible and they can also be combined in such a way that each of them take a portion of the uplifting force, e.g. through a simple tying down device, through the sheathing-to-framing joints and through anchoring of the shear wall to the transverse wall. The method also makes it possible to include the load-bearing capacity of wall segments including openings. The handbook treats primarily shear walls, but for the sake of completeness some aspects of the roof and floor diaphragms are also discussed. The interior force distribution in sheathed timber frame walls weak in shear is discussed, as are the fundamental difference between the effect of vertical loads on the stabilisation of walls which are rigid or weak in shear, and how the plastic design method is applied to multi-storey timber buildings

  • 13.
    Girhammar, Ulf Arne
    et al.
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
    Källsner, Bo
    Department of Building Technology, Linnaeus University.
    Horizontal Stabilisation of Sheathed Timber Frame Structures Using Plastic Design Methods – Introducing a Handbook: Part 2: Design of Joints and Anchoring Devices2016Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 161, s. 628-635Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this part 2, the practical design and strength of a number of different joints is described: (1) Sheathing-to-framing joints – the plastic design method is based on the premise that the load-displacement relationship of the sheathing-to-framing joints has sufficiently large plastic deformation capacity; the sheathing-to-framing joints have great influence on the load-carrying capacity of the wall; (2) Stud-to-rail joints – by utilizing the shear capacity of the stud-to-rail joints, the plastic design method can be simplified and the load-carrying capacity can be increased; (3) Hold down devices for the (leading) stud – the capacity of the tying down force of the hold down determines whether the shear wall will act as fully or partially anchored; tying down the shear walls by connecting them to the transverse walls leads to a 3-dimensioonal behaviour that is a very favourable for the load-carrying capacity and the stiffness of the shear wall; through transverse walls the anchoring of the leading stud can be reduced or eliminated (those types of transverse wall connections are not discussed in detail in this paper); and (4) Anchoring devices for the bottom rail – in partially anchored shear walls it is necessary that the bottom rail is anchored to the substrate against uplift. Characteristic values for the different types of joints are given. Also, joints between the panels in the walls, roofs and floors are described briefly.

  • 14.
    Girhammar, Ulf Arne
    et al.
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
    Källsner, Bo
    Department of Building Technology, Linnaeus University.
    Horizontal Stabilisation of Sheathed Timber Frame Structures Using Plastic Design Methods – Introducing a Handbook: Part 3: Basics of the Plastic Design Method2016Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 161, s. 636-644Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Design of shear walls has been a topic of major discussions to develop a common European code for design of timber structures. The main problem has been that shear walls are fastened to the substrate in different ways in different countries and that this fact must be reflected in the code. In this part the requirements are given that must be met for the ductile characteristics of the sheathing-to-framing joints in order for the plastic design method to be applicable. The method is based on the plastic lower bound theory. The fundamental prerequisites for the method are that the static equilibrium for the structure is fulfilled and that the sheathing-to-framing joints are ductile. What requirements that should be made on the mechanical properties of the joints for the plastic design methods to be applicable and the precaution measures to take to avoid brittle behaviour are discussed. The two main principles for anchoring of sheathed timber frame shear walls, fully and partially anchored, are illustrated showing the static behaviour of the walls and the force distribution in the framing members and the sheathings. In addition, a general description of the design in the serviceability limit state is given. For medium-rise and taller buildings the serviceability limit state needs to be taken into account. There are no specified criteria for deformations in the present code.

  • 15.
    Girhammar, Ulf Arne
    et al.
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
    Källsner, Bo
    Department of Building Technology, Linnaeus University.
    Horizontal Stabilisation of Sheathed Timber Frame Structures Using Plastic Design Methods – Introducing a Handbook: Part 4: Design in Ultimate Limit State2016Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 161, s. 645-654Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this part 4, the horizontal load-carrying capacity of fully and partially anchored sheathed timber frame walls subjected to arbitrary vertical loads is presented for different models. For fully anchored walls, the elastic method is summarised (for comparison reasons) and a corresponding simple plastic method is presented. For partially anchored walls, three different plastic methods are presented: (1) no contact forces between adjacent sheets occur; (2) contact forces between the sheets; and (3) contact forces between the sheets and also with stud-to-rail joints taken into account. All the proposed plastic models are based on plastic characteristics of the sheathing-to-framing joints and that a plastic lower bound method is used. The proposed models are simple and flexible and can be applied to different wall geometries, boundary conditions, loading configurations, and number of storeys. The developed plastic design methods for fully and partially anchored sheathed timber frame shear walls have been verified through extensive analytical and experimental studies. This part is the last one in a series introducing the handbook to the international community.

  • 16.
    Glad, Wiktoria
    Linköpings universitet, Institutionen för tema, Tema teknik och social förändring. Linköpings universitet, Filosofiska fakulteten.
    Everyday governance of energy systems2017Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 180, s. 1612-1621Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The proposed transition to a low-carbon society faces challenges, as it is occurring too slowly to achieve the goals set by international and national governmental bodies, and gaps are found between available energy-efficiency technologies and their appropriate use. The governance of domestic energy systems has attracted European research attention, and the findings illustrate how materials, competence, and meaning influence energy productivity in domestic settings and how accountability is enacted by connecting people and technologies. The present research cites Swedish examples of how energy efficiency has been improved by involving multiple local actors, such as consumers, energy utilities, property companies, and local governments. Examples are analysed through the lens of social change and mundane governance theory, illustrating how spaces and places often overlooked as too mundane to be considered in policy prove, when analysed in more detail, to be important for energy efficiency. The results indicate that “governance pairs” (e.g., “households/lighting” and “caretakers/heating systems”) are more or less successfully held together and influence accountability and governance possibilities. The present analyses demonstrate that, while governance is often portrayed in terms of causality, everyday practices involving governance pairs are messier and less predictable than anticipated. These results call for the upgrading of research into everyday life and for bottom–up approaches to energy studies. Accountability – crucial to closing the energy-efficiency gap and understood in the context of mundane governance – can advance our energy-efficiency thinking and action.

  • 17.
    Golling, Stefan
    et al.
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.
    Östlund, Rickard
    Gestamp HardTech.
    Bergman, Greger
    Gestamp HardTech.
    Åkerström, Paul
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.
    Oldenburg, Mats
    Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.
    Modelling of Plastic Deformation and Fracture in Hot Stamped Steel with Multi-Phase Microstructure2017Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 207, s. 687-692Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Hot stamping is an industrialized technique with the aim of improving material properties by heat treatment and forming of a component in a single production step. Within the field of hot stamping the method of tailored material properties evolved. Components with tailored material properties possess different mechanical properties in designated areas. The mechanical properties in a blank are modified by the formation of different microstructures. Martensite is a microstructure with high strength but low ductility, ferrite has lower strength but higher ductility. Using special tooling tough martensite and soft ferrite can be placed in adjacent sections in a blank. Between those sections a transition zone consisting of a mixed microstructure exists with mechanical properties between martensite and ferrite. Transition zones possess intermediate cooling rates, hence formation of bainite and composites of bainite and another phase can from.

    This paper presents an approach of modelling the complete process from austenitized blank to fracture. The method presented relies on the prediction of phases formed during cooling using an austenite decomposition model. In the course of ferrite formation the carbon content in the remaining austenite increases, the carbon content in austenite influences formation of additional daughter phases. The estimated phase composition is used in a homogenization scheme to predict the hardening of the material during plastic deformation. Fracture in the different microstructural phases is predicted using the strain decomposition provided by the homogenization and a fracture criteria. The homogenization scheme and the fracture criteria use measured data from single phase microstructures, i.e. ferrite, bainite and martensite.

    A heat treatment process for tensile test specimens is used to produce samples with different volume fractions of the microstructures ferrite, bainite and martensite. The pre-cut specimens are austenitized, ferrite is formed in a second furnace with lower temperature, bainite and martensite are formed by the use of a temperature controlled plane tool.

    Prediction of the phase content in mixed microstructures showed good agreement with microstructural characterization and therefore results can be used as input value for the homogenization. Comparing experimental and numerical results for a variety of different mixed microstructures good agreement in the prediction of hardening and fracture is found.

    It is concluded that the use of a homogenization method combined with a fracture model can be used to predict the mechanical response of mixed microstructures. The method described in the present work can be applied in the development of hot stamped components.

  • 18.
    Grahn, Sten
    et al.
    RISE - Research Institutes of Sweden, Material och produktion, IVF. Mälardalen University, Sweden.
    Gopinath, Varun
    Linköping University, Sweden.
    Wang, Xi Vincent
    KTH Royal Institute of Technology, Sweden.
    Johansen, Kerstin
    Linköping University, Sweden.
    Exploring a Model for Production System Design to Utilize Large Robots in Human-Robot Collaborative Assembly Cells2018Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 25, s. 612-619Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    It has been shown that large robots can be safely installed for human-robot collaborative assembly cells in experimental setups. It has also been found that these installations require demanding considerations of a significant number of layout and safety parameters. This indicates that successful commercial implementations will require a resource efficient model for production system design that anticipates utilization of large robots in collaborative settings. Experiences from experimental setups have been used to explore a basic model for such production system design, to stimulate a discussion regarding what model characteristics should be tested and validated in future research.

  • 19.
    Gustafsson, Andreas
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.
    Möller, Mikael
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.
    Experimental and Numerical Investigation of Ratcheting in Pressurized Equipment2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 130, s. 1233-1245Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    part of a project within the Swedish nuclear industry with the objective to investigate the performance of different constitutive models in ratchet simulation, an extensive experimental program has been conducted on pressurized tube specimens. In total 30 test specimens made of two different materials, 316L and P235, have been manufactured and tested. In order to determine material properties, monotonic tensile load and internal pressure experiments have been performed. The remaining test specimens have been used for ratcheting experiments. The experimental results show ratcheting in the hoop direction when the tube is subjected to certain combinations of internal pressure and cyclic axial strains. The higher the pressure is and the larger the strain ranges are, the higher the ratcheting response becomes. Measured ratcheting strains are compared to numerical simulations using different constitutive models. In this paper the interrelated models of Prager, Armstrong-Frederick and Chaboche are investigated. In addition to these, the Besseling model is investigated. Based on the result from this investigation, recommendations on how to conduct ratcheting simulation of pressurized equipment subjected to cyclic secondary loading are presented

  • 20.
    Gustafsson, David
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Moverare, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Johansson, Sten
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Hornqvist, Magnus
    Volvo Aero Corporation.
    Simonsson, Kjell
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Sjöström, Sören
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Sharifimajd, Babak
    Siemens Industrial Turbomachinery AB.
    Fatigue crack growth behaviour of Inconel 718 with high temperature hold times2010Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 2, nr 1, s. 1095-1104Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this work, fatigue crack growth measurements have been made on center-cracked tension specimens of Inconel 718, where the focus has been to observe the effect of high temperature hold times on the fatigue crack growth behaviour of the material. The material testing has been done at three different temperatures, namely 450 degrees C, 550 degrees C and 650 degrees C. All testing were done in an isothermal LCF context with a standard test method for measuring the fatigue crack growth rates.

  • 21.
    Gustafsson, David
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Moverare, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Simonsson, Kjell
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära.
    Johansson, Sten
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Hörnqvist, Magnus
    Volvo Aero Corporation, Trollhättan.
    Månsson, Tomas
    Volvo Aero Corporation, Trollhättan.
    Sjöström, Sören
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära.
    Fatigue Crack Growth behaviour of Inconel 718 - the Concept of a Damaged Zone Caused by High Temperature Hold Times2011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 10, s. 2821-2826Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Fatigue crack growth testing of Inconel 718 has been carried out at the temperatures 550 °C and 650 °C. The tests were conducted using a mix of hold times and pure cyclic loading, referred to as block tests. From the test results, the existence of an embrittled volume or damaged zone in the vicinity of the crack tip has been revealed. It has been found that the evolution of this damaged zone can be sufficiently well described using a power law function with an exponent n = 0.25.

  • 22.
    Haller, Martin
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.
    Stehn, Lars
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.
    Increasing the Accuracy of a Prefab Building Design Process Simulation Using Simulated Annealing2014Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 85, s. 214-221Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Monte-Carlo simulation analysis has been discussed in project management literature as tool for proactive scheduling and to gain better insights into projects which are characterized by a high level of complexity and uncertainty, such as the design phase of prefab building projects. The application of simulation as proactive scheduling tool in construction projects is hampered by limited accessibility of proper input data, though, because of long project duration, the often temporary organization and multidisciplinary nature of such projects. In this study we use simulated annealing to adjust parameters of a simulation model for which the simulation outcome is sensitive to data perturbation by making use of data from related parameters which is easier to estimate. The applicability of the approach was demonstrated on a real life project, the construction of a 1100 m2 residential building in Sweden. More precisely, we used Design Structure Matrix simulation, i.e. an activity network based Monte-Carlo simulation technique with which stochastic project evolution (deviations from the planned activity sequence due to unexpected iteration of sub-processes) can be simulated, to model the workflow of the design process of the observed project. Then, by means of the simulated annealing approach, we adjusted the rework probabilities (model parameter) such that the frequencies of executed activities in simulated activity sequences fitted the frequencies as observed in the real project. Adjusting input data by using prior knowledge of the dependencies of the project activities and cross analysis with related data that is easy to estimate would help to increase the accuracy of simulations when access to statistical data of the input variable in question is limited. The suggested approach is interesting for practitioners who work with standardized design processes (e.g. as part of standardized building systems) and continuous improvement

  • 23.
    Halonen, Niina
    et al.
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Kilpijärvi, Joni
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Sobocinski, Maciej
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Datta-Chaudhuri, Timir
    Laboratory for MicroTechnologies, Department of Mechanical Engineering and the Institute for Systems Research ,University of Maryland, Baltimore, USA.
    Hassinen, Antti
    Division of Cell Biology, Department of Biochemistry, University of Oulu, Finland.
    Prakash, S. B.
    Integrated Biomorphic Information System Laboratory, University of Maryland, Baltimore, USA.
    Möller, Peter
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Abshire, Pamela
    Integrated Biomorphic Information System Laboratory, University of Maryland, Baltimore, USA.
    Smela, Elisabeth
    Laboratory for MicroTechnologies, Department of Mechanical Engineering and the Institute for Systems Research, University of Maryland, Baltimore, USA.
    Kellokumpu, Sakari
    Division of Cell Biology, Department of Biochemistry, University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten. Univ Oulu, Oulu, Finland.
    Low temperature co-fired ceramic package for lab-on-CMOS applied in cell viability monitoring2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 120, s. 1079-1082Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Lab-on-CMOS chips (LOCMOS) are sophisticated miniaturized analysis tools based on integrated circuit (IC) microchips performing various laboratory functions. We have developed a low temperature co-fired ceramic (LTCC) package for a LOCMOS application regarding cytotoxicity assessment of nanomaterials. The LTCC packaged capacitance sensor chip is designed for long-term cell viability monitoring during nanoparticle exposure. The introduced LTCC package utilizes the flip chip bonding technique, and it is biocompatible as well as able to withstand the environmental conditions required to maintain mammalian cell culture directly on the surface of a complementary metal oxide semiconductor (CMOS) integrated circuit.

  • 24.
    Huotari, Joni
    et al.
    University of Oulu, Finland.
    Björklund, Robert
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Lappalainen, Jyrki
    University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Nanostructured Mixed Phase Vanadium Oxide Thin Films as Highly Sensitive Ammonia Sensing Material2014Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 87, s. 1035-1038Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Pulsed laser deposition was used to produce vanadium oxide thin films on oxidized silicon substrates. Structural characterization concluded that the films consisted of two phases, orthorombic V2O5 and triclinc V7O16. Thin films performance as conductometric gas sensors was tested and they were found to be sensitive to ammonia gas already at ppb-level concentrations. Also selectivity of NH3 to NO was high. The cross-sensitivity measurements between ammonia and NO showed that the responses to these gases can be discriminated from each other even at 20 ppm concentrations. This is promising result from selective catalytic reduction point of view.

  • 25.
    Huotari, Joni
    et al.
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Lappalainen, Jyrki
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Puustinen, Jarkko
    Microelectronics and Material Physics Laboratories, University of Oulu.
    Baur, Tobias
    Department of Mechatronics, Saarland University, Germany.
    Alepee, Christine
    SGX Sensortech SA, Switzerland.
    Haapalainen, Tomi
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Komulainen, Samuli
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Pylvänäinen, Juho
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten. Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Pulsed laser deposition of metal oxide nanoparticles, agglomerates, and nanotrees for chemical sensors2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 120, s. 1158-1161Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Pulsed laser deposition (PLD) was used to prepare WO3, ZnO-modified SnO2, and V2O5 nanostructures as gas sensing materials on top of commercial SGX Sensortech MEMS microheater platforms. The layers were formed of different types of nanostructures including nanoparticles, agglomerates, and nanotrees with fractal-like growth. Clear dependency between the deposition parameters, structural morphology, and gas sensing performance was found. The sensing materials were found to be sensitive to different types of gaseous species, so that WO3 and SnO2 had very good response up to 600% to 50 ppm NO, and V2O5 up to -35% to 20 ppm NH3, respectively.

  • 26.
    Hörnqvist, Magnus
    et al.
    Volvo Aero Corporation, Trollhättan, Sweden.
    Månsson, Tomas
    Volvo Aero Corporation, Trollhättan, Sweden.
    Gustafsson, David
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    High temperature fatigue crack growth in Alloy 718 - Effect of tensile hold times2011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 10, s. 147-152Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The present investigation aims to clarify the mechanisms behind hold-time fatigue crack growth in Alloy 718 by using well designed tests where the crack length is carefully monitored. The results indicate that there is a significant embrittlement in a zone ahead of the crack tip during the hold-time, which is cracked open on the next load reversal. This leads to a very large cyclic contribution to the total crack length increment during a cycle, orders of magnitude larger than expected from purely cyclic tests at higher frequencies. During the hold-time follows the growth determined from pure sustained load tests, with the exception of an initial transient after the opening of the embrittled zone. An attempt to model the crack growth rate was made using a superposition model where the crack growth increments from high frequency da/dN testing and sustained load tests were added. The predictions of the total crack growth rate are generally adequate, but when the predictions of the individual contributions are scrutinized, it is obvious that the simple model does not correlate with the physical reality. Therefore both inter- and extrapolations from such a model are uncertain. Further, the test results show a decreased sustained load crack growth immediately after unloading/reloading of the crack. This transient behavior can potentially explain the reduction in crack growth rates previously explained by overload effects.

  • 27.
    Johannesson, Pär
    et al.
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Hållfasthet (BMh).
    Rychlik, Igor
    Chalmers University of Technology, Sweden .
    Laplace processes for describing road profiles2013Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 66, s. 464-473artikkel-id 464-473Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The Gaussian model is frequently used for modelling environmental loads, e.g. sea elevation, wind loads and road profiles. However, the Gaussian model is often only valid for short sections of the load. For example, for roads profiles, short sections of roads, say 100 m, is well modelled by a Gaussian process, whereas longer sections of roads, say 10 km, typically contain shorter sections with high irregularity, and the variability between sections is higher than what can be explained by the stationary Gaussian model. This phenomenon can be captured by a Laplace process, which can be seen as a Gaussian process with randomly varying variance. Thus, the Gaussian process is a special case of the Laplace process. Further, the expected damage can be computed from the parameters of the Laplace process. We will give examples of modelling road profiles using Laplace models. Especially, it will be demonstrated how to reconstruct a road profile based on sparse road roughness measurements, such as a sequence of IRI (International Roughness Index) for 100 metre road sections. Further, IRI data from the Finnish road network will be evaluated.

  • 28.
    Johannesson, Pär
    et al.
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Hållfasthet (BMh).
    Svensson, Thomas
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Hållfasthet (BMh).
    Reliable fatigue design, by rigid rules, by magic or by enlightened engineering2013Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 66, s. 12-25artikkel-id 12-25Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper discusses some basic differences between engineering approaches to fatigue reliability assessment. The comparison is based on the fact that mechanical fatigue is a highly empirical science with large uncertainties in prior knowledge, both regarding observed data and model accuracy. It is claimed that the amount of available prior physical knowledge should decide the level of complexity in reliability tools, not computer resources nor mathematical theory. As a result the second moment statistics is put forward as a useful tool in fatigue reliability assessment, either in the regulated form like in Eurocode or in a free engineering form like through the Variation Mode and Effect Analysis. The latter method is outlined in certain detail and its practical usefulness demonstrated for some engineering reliability problems

  • 29.
    Kanesund, Jan
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Moverare, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Johansson, Sten
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    The Deformation and Damage Mechanisms During Thermomechanical Fatigue (TMF) in IN7922011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 10, s. 189-194Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The deformation and damage mechanisms arising during thermomechanical fatigue (TMF) of the polycrystalline superalloy IN792 have been investigated. The TMF cycles used in this study are in-phase (IP) and out-of-phase (OP). The minimum temperature used in all TMF-tests is 100 °C while the maximum temperature is 750 °C in the IP TMF-tests and 850° or 950 °C in the OP TMF-tests. Most cracks have propagated transgranularly through the material and this holds for all temperatures used in this study. In all tests, the cracks have initiated and propagated in locations where deformation structures such as deformation bands have formed in the material. In the temperature interval 750°-850 °C, twins are formed in both IP and OP TMF-tests and this behaviour is observed to be further enhanced close to a crack. Twins are to a significantly lesser extent observed for tests with a higher (950 °C) maximum temperature. Recrystallization at grain boundaries, around particles and within the deformation structures have occurred in the OP TMF-tests with a maximum temperature of 850° and 950 °C and this is more apparent for the higher temperature.

  • 30.
    Kapogianni, Elena
    et al.
    Ethniko Metsovio Polytechnico, School of Rural and Surveying Engineering, Athens, National Technical University of Athens.
    Sakellariou, Michael G.
    Ethniko Metsovio Polytechnico, School of Rural and Surveying Engineering, Athens, National Technical University of Athens.
    Laue, Jan
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.
    Springman, Sarah M.
    Institute of Geotechnical Engineering, ETH Hönggerberg, Zürich.
    Investigation of the Mechanical Behaviour of the Interface between Soil and Reinforcement, via Experimental and Numerical Modelling2016Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 143, s. 419-426Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The purpose of this study is to investigate the interface properties between soil and reinforcement, via experimental and numerical modelling of reinforced slopes. In particular, several scale models were built and tested under enhanced gravity in the geotechnical drum centrifuge at ETH Zurich and corresponding prototype numerical models were analyzed via a finite element stress analysis code. Optical fibre sensors were attached on the reinforcement layers of the experimental scaled models in order to measure linear strain during the increase of the g-level, and the results were compared to linear strain that was derived by the numerical analysis of the correspondent prototype reinforced slopes. The interface between soil and reinforcement was expressed in terms of normal and shear stiffness on the soil-reinforcement boundary and different values were tested in order to achieve validation of the experimental and numerical results.

  • 31.
    Koptyug, Andrey
    et al.
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik och hållbar utveckling.
    Bäckström, Mikael
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik och hållbar utveckling.
    Tinnsten, Mats
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik och hållbar utveckling.
    Carlsson, Peter
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik och hållbar utveckling.
    Cross-country ski vibrations and possible mechanisms of their influence on the free gliding2012Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 34, s. 473-478Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Present paper describes the results of experimental studies on the self-induced and forced vibrations of loaded cross country skis and presents the discussion on the possible mechanisms causing such vibrations and the ways they can influence the friction between the ski running surface and the snow. Studied vibrations of gliding skis are most probably caused by the frictional effects. Mechanisms involved are similar to the ones causing the brake disc squeal or the violin string excitation by the bow. Major factors responsible for the development of these vibrations such as micro roughness of the surfaces, nonlinearities in the material properties, thermo-elastic instabilities and instabilities due to decreasing friction with increasing sliding velocity are also common for the case of gliding skis. The results of this study indicate that the ski vibration pattern both in amplitude and in frequency could influence the ski gliding properties. Though it seems quite feasible that the control of the cross country ski vibrations can improve the gliding performance, further systematic studies are needed to confirm it and to formulate the consecutive strategies of cross country ski design improvement.

  • 32. Kukkola, J
    et al.
    Jansson, E
    Popov, A
    Lappalainen, J
    Mäklin, J
    Halonen, N
    Tóth, G
    Shchukarev, Andrey
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
    Mikkola, Jyri-Pekka
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
    Jantunen, H
    Kordás, K
    Hast, J
    Hassinen, T
    Sunnari, A
    Jokinen, K
    Haverinen, H
    Sliz, R
    Jabbour, G
    Fabritius, T
    Myllylä, R
    Vasiliev, A
    Zaretskiy, N
    Novel printed nanostructured gas sensors2011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 25, s. 896-899Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    There is a need for low-cost mass-production circuits on various substrates, possibly performing some simple functions as switches, antennas, displays, and sensors. Also in the field of gas sensors widely used in several applications there is a need for such novel fabrication technologies and materials. In this paper, we present three gas sensor structures fabricated using novel printing techniques. Inkjet and gravure printing techniques were used for fabrication of resistive WO3 nanoparticle gas sensors for detection of NO, and inkjet printing was utilized for fabrication of solid electrolyte (mixture of H3PW12O40 and PVC) in a nanostructured Metal-Electrolyte-Insulator- Semiconductor (MEIS) transistor for detection of H2. The sensor structures were found to be sensitive for detection of NO below 10 ppm, and H2 below 100 ppm concentrations in synthetic air, respectively.

  • 33.
    Leidermark, Daniel
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Moverare, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Segersäll, Mikael
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial.
    Simonsson, Kjell
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Sjöström, Sören
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Johansson, Sten
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Evaluation of Fatigue Crack Initiation in a Notched Single-crystal Superalloy Component2011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 10, s. 619-624Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The fatigue crack initiation in a notched single-crystal nickel-base superalloy component at 500 °C was investigated and analysed. A critical plane approach in combination with a critical distance method has been adopted, in which the total shear strain ranges on the discrete slip planes are evaluated. Furthermore, a Coffin-Manson type of expression is used to predict the number of cycles to fatigue crack initiation. The experimental test specimens were studied by microscopy to determine on which crystallographic plane the fatigue initiation occurred. A good correlation between the experimental results and the simulated results were found.

  • 34.
    Leidermark, Daniel
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Moverare, Johan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Simonsson, Kjell
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Sjöström, Sören
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Johansson, Sten
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
    Fatigue crack initiation in a notched single-crystal superalloy component2010Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 2, nr 1, s. 1067-1075Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this paper, the fatigue crack initiation in notched single-crystal test specimens of material MD2 is investigated and analysed. A critical plane approach is adopted, in which the total strain ranges on the discrete slip planes are evaluated. Furthermore, a Coffin-Manson type of expression is used to describe the number of cycles to fatigue crack initiation. This relation is determined from a set of smooth test specimens loaded uniaxially in the [001], [011] and directions at 500 °C with Rε=−1. The numerical procedure is then applied to a series of experiments, in which notched single-crystal test specimens were exposed to uniaxial cyclic loading in the [001] direction at 500 °C with Rε=0.

  • 35.
    Liu, Ting
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Vattendragsteknik.
    Yang, James
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Vattendragsteknik.
    Air-pocket movement in an 18.2 degree downward 240 mm conduit, experimental studies2012Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 28, s. 791-795Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Experiments are carried out in a test rig, consisting of a Plexiglas pipe with an inner diameter of 240 mm and an inclination of 18.2o, to investigate air-water two-phase flows in conjunction with bottom spillways. Results show that the critical velocity, which is the minimal water velocity to start moving an air pocket, in the rough pipe, is independent of the air-pocket volume; in the smooth pipe it doesn’t increase with increasing diameter as much as the previous researchers indicated. Pipe roughness doesn’t affect the velocity of the air-pocket when it moves upstream in the downward inclined pipe.

  • 36.
    Lloyd Spetz, Anita
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten. Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Sobocinski, Maciej
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Halonen, Niina
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Puglisi, Donatella
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Juuti, Jari
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Jantunen, Heli
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Andersson, Mike
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten. Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    LTCC, new packaging approach for toxic gas and particle detection2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 120, s. 484-487Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Packaging of chemical sensors is still an area, which is not much explored. Low temperature co-fired ceramic, LTCC, packaging offers large advantages in terms of 3D design, integration of advanced functionality and fast processing. SiC based FET gas sensors are possible to integrate directly in the LTCC co-firing process at 850 °C, whereby both high temperature and other advanced applications like ultra-low detection of toxic gases are greatly improved. The LTCC packaging is also used for development of particle detectors as well as packaging for an electrical method to detect toxic effect on cells by particles.

  • 37.
    Lundgren, Lina
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    Bligård, Lars-Ola
    Division of Design & Human Factors, Chalmers University of Technology, Gothenburg.
    Brorsson, Sofia
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    Osvalder, Anna-Lisa
    Division of Design & Human Factors, Chalmers University of Technology, Gothenburg.
    Implementation of usability analysis to detect problems in the management of kitesurfing equipment2011Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 13, s. 525-530Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Equipment used for high-risk sports, such as kitesurfing, needs to be efficient for the intended use and the user, and thus meet the mechanical demands and provide sufficient safety. Accidents related to kitesurfing occur, and the consequences are sometimes catastrophic. One important factor is the equipment design, which can influence the type and number of injuries due to insufficient safety systems. The aim of this study was to investigate how the design of kitesurfing equipment can affect safety issues from a usability perspective in relation to the task of preparation. A focus group of 6 subjects analyzed the task of preparing kitesurfing equipment for riding, using the evaluation methods Enhanced Cognitive Walkthrough (ECW) and Predictive Use Error Analysis (PUEA). From the evaluation, a list of plausible usability problems was identified together with proposed design guidelines. The results showed that usability problems occur during preparation. In total 35 usability problems were found, of which 11 (4 from ECW and 7 from PUEA) have a great impact on safety. These 11 problems were hard to detect for the user and could result in serious consequences for the kitesurfers during rideing. The analysis resulted in some general guidelines that are possible to implement on different types of kites. To conclude, education and improved design of the equipment are essential to increase the safety of the sport.

  • 38.
    Maghsood, Roza
    et al.
    Chalmers University of Technology, Sweden.
    Rychlik, Igor
    Chalmers University of Technology, Sweden.
    Johannesson, Pär
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Hållfasthet (BMh).
    Load description and damage evaluation using vehicle independent driving events2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 101, s. 268-276s. 268-276Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We consider the loads that are related to steering events, and focus on the events that cause high forces on steering components. The load is simplified by keeping the extreme force value for each driving event. We define a simplified stochastic model for the load by modeling the extreme value for each driving event by a random variable. We give formulas to compute the theoretical load spectrum and the expected fatigue damage caused by the driving events. Further, in a sensitivity study we investigate how much the expected damage depends on the variability of parameters of the proposed model.

  • 39.
    Metri, Prashant G
    et al.
    Mälardalens högskola, Akademin för utbildning, kultur och kommunikation, Utbildningsvetenskap och Matematik.
    Metri, Pushpanjali G
    Department of Physics, Sangameshwar college Solapur, Maharashtra, India.
    Abel, Subhas
    Department of Mathematics, Gulbarga University,Gulbarga, Karnataka, India.
    Silvestrov, Sergei
    Mälardalens högskola, Akademin för utbildning, kultur och kommunikation, Utbildningsvetenskap och Matematik.
    Heat transfer in MHD mixed convection viscoelastic fluid flow over a stretching sheet embedded in a porous medium with viscous dissipation and non-uniform heat source/sink2016Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 157, s. 309-316Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A numerical model is developed to study the MHD mixed convective boundary layer viscoelastic fluid flow over a stretching sheet embedded in a porous medium in presence of viscous dissipation and non-uniform heat source have been investigated. The variation of porosity is assumed. The governing partial differential equations are converted into ordinary differential equations by applying suitable similarity transformations. Thenumerical solution of the problem is also obtained by the efficient Runge-Kutta-Fehlberg method with shooting technique. Here two types of different heating processes are considered namely, PST and PHF cases. The effect of various physical parameters such as Prandtl number, Eckert number, magnetic parameter, convection parameter and porous parameter which determine the temperature profiles are shown in several plots.Some important findings reported in this work reveals that the effect of viscous dissipation and non-uniform heat source have significant impact in controlling the rate of heat transfer in the boundary layer region.

  • 40.
    Mikkola, Eeva
    et al.
    Aalto University.
    Doré, Matthew
    TWI.
    Khurshid, Mansoor
    KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg.
    Fatigue strength of HFMI treated structures under high R-ratio and variable amplitude loading2013Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    High frequency mechanical impact (HFMI) is a post-weld treatment method for improving fatigue strength of welded joints. Much of the experimental research on fatigue performance of HFMI treated welded joints has concentrated on the beneficial compressive residual stresses created by the treatment and the fatigue strength of these joints under constant amplitude loading and relatively low mean stresses. Critical experimental data has been developed in a nearly completed European RFCS project. New mean stress and variable amplitude fatigue data are presented and evaluated with respect to a proposed International Institute of Welding (IIW) design guideline concerning HFMI treated welded joints.

  • 41.
    Niewiadomski, Pawel
    et al.
    Faculty of Civil Engineering, Wroclaw University of Technology.
    Cwirzen, Andrzej
    Aalto University, Espoo.
    Hola, Jerzy
    Faculty of Civil Engineering, Wroclaw University of Technology.
    The influence of an additive in the form of selected nanoparticles on the physical and mechanical characteristics of self-compacting concrete2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 111, s. 601-606Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The influence of nanoparticle additives on the physical and mechanical characteristics of hardened self-compacting concrete (SCC) was studied. Research included SCC concretes modified with different amounts of SiO2, TiO2 and Al2O3 nanoparticle additives and one reference concrete made without nanoparticles. Rheological properties, microstructure and compressive strength were determined. The obtained results showed that SiO2 and Al2O3 additions worsened the workability while the compressive strength was increased in the case of SiO2 addition. All studied nanomaterials densified the microstructure of the hydrated binder matrix

  • 42.
    Ongo, E
    et al.
    Industrial Technology Development Institute, DOST.
    Falasconi, Matteo
    CNR IDASC SENSOR Lab, University of Brescia.
    Sberveglieri, Giorgio
    SENSOR Lab, Department of Information Engineering, University of Brescia.
    Antonelli, A
    Dipartimento di Scienze della Terra, Universita di Modena e Reggio Emilia.
    Montevecchi, G
    Dipartimento di Scienze della Terra, Universita di Modena e Reggio Emilia.
    Sberveglieri, Veronica
    CNR IDASC SENSOR Lab, University of Brescia.
    Concina, Isabella
    CNR IDASC SENSOR Lab.
    Sevilla, F
    University of Santo Tomas, Manila.
    Chemometric discrimination of philippine civet coffee using electronic nose and gas chromatography mass spectrometry2012Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 47, s. 977-980Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This study presents a practical and promising approach to profile the headspace aroma attributes of Philippine civet coffee using electronic nose (E-nose) and gas chromatography mass spectrometry (GCMS). Chemometric pattern method was applied to enhance the discrimination of civet coffee against its control coffee beans (not eaten by civet animal). E-nose analysis revealed that aroma characteristic is one of the most important quality indicators of civet coffee. The result was supported by GCMS analysis. The chromatographic fingerprints indicated that civet coffee differed with their control beans in terms of composition and concentration of individual volatile constituents. Chemometric discrimination of E-nose and GCMS data demonstrated a clearly separated civet from their control coffees indicating that cultivar and geographic origins dictate the aroma and volatiles variations in coffee.

  • 43.
    Polák, Jaroslav
    et al.
    Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
    Petrás, Roman
    Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
    Heczko, Milan
    Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
    Kruml, Tomás
    Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
    Chai, Guocai
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan. Sandvik Materials Technology, Sandviken, Sweden.
    Analysis of Cyclic Plastic Response of Heat Resistant Sanicro 25 Steel at Ambient and Elevated Temperatures2014Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, nr 74, s. 68-73Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Austenitic heat resistant steel Sanicro 25 developed for high temperature applications in power generation industry has been subjected to selected low cycle fatigue tests at ambient and at elevated temperature. Saturated hysteresis loops at both temperatures were analyzed to deduce the probability density distribution of the internal critical stresses and to estimate the contribution of the effective stress for different strain amplitudes. The internal structure of the material at room and elevated temperature was studied using transmission electron microscopy and the results were discussed in relation to the cyclic stress- strain response

  • 44.
    Sjöström, Sören
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
    Brodin, Håkan
    Siemens Industrial Turbomachinery, FINSPÅNG.
    Influence of TBC end geometry on the TMF life of an APS TBC2010Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 2, s. 1363-1371Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A TBC subjected to TMF loading may spall off after a sufficiently large number of cycles. This is a consequence of a combination of general fatigue damage growth and strong internal stresses caused by oxidation in the bondcoat/topcoat interface. Further, at the ends of the coating there are stress singularities, at which early fatigue cracks tend to develop. This can, however, be avoided or delayed by making the coating end chamfered. This work investigates the influence of coating end chamfer on the fatigue life of an APS TBC.

  • 45.
    Sobocinski, Maciej
    et al.
    Microelectronics and Material Physics Laboratories University of Oulu, Finland.
    Khajavizadeh, Lida
    Microelectronics and Material Physics Laboratories University of Oulu, Finland.
    Andersson, Mike
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten. Microelectronics and Material Physics Laboratories University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten. Microelectronics and Material Physics Laboratories University of Oulu, Finland.
    Juuti, Jari
    Microelectronics and Material Physics Laboratories University of Oulu, Finland.
    Jantunen, Heli
    Microelectronics and Material Physics Laboratories University of Oulu, Finland.
    Performance of LTCC embedded SiC gas sensors2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 120, s. 253-256Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A novel approach to encapsulation/packaging of SiC field effect transistor gas sensors for high temperature applications, such as exhaust and fuel gas emissions monitoring, based on direct co-firing of sensor devices and Low-Temperature Co-fired Ceramics (LTCC) has been investigated. Structural (SEM, EDX, XPS), electrical (I/V, C/V) as well as gas sensing characterization of packaged devices has shown that the “one-step” packaging process forms a hermetic package with retained transducer functionality and gas sensing characteristics without the need for any separate die attachment, (wire) bonding, and/or sealing of the package. Long-term stability testing at elevated temperatures of packaged devices has also shown promising results.

  • 46.
    Sparf, Jörgen
    et al.
    Mittuniversitetet, Fakulteten för humanvetenskap, Avdelningen för samhällsvetenskap.
    Petridou, Evangelia
    Mittuniversitetet, Fakulteten för humanvetenskap, Avdelningen för samhällsvetenskap.
    Collaborations in Routine Emergency Management: Lessons from Sweden2018Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 212, s. 302-308Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Effective collaborations in emergency management is the Holy Grail for practitioners in Sweden and elsewhere. More than mere coordination, interorganizational collaboration is deemed by many as the most optimal arrangement to share resources and respond to emergencies more quickly and efficiently. It is also considered to be the source of a broadly and rather vaguely defined concept of greater good. Such collaborations tend to be uncritically accepted as innovative, especially in instances of large-scale disasters or planned events while routine emergency management arrangements tend to be under researched. This research is an in-depth case study of an interorganizational collaboration in the greater Stockholm region in Sweden concerning routine emergency management. The collaboration comprises the physical relocation of one operator each from seven organizations in the area and the establishment of the “Collaboration Cluster”. Rather than attempt to define the concept of “greater good” we set out to evaluate the quality of collaboration from the perspective of each member organization. We build a multi-dimensional model to assess the expectations of each organization at the political, managerial, and operative level. What is more, we view the Collaboration Cluster as a network at the operative level and for this reason we employ formal Social Network Analysis (SNA) to tease out network variables that have an effect on the quality of collaboration.

  • 47.
    Svensson, Thomas
    et al.
    TS Ingenjörsstatistik, Sweden.
    Hannes, Dave
    Inspecta Technology AB, Sweden.
    Johannesson, Pär
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Hållfasthet (BMh).
    Dahlberg, Magnus
    Inspecta Technology AB, Sweden.
    Anderson, Andreas
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Hållfasthet (BMh).
    Three HCF models for strain fatigue life of welded pipes in austenitic stainless steel2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 101, s. 476-484s. 476-484Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Fatigue bending tests have been performed on welded pipes made from an austenitic stainless steel. Four types of loading were used: 1) constant amplitude, 2) a load expected at pressure vessel environment, 3) a Gaussian load, and 4) a specially constructed two-level block load. The twenty-eight test results are evaluated using three different models: 1) the classical Basquin equation neglecting the fatigue limit, 2) the ASME model with a fatigue limit, and 3) a model with continuously decreasing fatigue limit. No significant differences between the three models were found. Predictions based on constant amplitude results appear to be non-conservative.

  • 48.
    Troynikov, Olga
    et al.
    RMIT University, School of Fashion and Textiles, Melbourne, Australia.
    Wardiningsih, Wiah
    RMIT University, School of Fashion and Textiles, Melbourne, Australia.
    Koptyug, Andrey
    Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kvalitetsteknik, maskinteknik och matematik.
    Watson, Chris
    RMIT University, School of Fashion and Textiles, Melbourne, Australia.
    Oggiano, Luca
    The Norwegian University of Science and Technology, Trondheim, Norway.
    Influence of Material Properties and Garment Composition on Pressure Generated by Sport Compression Garments2013Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 60, s. 157-162Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Sports compression garments (SCG) have been used by athletes for years as means of enhancement of theirperformance and speed of recovery. In this research, the investigation into the effects the physical attributes ofsuitable materials and their composition and orientation in SCG have upon the amount and distribution of pressuregenerated to the underlying body was undertaken. Two different knitted fabrics suitable for compression sportgarment with different physical properties and elastic performance attributes were chosen. Experimental fabricsleeves were assembled, so that they provided different fabric strains around the circumference of the differentdiameter of cylinders they were placed on. The pressure generated by sleeves was measured using Salzmannpressure-measuring device MST MK IV and Salzmann MST 2007 software. It was determined that different materialcomposition of fabric assemblies influenced the pressure delivery of garment. However no clear relationship betweenthe fabric percentage in assembly composition and the generated pressure was established.

  • 49.
    Welearegay, T. G.
    et al.
    Univ Rovira & Virgili, MiNoS, Ave Paisos Catalans 26, E-43007 Tarragona, Spain.;Mol Fingerprint Sweden AB, Eksatravagen 130, S-75655 Uppsala, Sweden..
    Gualdron, O. E.
    Univ Pamplona, GISM, Pamplona Km 1 Via Bucaramanga, Norte De Santander 543050, Colombia..
    Jaimes, A. L.
    Univ Pamplona, GISM, Pamplona Km 1 Via Bucaramanga, Norte De Santander 543050, Colombia..
    Caceres, J. M.
    Univ Pamplona, GISM, Pamplona Km 1 Via Bucaramanga, Norte De Santander 543050, Colombia..
    Pugliese, G.
    Univ Rovira & Virgili, MiNoS, Ave Paisos Catalans 26, E-43007 Tarragona, Spain.;Univ Pamplona, GISM, Pamplona Km 1 Via Bucaramanga, Norte De Santander 543050, Colombia..
    Cindemir, Umut
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Fasta tillståndets fysik. Mol Fingerprint Sweden AB, Eksatravagen 130, S-75655 Uppsala, Sweden..
    Duran, C. M.
    Univ Pamplona, GISM, Pamplona Km 1 Via Bucaramanga, Norte De Santander 543050, Colombia..
    Österlund, Lars
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Fasta tillståndets fysik. Mol Fingerprint Sweden AB, Eksatravagen 130, S-75655 Uppsala, Sweden..
    Ionescu, Radu
    Univ Rovira & Virgili, MiNoS, Ave Paisos Catalans 26, E-43007 Tarragona, Spain.;Univ Autonoma Caribe, Fac Engn, Barranquilla, Colombia..
    Ultrapure Organically Modified Gold Nanoparticles for Breath Analysis2016Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 168, s. 133-136Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this study we present a new technological approach for the fabrication of ultrapure organically modified gold nanoparticles (AuNPs) for chemical sensing applied to exhaled breath analysis. To achieve a high purity level of the sensing films, we combined Advanced Gas Deposition (AGD) technique to deposit ultrapure monodispersed AuNPs, and dip coating process for functionalization of the AuNPs with thiolated organic ligands. Morphology and surface analysis revealed the deposition of ultrapure isolated AuNPs after the first processing step, and a network of nanoparticle-ligand nanoassemblies after the second processing step. Gas sensing measurements were performed with exhaled breath samples collected from a group of smokers, a group of non-smokers, and ambient air. Sensors responses towards these samples demonstrated characteristic responses for each study group. PCA analysis further revealed samples classification in three distinct characteristic clusters, which indicates the suitability of the molecularly modified AuNPs presented in this communication for breath analysis applications.

  • 50. Welearegay, T. G.
    et al.
    Gualdrón, O. E.
    Jaimes, A. L.
    Cáceres, J. M.
    Pugliese, G.
    Cindemir, U.
    Durán, C. M.
    Österlund, L.
    Ionescu, R.
    Ultrapure Organically Modified Gold Nanoparticles for Breath Analysis2016Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 168, s. 133-136Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this study we present a new technological approach for the fabrication of ultrapure organically modified gold nanoparticles (AuNPs) for chemical sensing applied to exhaled breath analysis. To achieve a high purity level of the sensing films, we combined Advanced Gas Deposition (AGD) technique to deposit ultrapure monodispersed AuNPs, and dip coating process for functionalization of the AuNPs with thiolated organic ligands. Morphology and surface analysis revealed the deposition of ultrapure isolated AuNPs after the first processing step, and a network of nanoparticle–ligand nanoassemblies after the second processing step. Gas sensing measurements were performed with exhaled breath samples collected from a group of smokers, a group of non-smokers, and ambient air. Sensors responses towards these samples demonstrated characteristic responses for each study group. PCA analysis further revealed samples classification in three distinct characteristic clusters, which indicates the suitability of the molecularly modified AuNPs presented in this communication for breath analysis applications.

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