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  • 1. Andreasson, Eskil
    et al.
    Jemal, Abdulfeta
    Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, Avdelningen för maskinteknik.
    Katangoori, Rahul Reddy
    Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, Avdelningen för maskinteknik.
    Is it possible to open beverage packages virtually? Physical tests in combination with virtual tests in Abaqus.2012Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The opening mechanism in a beverage package, where a mixed mode failure occurs, is a rather complex phenomenon. A better knowledge in respect of fracture mechanics is needed for the proactive prediction of the overall opening performance. Reliable material data used for virtual simulation of the opening mechanism is extracted by characterization and calibration of the packaging materials. Knowledge of how to choose appropriate constitutive models for the continuum material and how the damage initiates and propagates to various loading conditions is of great interest. The virtual tests, replicating the physical tests, are performed with the aid of the finite element method. Non-linear material response, anisotropic material behaviour, large deformation and fracture mechanics are identified effects that are all included in the virtual model. The results presented in this paper show possible selections of material models in conjunction with material damage models, adequately describing thin polymer films behaviour. Comparison between the physical test and the virtual test, exerted to fracture Mode I – Centre Cracked Tension, showed a good correlation for the chosen modeling technique.

    Fulltekst (pdf)
    fulltext
  • 2.
    Kao-Walter, Sharon
    et al.
    Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, Avdelningen för maskinteknik.
    You, Zhong
    Jiang, Xun
    Katangoori, Rahul Reddy
    Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, Avdelningen för maskinteknik.
    Stress and Stability Analysis of a Building Column with a Pre-folded Origami Pattern2012Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A tubular structure by applying the pre-folded origami pattern has been developed at the department of Engineering Science, University of Oxford (see Figure 1). Most of the application is in vehicles. For further application possibility in the fields of Building, bridge, Subway or underground structure, stress and stability analysis were performed. Different cases were calculated by theory of instability and Finite Element Method. Different design solutions were introduced and their strength and stability properties were compared by loading the structure with a compression force on the top of the column. The objective of this work is to find a good solution in safety, sustainability and economy point of view. Failure risk due to the eventually pre-crack in structure will also be discussed by the theory of fracture mechanics.

  • 3.
    Katangoori, Rahul Reddy
    et al.
    Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, Avdelningen för maskinteknik.
    Kao-Walter, Sharon
    Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, Avdelningen för maskinteknik.
    You, Zhong
    Conceptual study on an origami patterns of type I tapered square tub with and without a crack2013Inngår i: Applied Mechanics and Materials, Trans Tech Publications, Switzerland , 2013, Vol. 275-277, s. 184-188Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Thin-walled tubes with origami patterns are popular design for the energy observing devices. However, less study has been done when they subjected to cracks. In this work, the origami square tube with different height to wall thickness ratio are first studied to investigate the collapse modes and deformation mode. Further more, stress concentration areas are identified by numerical simulations. Finally, horizontal and vertical crack was implemented in one of the side in order to study the effect on the deformation mode.

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