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Generalising fatigue stress analysis of different laser weld geometries
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling.ORCID-id: 0000-0002-3569-6795
2011 (engelsk)Inngår i: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 32, nr 4, s. 1814-1823Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Two-dimensional elastic-plastic finite element analyses was carried out on a laser welded box beam in order to study the impact of the geometrical aspects of the joint type and weld root on the fatigue stress behaviour. Different experimental and hypothetical weld geometries were studied. Characteristic root shapes, measured by the plastic replica method, and critical geometrical aspects were classified and then studied by FE-analysis with respect to their impact on the maximum stress. The simulation of hypothetical transition geometries facilitated the identification of trends and the explanation of part of the phenomena. However, quantitative geometry criteria were only partially suitable to describe the relations. The results have shown that the combination of throat depth, local surface radius and its opening angle determines the peak stress value and its location. Beside extended throat depths, particularly larger toe radii and the avoidance of small opening angles and of surface ripples reduces the peak stress. The explanations were developed in a generalising manner, accompanied by illustrative and flow chart description.

sted, utgiver, år, opplag, sider
2011. Vol. 32, nr 4, s. 1814-1823
HSV kategori
Forskningsprogram
Produktionsutveckling
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URN: urn:nbn:se:ltu:diva-6652DOI: 10.1016/j.matdes.2010.12.031ISI: 000287642800009Scopus ID: 2-s2.0-79251648930Lokal ID: 4e5db008-54e2-4817-afa9-c69538c8b0a4OAI: oai:DiVA.org:ltu-6652DiVA, id: diva2:979538
Merknad
Validerad; 2011; 20101223 (ysko)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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