Investigation of strength mis-match effect on elastic plastic fracture parameters in laser beam welded aluminium alloy joints using the finite element method
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Media type:
E-Article
Title:
Investigation of strength mis-match effect on elastic plastic fracture parameters in laser beam welded aluminium alloy joints using the finite element method
Contributor:
Özdemir, Uğur;
Yeni, Çınar
Published:
SAGE Publications, 2015
Published in:
Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 229 (2015) 3, Seite 218-225
Language:
English
DOI:
10.1177/1464420713509084
ISSN:
2041-3076;
1464-4207
Origination:
Footnote:
Description:
In this study, elastic plastic fracture toughness parameters of laser-welded 6013 aluminium alloy are investigated. For this purpose, compact tension specimens used in the experimental study are modelled using the finite element software. In the analyses, crack tip opening displacement ( δ5) and J-integral values are determined and crack tip opening displacement, δ5and J-integral resistance curves (R-curves) are generated. Crack tip opening displacement, δ5resistance curves are compared with those obtained from the experimental work, and J-resistance curves are compared with those obtained from formulation. Effect of weld strength undermatching on crack tip opening displacement, δ5and J-resistance curves is discussed. δphvalues obtained by the plastic hinge method are compared with the crack tip opening displacement, δ5values. Fracture toughness parameters obtained from the finite element analysis showed a good agreement with those obtained from the experimental work and formulation. It is observed that the resistance curves obtained using the crack tip opening displacement, δ5and J-integral characterize the resistance of the material against crack growth in a similar manner, and strength undermatching decreases the fracture resistance. The relationship between δphand crack tip opening displacement, δ5is nonlinear, and as crack tip opening displacement increases, crack tip opening displacement, δ5becomes larger than δph.