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Prediction of fatigue life for multi-spot welded joints with different arrangements using different multiaxial fatigue criteria
Highlights Effects of arrangement on the fatigue strength of multi-spot welded joints have been studied. Fatigue lives of the specimens were estimated with six different multiaxial fatigue criteria. Among the employed criteria, the Smith–Watson–Topper’s criterion has the best accuracy.
Abstract In this paper, the effects of weld arrangement on the fatigue behavior of the multi-spot welded joints have been investigated via experimental and multiaxial fatigue analysis. To do so, three sets of the spot welded specimens with different arrangements were prepared and fatigue tests were conducted under the various cyclic loads. Experimental tests revealed that the spot welded arrangement effect has a considerable role in fatigue strength of multi-spot welded joints. A nonlinear finite element code was used to obtain the stress and strain distributions near the roots of the nuggets for the three kinds of the specimens. Fatigue lives of the specimens were predicted by means of six different multiaxial fatigue criteria using the local stress and strain values obtained from the finite element simulations. It was found that the SWT and Crossland criteria have the best accuracy for all types of the specimens among the applied criteria.
Prediction of fatigue life for multi-spot welded joints with different arrangements using different multiaxial fatigue criteria
Highlights Effects of arrangement on the fatigue strength of multi-spot welded joints have been studied. Fatigue lives of the specimens were estimated with six different multiaxial fatigue criteria. Among the employed criteria, the Smith–Watson–Topper’s criterion has the best accuracy.
Abstract In this paper, the effects of weld arrangement on the fatigue behavior of the multi-spot welded joints have been investigated via experimental and multiaxial fatigue analysis. To do so, three sets of the spot welded specimens with different arrangements were prepared and fatigue tests were conducted under the various cyclic loads. Experimental tests revealed that the spot welded arrangement effect has a considerable role in fatigue strength of multi-spot welded joints. A nonlinear finite element code was used to obtain the stress and strain distributions near the roots of the nuggets for the three kinds of the specimens. Fatigue lives of the specimens were predicted by means of six different multiaxial fatigue criteria using the local stress and strain values obtained from the finite element simulations. It was found that the SWT and Crossland criteria have the best accuracy for all types of the specimens among the applied criteria.
Prediction of fatigue life for multi-spot welded joints with different arrangements using different multiaxial fatigue criteria
Esmaeili, F. (author) / Rahmani, A. (author) / Barzegar, S. (author) / Afkar, A. (author)
2015-02-14
10 pages
Article (Journal)
Electronic Resource
English
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