Failure of spot welds under in-plane static loading |
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Authors: | P Wung T Walsh A Ourchane W Stewart M Jie |
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Institution: | (1) Ford Motor Company, MD44 AEC Building, 48121 Dearborn, MI;(2) University of Michigan at Dearborn, 48128 Dearborn, MI |
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Abstract: | Under in-plane loading conditions, two independent modes contribute to the failure of a spot weld: the in-plane shear mode
and the in-plane rotational mode. In this work, the failures of both modes under large static load are examined individually.
To study the combined failure of these two modes, two special test coupons are designed. The first coupon contains one spot
weld. The second coupon contains five spot welds. Tests conducted in this work show that a very simple force-based failure
criterion can be used to predict the failure of a spot weld under large in-plane combined static loads. Current multiaxial
failure theory cannot explain this combined failure. This force-based spot weld failure criterion fits current automotive
industry needs for body shell finite element application very well. |
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Keywords: | Spot weld force-based failure criterion multi-spot weld test verification spot weld crack spot weld failure |
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