A General Failure Criterion for Spot Welds with Consideration of Plastic Anisotropy and Separation Speed 2003-01-0611
A general failure criterion for spot welds is proposed with consideration of the plastic anisotropy and the separation speed for crash applications. A lower bound limit load analysis is conducted to account for the failure loads of spot welds under combinations of three forces and three moments. Based on the limit load solution and the experimental results, an engineering failure criterion is proposed with correction factors determined by different spot weld tests. The engineering failure criterion can be used to characterize the failure loads of spot welds with consideration of the effects of the plastic anisotropy, separation speed, sheet thickness, nugget radius and combinations of loads. Spot weld failure loads under uniaxial and biaxial opening loads and those under combined shear and twisting loads from experiments are shown to be characterized well by the engineering failure criterion.
Citation: Lin, S., Pan, J., Tyan, T., and Prasad, P., "A General Failure Criterion for Spot Welds with Consideration of Plastic Anisotropy and Separation Speed," SAE Technical Paper 2003-01-0611, 2003, https://doi.org/10.4271/2003-01-0611. Download Citation
Author(s):
S.-H. Lin, J. Pan, T. Tyan, P. Prasad
Affiliated:
The University of Michigan, Ford Motor Company
Pages: 9
Event:
SAE 2003 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Welding & Joining-SP-1766
Related Topics:
Plastics
Welding
Crashes
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