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- Title
S-N CURVE AND QUANTITATIVE RELATIONSHIP OF SINGLE-SPOT AND MULTI-SPOT WELDINGS.
- Authors
L. Yang; B.Yang; G. W. Yang; S. N. Xiao; T.Zhu; F.Wang
- Abstract
The relevant ΔF-N curves are fitted based on the experimental life and load of single-spot and multispot- welded specimens. To improve the correlation and universality of curves, a unified S-N curve is needed. The finite element model of spot welding is firstly established. The S-N curves of single-spot and multi-spot-welded specimens are thereafter obtained according to the fatigue life of spot-welded specimens and the corresponding equivalent structural stress calculated based on the Sheppard method. To improve the fitting effects of S-N curves with relatively low correlation coefficients, the structural stress formulae are optimized using three different optimization methods based on the quasi-Newton method. Finally, the quantitative relationship among the S-N curves of spot welding with different solder joints is deduced; the foregoing can provide reference for the prediction of fatigue life of multi-spot welding.
- Subjects
SPOT welding; QUASI-Newton methods; SOLDER joints; FATIGUE life; METAL fatigue; CURVES; WELDING
- Publication
International Journal of Simulation Modelling (IJSIMM), 2020, Vol 19, Issue 3, p482
- ISSN
1726-4529
- Publication type
Article
- DOI
10.2507/IJSIMM19-3-CO11