| FATIGUE STRENGTH ASSESSMENT INCLUDING WELDING RESIDUAL STRESS OF SPOT WELDED JOINTS SUBJECTED TO CROSS-TENSION LOADS |
| Y. S. PARK1, I. S. SOHN2, D. H. BAE3 |
1Sungkyunkwan University
2Osan University
3SUNGKYUNKWAN |
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| ABSTRACT |
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This paper presents a method to assess of fatigue strength for resistance spot welded joints, which incorporates welding residual stress effects. To achieve this, first, a non-linear finite element analysis (FEA) was performed to simulate the spot-welding process. To validate the FEA results, the numerically calculated welding residual stresses of spot welds were then compared with experimental results measured by X-ray diffraction method. The residual stress distributions showed good agreement between calculations and experiments. To evaluate the effects of welding residual stress on the fatigue design criterion of resistance spot welded joints subjected to cross-tension load, the stress amplitude ( |
| Key Words:
Welding, Residual stress, Fatigue, Strength, Spot welded joint |
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