Abstract

Failure of spot-weld joints in car body may cause noise, vibration and safety problems. Systematic procedures for estimating fatigue strength of general spot-weld joints are developed in this paper. Fatigue test results for various spot-welded specimens are analysed using the finite element method. It is found that the maximum principal strain at the nugget boundary on the inner surface governs the fatigue failure of spot-welded joints.

Keywords

• Spot-Welded Specimen;
• Fatigue Life;
• Finite Element Method;
• Tensile-Shear;
• Cross-Tension

• 점용접 시편;
• 피로수명;
• 유한요소법;
• 인장전단;
• 십자인장;