Pouranvari - Metallurgical Department ,Islamic Azad University of Dezful
Marashi - Mining and Metallurgical Engineering Department Amirkabir University of Technology
Goodarzi - Materials Science and Engineering Departyment Iran University of Science & Technology

An analytical model predicting Failure mode and estimating minimum fusion zone size to ensure pull out failure mode of resistance spot welds during tensileshear test was proposed. According to this model, ratio of fusion zone hardness to failure location hardness is the key metallurgical factor governing failure mode of spot welds during tensile-shear test, in addition to sheet thickness.

Resistance spot weld; Failure mode; Fusion Zone Size; Airy Functions