Premium
Combined effect of strength & sheet thickness on fatigue behaviour of resistance spot welded joint
Author(s) -
GHOSH S.,
PAL T. K.
Publication year - 2010
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2010.01467.x
Subject(s) - spot welding , materials science , welding , joint (building) , composite material , ultimate tensile strength , fatigue limit , lap joint , shear (geology) , shear strength (soil) , fracture (geology) , structural engineering , engineering , environmental science , soil science , soil water
Fatigue performance of spot welded lap shear joint is primarily dependent on weld nugget size, sheet thickness and corresponding joint stiffness. Two automotive steel sheets having higher strength lower thickness and lower strength higher thickness are resistance spot welded with established optimum welding condition. The tensile‐shear strength and fatigue strength of lap shear joint of the two automotive steel sheets are determined and compared. Experimental fatigue life of spot welded lap shear joint of each steel are compared with predicted fatigue lives using different stress intensity factor solutions for kinked crack and spot weld available in literature. Micrographs of fatigue fractured surfaces are examined to understand fracture micro‐mechanisms.