FATIGUE BEHAVIOR OF SPOT WELDS IN MODIFIED TENSILE SHEAR SPECIMENS USING NUMERICAL DATA

The resistance spot wells are used especially in automotive and airplane industry-for example, a car body contains approximately 5000 spot weld and this spot weld numbers reach to 15000 in a bus or coach body according to contraction engineers- because of its simplicity, low cost and of course reliability (which are significant aspects of manufacturing processes) to the other type of joining techniques like rivet joint, bolted joint and bonded joint. In this point, it can be said that the integrity of the resistance spot welds determines the overall structural rigidity and integrity of the vehicle. Thus, it is important to understand the mechanical behavior of spot welds under representative types of loading conditions and the life predictions of spot welded specimens