Practical Method for Estimation of Fatigue Strength of Spot Welded Joint

It is natural to see the edge of nugget in spot weld joint as a sharp notch or crack. In this sense, driving force for fatigue crack growth can be estimated using fracture parameter such range stress intensity factor ΔK. research, Equivalent Stress Intensity Factor Range ΔKeq defined through integration field employed parameter. The primary advantage its simplicity computation. known that strengths welded joints are influenced by various factors, plate thickness, diameter, number welds and their arrangement, geometry component, combined loading condition welding residual stress. effects these factors consistent manner proposed method which based on master curve identified from experimental data. Its potential usefulness design demonstrated typical examples.