A Study on the Fatigue Characteristics of Spot Weld Specimen use in Vehicle Body as the Applied Load Pattern

하중작용방식에 따른 차체용 점용접체의 피로특성에 관한 연구

In this study, the fatigue charateristics of weld specimen was studied experimentally by using the various specimen types. The specimen type were tensile shesr(TS) specimen, cross tension(CT) specimen, and T typr (TT) specimen. Tensile test and fatigue test were carried out and microstucture was investigated. Finite element method was used to investigate stress distribution near nugget edge. Finally fracture mechanics approach was tried to the various specimen types.