For the establishment of the spot welded structure fatigue life prediction method by CAE, there is a method of using the nominal structural stress of the spot welding as the evaluation parameter. The nominal structural stress calculation method can obtain the nominal structural stress accuracy by using the general loads and the displacements in the vicinity of nugget. In this study, the effect caused by moving the spot welding position was researched using the LL structure under the share load. As a result, it was found that the stress solution can be accurately obtained by using the general loads of when the spot welding position was moved and the value of a part of boundary displacement. And it was shown that the place where the nominal structural stress occurs was different according to the spot weld position.
