Abstract
In the present investigation, the constraint conditions of the cross tension test specimen for the strength evaluations of resistance spot welded joint by the jig during the test are investigated. Finite element analyses were performed for the processes of tightening the specimen and the jig by the bolts and nuts and for the cross tension test. Contact stress between the specimen and jig are examined. The force-displacement relationship and the contact stress distribution suggest that slips between the specimen and jig occurred. It is also indicated by the results of the analyses that the load carrying mechanism change from the contact between the specimen and the jig to that between the specimen and the bolt. The change is considered to influence the load displacement relationship measured during the test.
