Welding spot failure testing method and clamp

The invention provides a welding spot failure testing method and a clamp, and belongs to the technical field of testing. According to the invention, the clamp adjusting device is used for eliminating the assembly simple gap and restraining the shape of the sample piece, the sample piece is used to form an approximate rigid body state, and the sample piece cannot generate large deformation due to load during testing, so that the influence of deformation on a welding spot shear stress testing result is reduced, and the testing efficiency is improved. And a more accurate welding spot failure test result in a shear stress state can be obtained. 本申请提供了一种焊点失效测试方法及夹具，属于测试技术领域。本申请通过夹具调整装置消除装配简隙，对样件的形状进行约束，使用样件形成近似刚体状态，在测试时，样件不会因受到载荷时产生较大的变形，从而减少变形对焊点剪切应力测试结果的影响，能获得更精准的剪切应力状态下焊点失效测试结果。