Abstract
The welded lap joints with different matching are analyzed by Moire interferometry. The strain distribution with lower matching in front weld metal are higher than that with higher matching in front weld metal. The strain distributions with lower matching in base metal are lower than that with higher matching in base metal. The strain distribution of different matching along the force parallel direction has little difference. The V field fringe deformation of different matching in base metal and weld metal are the same. The U field fringe deformations are different. The fringes with lower matching in weld metal are more crowded than base metal. The fringe with higher matching is more concentrated in the middle. The strain distributions of higher matching in weld metal are lower. The finite element was used to prove the experiment results in this paper. This result has engineering meaning to improve the mechanical properties of the welded lap joint.
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