Welded joint is a mechanical heterogeneous body, and the mechanical heterogeneity has great effect on dynamic fracture behaviour of welded joint.

焊接接头是一个宏观力学不均匀体，力学不均匀性对焊接接头的动态断裂行为有重要的影响。

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Welded joint is a mechanical heterogeneous body, and the mechanical heterogeneity has great effect on dynamic fracture behaviour of welded joint.

焊接接头是一个宏观力学不均匀体，力学不均匀性对焊接接头的动态断裂行为有重要的影响。

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