Based on the adoption of elastoplastic damage theory and effective strain assumption, weld metal coupons were tested under repeated pull and their damage evolution law was determined.

基于各向同性弹塑性损伤假定和应变等效假设，采用重复拉伸的试验方法，得到了焊缝金属的损伤演化规律。

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Under the assumption of equivalent strain principle, a damage constitutive model is established based on Mohr-Coulomb criterion.

根据应变等效假设可得到基于莫尔—库仑准则的损伤本构方程。

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