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研究了具有不同焊缝金属强度匹配（高和低匹配）、不同材料本构关系（带有Ｌｕｄｅｓ屈服平台或幂硬化材料）和不同断裂类型（全面屈服断裂和韧带屈服断裂）焊接接头中的Ｊ积分参量及其应用的可行性。指出至少对本文所研究的情况而言，Ｊ积分值是与路径有关的。同时对云纹干涉法实验所测得的位移场分析表明，在ｖ场中Ｊ主导有条件地存在，在：ｔ场中Ｊ主导失效。还介绍了用于评定焊缝金属解理断裂的评定法，应用Ｂｅｒｅｍｉｎ模型预测了由ＬＢ５２ＮＳ焊条施焊的Ａ５３７钢焊接接头焊缝金属断裂参量σｕ和ｍ，即通过低温拉伸试验和有限元程序计算给出了该模型的两个参量值ｍ＝２２、σｕ＝１８６３ＭＰａ。
The effects of different weld metal strength matching (high and low matching), different material constitutive relations (with Ludes yielding platform or power hardening material) and welding joints with different fracture types (total yield fracture and ligament yield fracture) Integral parameters and the feasibility of their application. At least for the case studied in this article, J-scores are path-related. At the same time, the analysis of the displacement field measured by the moire interferometry experiment shows that J dominates in v field and J dominates in t field. The method of evaluating the cleavage fracture of weld metal was also introduced. The Bertel model was used to predict the weld metal fracture parameters σu and m of A537 steel welded joints welded by LB52NS welding rod, that is, the low temperature tensile test and finite element program The calculation gives two parameters of the model m = 22, σu = 1863MPa.