By researching on the mechanism,the rule of stable crack extension and the fracture parameters can be predicted,the effective fracture criterion can be found.
对该机理的研究,可以预知裂纹在材料中的扩展规律和断裂参数,寻求有效的断裂判据。
参考来源 - 搅拌摩擦焊接焊区裂纹稳定扩展数值分析·2,447,543篇论文数据，部分数据来源于NoteExpress
实验结果证明，本文所提出的复合型断裂判据是简便可行的。
The experimental results show that the new criterion is simple and feasible.
因此，在非均质焊接接头中直接应用J积分作为断裂判据不合适。
So, it is doubtful to directly use the J -integral as a fracture criterion in heterogeneous welded joints.
以软钢为算例，本断裂判据可以比较好地解释和陈大年等给出的实验结果。
As an example, the results for mild steel indicate that the complete-fracture criterion derived in this article could be better to explain the experimental results given by and Chen et al.
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