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五、基于断裂力学理论的抗脆断设计及缺陷安全性评定规范介绍 为了防止低应力脆断,对缺陷的严重性要进行评定,评定方法目前已有十多种,编成规范的有六种,下面着重结合实例介绍四种。 1.美国ASME规范第Ⅲ篇附录G关于“防止无延性破坏”规程的分析 这是一个以线弹性断裂力学的应力强度因子分析为基础的抗脆断设计规范。其分析进程如下:
V. FRACTURE-RESISTANT DESIGN BASED ON THE MECHANICS OF FRACTURE MECHANICS AND THE DEFICIENCY ASSESSMENT OF DEFECTIVE DEFENSE In order to prevent the low-stress brittle fracture, the severity of the defect should be evaluated. There are over ten assessment methods currently available, and there are six The following focuses on examples of four. 1. ASME Code Part III, Appendix G Analysis of the Rules for Preventing Undisturbed Destruction This is a code designed to resist brittle fractures based on the analysis of stress intensity factors for linear elastic fracture mechanics. The analysis process is as follows: