Fully plastic failure stress for a single circumferential flaw on a pipe is evaluated by the limit load criteria in accordance with Appendix E-8 in the JSME S NA-1-2004 and Appendix C in the ASME Code Section XI. However, multiple flaws such as stress corrosion cracking are frequently detected in the same circumferential cross section in a pipe. If the distance between adjacent flaws is short, the two flaws are combined as a single flaw in compliance with combination rules. If the two flaws separated by a large distance, it is not required to combine two flaws. However, there is no evaluation method for two flawed pipe in the JSME and ASME Codes. Failure stress for pipes with two circumferential flaws based on net-stress approach had been proposed by one of the authors. The present paper is concerned with the comparison of experimental data and the proposed theoretical method for pipes with circumferentially multiple flaws.
展开▼
机译：根据极限载荷标准，根据JSME S NA-1-2004中的附录E-8和ASME法规第XI节中的附录C，评估管道上单个圆周缺陷的完全塑性破坏应力。然而，经常在管道的相同圆周横截面中检测到诸如应力腐蚀开裂之类的多个缺陷。如果相邻缺陷之间的距离很短，则按照组合规则将两个缺陷合并为一个缺陷。如果两个缺陷相距较远，则不需要合并两个缺陷。但是，JSME和ASME规范中没有针对两个有缺陷的管道的评估方法。其中一位作者提出了基于净应力方法的具有两个圆周缺陷的管道的破坏应力。本文关注于具有多个缺陷的管道的实验数据的比较和所提出的理论方法。
展开▼
