含周向穿透裂纹碳钢管道断裂实验与评价

Experimental and Analytical Fracture Assessment of Carbon Steel Piping with a Circumferential Through-wall Crack

工程界经常面对含缺陷构件的剩余强度和剩余使用寿命的评定，在过去的十多年中发展了几种对含缺陷构件弹塑性断裂评定的工程方法。基于实验结果对这些工程方法相对准确度和保守性的比较，目前还很有限。对２０号碳钢管道进行了纯弯曲断裂试验，并将实验结果与极限载荷分析。

Field engineers often face the needs to assess the residual strength and remnant life of cracked components A number of engineering methods for the assessment of elastic-plastic fracture behaviour of cracked components proposed in the past decade can be used for this purpose Comparisons of these different methods for assessing the relative degrees of accuracy and conservatism with experimental results are still limited In this paper, some fracture experiments on carbon steel piping with circumferential through-wall crack were conducted The results of these experiments are compared with limit-load analyses,the J-integral estimation method , and more elaborate elastic-plastic fracture analysis