摘要
验证含裂纹油气管道的失效评定曲线 ,实例来源于某输油管线现场水压试验中爆裂的三个管段。给出基于J积分理论的含裂纹管道的失效评定曲线的基本方程 ,并采用有限元方法计算裂纹管道的J积分。对三个破坏的含裂纹管段 ,根据现场测量的裂纹尺寸和管材的力学性能试验数据 ,建立失效评定曲线 ,并与水压实验结果作比较 。
The failure assessment curves of linepipe containing cracks are verified by a case that came from the three pipes burst in a proof test of an oil pipeline. The basic equation of failure assessment curve for a semi elliptical flaw in a pipe surface is described. J integral and its elastic component obtained by line spring element method. For the three pipes the failure assessment curves are set up according to the size of a flaw and the data of material mechanical test. Comparison with the result in the proof test shows the failure assessment curves presented in this paper is accurate.
出处
《机械强度》
CAS
CSCD
北大核心
2003年第3期251-253,共3页
Journal of Mechanical Strength
基金
中油集团公司创新基金资助项目 (CX98 2 7)~~
关键词
J积分
有限元
轴向裂纹
失效评定曲线
安全评定
油气管道
J integral
Finite element method
Crack
Failure assessment curve
Safety assessment
Pipelines
