摘要
高压、富气的输送管道需要管道钢裂纹尖端张开角（CTOA）的测试方法。采用三维有限元方法模拟了高钢级CTOA试件的断裂扩展过程。（CTOA）c的有限元计算值与试验实测值的偏差为10.38%~17.5%,且管线钢的（CTOA）c随试件厚度的增加而增大,并呈线性关系。基于对有限元计算结果的分析,拟合得到了管线钢（CTOA）c的预测公式。
High pressure,rich gas transmission pipeline requires the development of measuring method of Crack Tip Opening Angle（CTOA）.The simulation of high-grade pipeline steel CTOA specimen fracture process has been carried out with the 3D finite element method.The results showed that the deviations of the finite elements calculation values and the experimental values of the（CTOA）c are 10.38%~17.5%,and the pipeline steel（CTOA）c is increased with specimen thickness increased,and they have linear relation.The fitting predicted formulas of pipeline steel（CTOA）c were acquired by analyzing results of finite elements calculation.
出处
《压力容器》
北大核心
2011年第6期16-19,共4页
Pressure Vessel Technology
关键词
裂纹尖端张开角
三维有限元
公式拟合
止裂
crack tip opening angle
3D finite element
fitting formula
arrest
