摘要
高级别管线钢的一大特点是韧度高,导致管材裂纹尖端周围经常处于大范围屈服状态,现有的基于高约束试件的断裂韧性测试方法,很难满足新型管材的断裂韧性测试要求.本文回顾了基于CTOD和CTOA的断裂韧度参数,详细介绍了管道钢断裂韧性测试方法的研究现状和发展趋势,分析了影响管道钢断裂韧性测试准确性的各种因素,为管道钢断裂韧性的测试提供帮助.
The high-level pipeline steel is characterized by high toughness, with a wide range of plastic yielding zone around the crack tip, the existing test methods are difficult to meet the requirements for determination of its fracture toughness by using low constraint specimens. This paper reviews two kinds of fracture parameters based on CTOD and CTOA, which can characterize the deformation state of the crack tip. The present research status and the development trend of these test methods are summarized. A variety of factors influencing the testing accuracy of the fracture toughness for the pipeline steels are analyzed, and suggestions are made to improve the experimental design for measuring the fracture toughness of pipeline steels.
出处
《力学与实践》
CSCD
北大核心
2012年第5期6-15,共10页
Mechanics in Engineering
基金
高等学校博士学科点专项科研基金资助项目(20100007110006)
关键词
油气管道
断裂韧度
测试方法
裂纹尖端张开位移
裂纹尖端张开角
pipeline steels
fracture toughness
testing method
crack tip opening displacement （CTOD）
cracktip opening angle （CTOA）
