含裂纹缺陷结构J积分计算方法研究

Research of cracked defect structure's J-integral computing methods

裂纹参量J积分一直是断裂力学领域研究的热点,它是定量描述裂纹尖端区域应力应变场强度的重要断裂参量。J积分的获取有多种方法,归纳总结了几种常用的含裂纹缺陷结构的J积分计算方法并对其进行分析,最后列举一实例进行计算,分析了各类方法的特点,为断裂参量J积分的研究以及计算提供参考。

Crack parameter J - integral has been a hot issue of fracture mechanics. It is an important fracture parameter which quantitatively describes the stress and strain fields near crack tip. There are varieties of methods to obtain J - integral. This paper summarizes several methods of calculating the J - integral of cracked defect structure and analyzes the re- suit. The paper cites an example at the end, and analyzes the characteristics of various methods, provides a reference for the future study and computing of J - integral.