裂纹扩展阻力曲线
材料科学
应变能释放率
消散
裂缝闭合
有限元法
断裂力学
脆性
增长率
复合材料
断裂(地质)
机械
结构工程
数学
几何学
热力学
工程类
物理
作者
Wenjian Xu,Yu Ren,Si Xiao,Bin Liu
标识
DOI:10.1016/j.jmps.2023.105447
摘要
The concept of energy release rate proposed by Griffith originally used for elastic brittle material was extended for ductile material by Irwin and Orowan using the sum of the surface energy and the work of plastic dissipation as fracture resistance. This fracture resistance, however, depends on the load type and specimen geometry, which hinders its wide application. In contrast, in this paper, a finite crack growth energy release rate is proposed by assuming a finite crack growth, which is conveniently applicable to finite element analysis. The effect of the plastic dissipation on the crack growth is considered in the driving force. Elastic-plastic finite element analysis is used to apply the present energy release rate. Compared to the experiment results, it is shown that for a fixed finite crack growth, a constant critical energy release rate can well predict the stable crack growths and residual strengths of sheets with single and various collinear cracks subjected to different types of loads. The present finite crack growth energy release rate is conceptually simple, has a solid physical foundation, and would be appealing for ductile crack growth analysis.
科研通智能强力驱动
Strongly Powered by AbleSci AI