摘要
为分析复杂结构在复杂荷载作用下的断裂力学问题,基于结构断裂分析中的三维虚拟裂纹闭合技术(virtual crack closure technique,VCCT),应用ABAQUS有限元软件中的UEL编写了裂纹尖端接口单元程序,该接口单元无需后处理即可直接得到裂纹尖端的应变能释放率。用该方法计算了两个三维算例,并将计算结果与解析解进行了比较,结果与解析解吻合较好,证明所提方法具有较高精度和可靠性,为分析复杂结构的断裂力学问题提供了很好的思路和工具。
In order to analyze fracture mechanics issues of complicated structure under complex loading condition,based on the virtual crack closure technique（VCCT） in structure facture analysis,a program of interface element were compiled using user define element（UEL） in ABAQUS.Without any post-processing,the interface element can directly output the strain energy release rate at crack tip.Two 3D examples are calculated by the presented method and the results are well consistent with that of analytical solutions,verifying the high accuracy and reliability of the presented method.It provides an excellent tool and ideas for analyzing problems of complicated structure in fracture mechanics.
出处
《人民长江》
北大核心
2013年第13期47-50,共4页
Yangtze River
基金
国家自然科学基金资助项目(51269007)
关键词
虚拟裂纹闭合技术
应变能释放率
应力强度因子
断裂单元
virtual crack closure technique
strain energy release rate
stress intensity factor
crack element
