摘要
用能量泛函变分问题的理论分析了断裂问题,建立了非线性固体的任意元素的边界变分定理,即裂纹扩展时,处于动力平衡状态的条件。由此可以求得动态裂纹扩展时,沿裂纹边界的能量释放量和能量释放率(动态纹裂扩展力)。
Fracture problems are analysed with the Variational problem of energy functional and the boundary Variational theorem of an arbitrary element for nonlinear solids is established, i.e. the equilibrium condition on the dynamics for the crack extension. Based on the boundary Variational theorem, the energy release quantity and energy release rate (dynamical crack extension force) along the crack bounndary are obtained.
出处
《北京工业大学学报》
CAS
CSCD
1991年第2期1-8,共8页
Journal of Beijing University of Technology
关键词
固体
非线性
断裂
裂纹
能量释放率
the Variational problem of variable boundary, e.nergy release quantity, energy release rate
