摘要
为了用界面层方法分析一般结构中的裂纹扩展问题,提出了广义界面层的概念.基于能量释放率G相等的原则,对界面层的本构关系进行了线弹性等效.在此基础上,重点推导了含Ⅰ型裂纹双悬梁(DCB)的载荷-位移函数,并借助Abaqus软件对双悬梁的分层问题进行数值模拟.理论推导和数值模拟的结果证明了广义界面层的线弹性等效是可行的.
In order to analyze the crack growth by the cohesive zone approach in a general structure,the concept of generalized cohesive interface is proposed.Based on the principle of the energy release rate and the linear elastic equivalence of the cohesive interface,the element＇s stiffness matrix is obtained.On this basis, the load/displacement function of the double cantilever beam（DCB） is obtained,under pure mode I condition. With the software BAQUS,the numerical simulation of delamination＇s growth is carried out.Analytic functions and numerical simulation＇s results show that the generalized linear elastic cohesive zone equivalence is valid.
出处
《力学与实践》
CSCD
北大核心
2010年第2期47-50,共4页
Mechanics in Engineering
关键词
广义界面层
能量释放率G
线弹性等效
分层
双悬臂梁(DCB)
generalized cohesive zone
energy release rate G
linear＆ elastic equivalent
delamination
double cantilever beam（DCB）
