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力学与实践 ›› 2010, Vol. 32 ›› Issue (2): 47-50.doi: 10.6052/1000-0879-2009-264

• 应用研究 • 上一篇    下一篇

线弹性广义界面层模型的研究

陈丽华1 徐元铭 高小青   

  1. 北京航空航天大学 航空科学与工程学院飞机所 北京 100191 北京航空航天大学 航空科学与工程学院飞机所 北京 100191
  • 收稿日期:2009-07-08 修回日期:1900-01-01 出版日期:2010-04-08 发布日期:2010-04-08

THE RESEARCH ON LINEAR & ELASTIC EQUIVALENCE OF THE GENERALIZED COHESIVE INTERFACE

  • Received:2009-07-08 Revised:1900-01-01 Online:2010-04-08 Published:2010-04-08

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.

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)

Abstract: 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.

Key words: Generalized cohesive zone, Energy release rate G, Linear& elastic equivalent, Delamination, Double cantilever beam(DCB)