首页 | 本学科首页   官方微博 | 高级检索  
     检索      

动载下复合材料基体裂纹与夹杂相互作用的数值模拟
引用本文:刘陆广,欧卓成,段卓平,皮爱国,黄风雷.动载下复合材料基体裂纹与夹杂相互作用的数值模拟[J].应用力学学报,2011,28(2).
作者姓名:刘陆广  欧卓成  段卓平  皮爱国  黄风雷
作者单位:北京理工大学爆炸科学与技术国家重点实验室,100081,北京
基金项目:国家自然科学基金(10872035):爆炸科学与技术国家重点实验室(北京理工大学)开放课题
摘    要:采用ABAQUS软件及粘聚裂纹模型对动态拉伸载荷下复合材料中垂直于基体-夹杂界面的基体裂纹与夹杂的相互作用进行了数值模拟.结果表明:在给定的界面强度下,当加载率(或应变率)低于某一临界值(临界应变率)时裂纹将沿基体-夹杂界面扩展,当高于该临界值时裂纹可以穿过界面在夹杂中扩展.此外,随着界面强度的提高,临界应变率降低;当界面强度超过一定值后,裂纹扩展方向将不受外部载荷影响,裂纹将沿自相似方向扩展;当界面强度低于该临界值时,裂纹将沿界面扩展;并且临界应变率随夹杂尺寸的增大而降低,即小夹杂更难于破坏.上述结果可为前人的混凝土动态实验数据提供合理的细观理论解释.

关 键 词:临界应变率  沿夹杂  穿夹杂  复合材料  裂纹

Simulation of the interaction between matrix crack and inclusion in composites under dynamic loadings
Liu Luguang,Ou Zhuocheng,Duan Zhuoping,Pi Aiguo,Huang Fenglei.Simulation of the interaction between matrix crack and inclusion in composites under dynamic loadings[J].Chinese Journal of Applied Mechanics,2011,28(2).
Authors:Liu Luguang  Ou Zhuocheng  Duan Zhuoping  Pi Aiguo  Huang Fenglei
Institution:Liu Luguang Ou Zhuocheng Duan Zhuoping Pi Aiguo Huang Fenglei(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,100081,Beijing,China)
Abstract:Simulation of the interaction between the matrix-crack and the inclusion in a composite under dynamic tensile loadings is carried out in this paper by using the ABAQUS software based on the so-called Cohesive Crack Model.The numerical results show,for a given interface strength,that the crack deflects into and propagates along the inclusion when the loading-rate(or the strain-rate) is lower than a critical value(the critical strain-rate),otherwise the crack penetrates through the interface and propagates in...
Keywords:critical strain-rate  deflect along inclusion  penetrate through inclusion  
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号