非均匀复合材料中裂纹扩展过程的数值模拟  

Numerical Simulation on Crack Growing Process of Non-homogeneous Composite Materials

作　　者：戴耀[1] 孙长青[1] 谭伟[1] 张鹏[1] 

机构地区：[1]装甲兵工程学院机械工程系 装甲兵工程学院装备再制造工程系

出　　处：《装甲兵工程学院学报》2010年第2期66-69,共4页Journal of Academy of Armored Force Engineering

基　　金：国家自然科学基金资助项目(90305023;50574097)

摘　　要：应用有限单元法和最大正应力准则,引入楔形界面过渡层模型,求解相应的特征函数,准确地确定界面裂纹第一步开裂角,模拟了裂纹在非均匀复合材料中的扩展过程。结果表明:裂纹扩展初期呈波浪式前进,并最终沿着与最大正应力垂直的方向前进。这对此类结构的防断控制具有指导意义。Using the finite element method and maximum normal stress criterion,the wedge-shaped interface transition layer model is introduced. The first step opening angle of interfacial crack can be accurately determined through solving proper Eigenfunction. The crack growing process of non-homogeneous composite materials is simulated. The results show that the crack growth is basically wave-liked progressed along the direction vertical to the maximum normal stress,which is of significance for the fracture preventin...

关 键 词：界面裂纹 非均匀材料 裂纹扩展 楔形模型 有限单元法 

分 类 号：O346.1[理学—固体力学]