双材料界面裂纹动态扩展的数值模拟  

NUMERICAL SIMULATION OF DYNAMIC CRACK GROWTH OF BIMATERIAL INTERFACE CRACKS

作　　者：赵鲁春[1] 张子威 李顶河[3] ZHAO LuChun;ZHANG ZiWei;LI DingHe(Shanghai Aircraft Design Research Institute,Shanghai 201210,China;Sino-European Institute of Aviation Engineering,Civil Aviation University of China,Tianjin 300300,China;College of Aeronautical Engineering,CAUC,Tianjin 300300,China)

机构地区：[1]上海飞机设计研究院,上海201210 [2]中国民航大学中欧航空工程学院,天津300300 [3]中国民航大学航空工程学院,天津300300

出　　处：《机械强度》2021年第5期1213-1220,共8页Journal of Mechanical Strength

摘　　要：基于扩展有限元方法(XFEM),研究了双材料中界面裂纹和亚界面裂纹的动态扩展问题。建立了双材料板界面裂纹和亚界面裂纹的动态增长分析模型,该模型使用集中质量矩阵代替传统的一致质量矩阵以提高效率,并利用Newmark法进行时间积分。将该模型与在有限元软件中建立的二维弹性模型计算获得的动力响应和能量值进行比较。通过数值算例,研究了应变率和材料特性对圆形和直线双材料中界面和亚界面裂纹扩展的影响。Based on the extended finite element method(XFEM),the dynamic propagation behaviors of interface cracks and sub interface cracks in bimaterials are studied.A dynamic growth analysis model of bimaterial plate with interface crack and sub interface crack is established.In this model,the centralized mass matrix is used to replace the traditional consistent mass matrix to improve the efficiency,and the Newmark method is used for time integration.This model is compared with the dynamic response and energy value calculated by the two-dimensional elastic model established in the finite element software.Through numerical examples,the effects of strain rate and material properties on the interface and sub interface crack growth in circular and linear bimaterials are studied.

关 键 词：动态扩展 界面裂纹 亚界面裂纹 扩展有限元法 

分 类 号：TB330.1[一般工业技术—材料科学与工程] V214.8[航空宇航科学与技术—航空宇航推进理论与工程]