复合材料π接头渐进失效分析  

Progressive failure analysis on composite π joint

作　　者：陈珅艳[1] 林志伟[1] MOHAMED Yasser Mahmoud 黄海[1] 梁宪珠[2] 

机构地区：[1]北京航空航天大学宇航学院,北京100191 [2]中国航空工业第一集团公司北京航空制造工程研究所,北京100024

出　　处：《计算机辅助工程》2011年第3期19-24,共6页Computer Aided Engineering

摘　　要：针对复合材料π接头复杂的失效形式,采用材料刚度退化的方法模拟结构的渐进失效过程.用Abaqus建立某复合材料π接头的三维有限元模型;采用三维Hashin失效准则和Ye分层准则判别复合材料层合板的5种失效形式,将理想弹塑性材料模型应用于胶层材料来模拟胶层材料的失效,在Abaqus中建立考虑复合材料层合板和胶层失效的分析子程序;在子程序中,定义6个场变量代表纤维拉伸破坏、纤维屈曲、基体拉伸开裂、基体压缩开裂、分层失效和胶层失效等6种失效形式.在递增的拉伸载荷作用下对所建模型进行失效分析,结果表明该方法能有效地对复合材料π接头进行初始失效位置及载荷的判别和最终失效预测.As to the complex failure modes of composite π joint,the progressive failure procedure of a structure is simulated by material stiffness degradation method.The 3D finite element model of a composite π joint is established by Abaqus;five failure modes of composite laminates are differentiated by using 3D Hashin failure criteria and Ye-delamination criterion,an elastic-perfectly plastic material model is applied to adhesive material to simulate the adhesive failure,and a progressive failure analysis subroutine considering both the composite laminates and adhesive failures is developed in Abaqus,in which six field variables are defined to represent different failure modes： fiber tensile failure,fiber buckling,matrix tensile cracking,matrix compression cracking,delamination failure and adhesive failure.The failure analysis is performed on the model under given increasing tensile loads,and the results show that the method is effective in predicting initial failure position,initial failure load and final failure load for composite π joint.

关 键 词：复合材料 π接头 渐进失效分析 Hashin准则 Ye分层准则 胶层失效 ABAQUS 

分 类 号：TB332[一般工业技术—材料科学与工程]