Research on failure criterion of composite based on unified macro- and micro-mechanical model  

作　　者：Sun Zhigang Zhao Long Chen Lei Song Yingdong 

机构地区：[1]College of Energy and Power Engineering and State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics

出　　处：《Chinese Journal of Aeronautics》2013年第1期122-129,共8页中国航空学报（英文版）

基　　金：co-supported by National Basic Research Program of China, National Natural Science Foundation of China(No. 51075204);Aeronautical Science Foundation of China (No.2009ZB52028, No. 2012ZB52026);Research Fund for the Doctoral Program of Higher Education of China (No. 20070287039);NUAA Research Funding (No. NZ2012106)

摘　　要：A new unified macro- and micro-mechanics failure analysis method for composite structures was developed in order to take the effects of composite micro structure into consideration. In this method, the macro stress distribution of composite structure was calculated by commercial finite element analysis software. According to the macro stress distribution, the damage point was searched and the micro-stress distribution was calculated by reformulated finite-volume direct averaging micromechanics （FVDAM）, which was a multi-scale finite element method for composite. The micro structure failure modes were estimated with the failure strength of constituents. A unidirectional composite plate with a circular hole in the center under two kinds of loads was analyzed with the traditional macro-mechanical failure analysis method and the unified macro- and micro-mechanics failure analysis method. The results obtained by the two methods are consistent, which show this new method＇s accuracy and efficiency.A new unified macro- and micro-mechanics failure analysis method for composite structures was developed in order to take the effects of composite micro structure into consideration. In this method, the macro stress distribution of composite structure was calculated by commercial finite element analysis software. According to the macro stress distribution, the damage point was searched and the micro-stress distribution was calculated by reformulated finite-volume direct averaging micromechanics （FVDAM）, which was a multi-scale finite element method for composite. The micro structure failure modes were estimated with the failure strength of constituents. A unidirectional composite plate with a circular hole in the center under two kinds of loads was analyzed with the traditional macro-mechanical failure analysis method and the unified macro- and micro-mechanics failure analysis method. The results obtained by the two methods are consistent, which show this new method＇s accuracy and efficiency.

关 键 词：COMPOSITE Finite-volume direct averaging micromechanics Mechanics failure model Multi-scale finite element Unified macro and micro 

分 类 号：V214.8[航空宇航科学与技术—航空宇航推进理论与工程]