Parameter studies and evaluation principles of delamination damage in laminated composites

作     者：Kangkang WANG Libin ZHAO Haiming HONG Jianyu ZHANG Yu GONG Kangkang WANG;Libin ZHAO;Haiming HONG;Jianyu ZHANG;Yu GONG

作者机构：School of AstronauticsBeihang UniversityBeijing 100083China Shenyang Aircraft Design and Research InstituteShenyang 110035China College of Aerospace EngineeringChongqing UniversityChongqing 400044China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2021年第34卷第7期

页      面：62-72页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：The research work is supported by the National Science Foundation of China(Nos.11572058 11772028 11872131 and U1864208) 

主　　题：Analytical model Composite Delamination Evaluation principles Parameter study 

摘      要：Delamination represents one of the most severe failure modes in composite laminates,especially when they are subjected to uniaxial compression *** evaluation of the delamination damage has always been an essential issue of composite laminates for durability and damage tolerance in engineering *** on the most typical and representative elliptical delamination issue,an analytical model simultaneously considering the conservative buckling process and non-conservative delamination propagation process is *** computational cases considering different delamination depths,directions,aspect ratios,and areas are established,and the predicted results based on the analytical model are carefully *** of these geometrical delamination parameters on the buckling,delamination propagation,and failure behaviors of composite laminates are thoroughly analyzed,and innovative evaluation principles of the delamination damage have been *** is found that the delamination area is the key factor that truly affecting the failure behaviors of delaminated composites,and the local/global buckling and failure loads show clear linearity with the delamination area,whilst the delamination depth and direction only have slight effects.