含孔复合材料层合板的应力集中分析  

Stress concentration of composite laminates with circle hole

作　　者：卿光辉[1] 王绍波 QING Guanghui;WANG Shaobo(College of Aeronautical Engineering,CAUC,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院

出　　处：《中国民航大学学报》2019年第5期55-59,共5页Journal of Civil Aviation University of China

摘　　要：由于复合材料层合板壳结构力学行为的特殊性,目前还没有计算含孔结构应力集中系数的精确解。因此,通常采用试验或有限元精细网格模型等数值方法来分析此类问题。基于增强应变理论,从广义H-R变分原理出发,提出一种新的非协调广义混合元列式。然后建立了非协调广义混合模型,计算含孔复合材料层合板的应力集中系数。数值结果表明,非协调广义混合模型所得应力结果精度高、可靠性好,具有广泛的适用性。Due to the unique mechanical behavior of composite laminated plates and shells,there is no exact solution for calculating the stress concentration factors of such structures.Therefore,test or finite element model of the fine mesh are usually used to analyze this kind of problem.Based on the enhanced strain theory and the generalized H-R variational principle,a new noncompatible generalized mixed formulation is proposed.And then,a nonconforming generalized mixed model is established for the stress concentration factor analysis of composite laminates with holes.Numerical results show that the stress obtained by noncompatible generalized mixed finite element model has higher precision,stronger reliability and wider applicability.

关 键 词：复合材料 广义H-R变分原理 非协调广义混合元 应力集中系数 

分 类 号：V257[一般工业技术—材料科学与工程] O343.4[航空宇航科学与技术—航空宇航制造工程]