复合材料蜂窝夹芯结构低速冲击后压缩强度的可靠性与灵敏度分析  

Reliability and sensitivity analysis of compressive strength after low-speed impact for composite honeycomb sandwich structure

作　　者：李洪年 石强斌 王轩[2] 邹润文 张峰[3] LI Hongnian;SHI Qiangbin;WANG Xuan;ZOU Runwen;ZHANG Feng(Shanghai Aircraft Design and Research Institute,Commercial Aircraft Corporation of China Ltd.,Shanghai 201210,China;College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China;College of Mechanics,Civil Engineering and Architecture,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]中国商用飞机有限责任公司上海飞机设计研究院,上海201210 [2]中国民航大学航空工程学院,天津300300 [3]西北工业大学力学与土木建筑学院,西安710072

出　　处：《复合材料科学与工程》2024年第2期5-12,共8页Composites Science and Engineering

基　　金：国家973计划项目(20014CB046200);天津市科技计划项目(20YDTPJC00380);中央高校基本科研业务费项目中国民航大学专项(3122019099)。

摘　　要：建立了一种复合材料蜂窝夹芯结构低速冲击后压缩强度的可靠性与灵敏度分析方法。利用ABAQUS有限元分析软件和VUMAT子程序建立了蜂窝夹芯结构冲击后压缩渐进损伤失效分析模型,并通过试验验证模型的有效性;在此基础上,利用Python语言对模型中材料力学性能和面板厚度、蜂窝芯子厚度进行参数化;采用径向基神经网络代理模型替代渐进损伤失效分析模型;基于蒙特卡洛法进行冲击后压缩强度的可靠性分析;分别采用基于方差和基于失效概率的方法进行参数的灵敏度分析,并研究参数的变异系数对结构可靠性的影响。结果表明:在外载荷低于10000 N,结构失效概率小于0.00017的情况下,当外载荷达到12700 N时,结构失效概率达到0.9;面板的力学性能、面板厚度、蜂窝芯厚度对冲击后压缩强度的影响较大;冲击后压缩强度的变异系数随着参数变异系数的增大而增大。A reliability and sensitivity analysis method of compressive strength of composite honeycomb sandwich structure after low-speed impact is established.The progressive damage failure analysis model of composite honey-comb sandwich structure is established by using ABAQUS finite element analysis software and VUMAT subroutine,and the effectiveness of the model is verified by experiments.On this basis,the material mechanical properties,panel thickness and honeycomb core thickness in the model are parameterized by Python language.The radial basis function neural network agent model is used to replace the progressive damage failure analysis model.The reliability analysis of compressive strength after impact is carried out based on Monte Carlo method.The methods based on va-riance and failure probability are respectively used to analyze the sensitivity of parameters,and the influence of vari-ation coefficient of parameters on structural reliability is studied.The results show that when the external load is less than 10000 N,the probability of structural failure is less than 0.00017,and when the external load reaches 12700 N,the probability of structural failure reaches 0.9.The mechanical properties of the panel,the thickness of the panel and the thickness of the honeycomb core have a great influence on the compressive strength after impact.The coefficient of variation of compressive strength after impact increases with the increase of the coefficient of variation of parameter.

关 键 词：蜂窝夹芯结构 冲击后压缩 神经网络 可靠性 灵敏度 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]