复合材料科学与工程Issue(2)：5-12,8.DOI:10.19936/j.cnki.2096-8000.20240228.001
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
摘要
Abstract
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 10 000 N,the probability of structural failure is less than 0.000 17,and when the external load reaches 12 700 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Key words
honeycomb sandwich structure/compression after impact/neural network/reliability/sensitivity/composites分类
通用工业技术引用本文复制引用
李洪年,石强斌,王轩,邹润文,张峰..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[J].复合材料科学与工程,2024,(2):5-12,8.基金项目
国家973计划项目(20014CB046200) （20014CB046200）
天津市科技计划项目(20YDTPJC00380) （20YDTPJC00380）
中央高校基本科研业务费项目中国民航大学专项(3122019099) （3122019099）
