异面冲击下金属蜂窝结构平均塑性坍塌应力模型  

Average plastic collapse stress model of metallic honeycomb structure under out-of-plan impact load

作　　者：赵国伟[1] 白俊青[1] 祁玉峰[2] 陈景春[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100191 [2]北京空间飞行器总体设计部,北京100094

出　　处：《振动与冲击》2016年第12期50-54,共5页Journal of Vibration and Shock

基　　金：中央高校基本科研业务费项目资助

摘　　要：在已有的蜂窝结构静态平均塑性坍塌应力理论模型和Cowper-Symonds本构模型的基础上,考虑应变强化效应和双壁厚黏结层,建立了在异面冲击载荷下的金属蜂窝结构平均塑性坍塌应力理论模型。使用LS-DYNA动力学软件模拟了铝合金蜂窝结构在冲击载荷作用下的异面变形,采用仿真和实验数据对理论模型进行了对比验证。结果表明:应用所建立的平均塑性坍塌应力理论模型能够更准确地计算金属蜂窝结构在异面冲击载荷下的平均塑性坍塌应力。Based on the theoretical calculation model of a honeycomb structure with static plastic collapse stress and Cowper-Symonds model,a metallic honeycomb structure collapse theory model is established under an impact load with consideration of the strain-hardening effect and the double wall thickness of an adhesive layer.The dynamics of an aluminum alloy honeycomb structure with out-of-plan deformation and under an impact load is simulated using LS-DYNA software.The results show that the plastic collapse theory model can more accurately predict the plastic collapse stress of a honeycomb structure under out-of-plane impact loading by comparing it with a simulation and experimental data.

关 键 词：蜂窝结构 塑性坍塌 异面冲击 应变强化效应 

分 类 号：V414[航空宇航科学与技术—航空宇航推进理论与工程]