泡沫铝填充薄壁铝合金多胞板与单胞板吸能性能研究  

STUDY ON ENERGY ABSORPTION PERFORMANCE OF THIN-WALLED ALUMINUM ALLOY MULTI-CELL PLATE(MCP)AND SINGLE-CELL PLATE(SCP)FILLED WITH ALUMINUM FOAM

作　　者：李显辉 李文博 朱翔[3] 王蕊[1] 杜永峰[2] 李铁英[1] LI Xian-hui;LI Wen-bo;ZHU Xiang;WANG Rui;DU Yong-feng;LI Tie-ying(College of Civil Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Institute of Earthquake Prevention and Disaster Reduction,Lanzhou University of technology,Lanzhou,Gansu 730050,China;School of Electric Power,Civil Engineering and Architecture,Shanxi University,Taiyuan,Shanxi 030031,China)

机构地区：[1]太原理工大学土木工程学院,山西太原030024 [2]兰州理工大学防震减灾研究所,甘肃兰州730050 [3]山西大学电力与建筑学院,山西太原030031

出　　处：《工程力学》2023年第11期244-256,共13页Engineering Mechanics

基　　金：国家自然科学基金项目(51778276,11802166);山西省科技厅应用基础研究计划项目(202103021223022);山西省教育厅高校科技创新项目(2020L0052)。

摘　　要：为研究泡沫铝填充薄壁铝合金多胞板(MCP)与单胞板(SCP)的吸能能力,该文设计了6种不同截面的泡沫铝填充薄壁铝合金多胞板与1种单胞板,并基于非线性有限元软件LS-DYNA建立了相应的数值模型。对经典铝合金板耐撞击试验及泡沫铝夹芯板耐撞击试验进行了数值模拟,分析表明该数值模型能较好的模拟泡沫铝夹芯板在冲击过程中的撞击力、挠度和变形形态。基于此模型对比研究了不同因素下多胞板与单胞板的吸能特性,分析了其破坏模式和吸能机理,最后通过正交试验的方法分析了不同因素下的吸能效率以及多胞板最优截面类型的选取。结果表明:在面外冲击作用下,泡沫铝填充薄壁铝合金板的破坏模式为对称圆锥式破坏,冲击力-位移曲线和变形图显示其变形过程分为两个阶段:弹塑性变形阶段和回弹阶段;在发生相同位移时,18种不同参数的多胞板,其吸收的总能量(E)和比吸能(SEA)相对于单胞板都提高了400%以上,是一种更具吸能特性的板,可广泛应用于防护工程。To study the energy absorption capacity of different aluminum foam-filled thin-walled aluminum alloy multi-cell plate(MCP)and single-cell plate(SCP),six kinds of aluminum foam-filled thin-wall aluminum alloy multi-cell plate and one kind of single-cell plate were designed in this study,and the numerical models of MCP and SCP were established upon nonlinear finite element software LS-DYNA.The impact resistance test of the classic aluminum alloy plate and the impact resistance test of the aluminum foam sandwich plate are simulated numerically.The analysis shows that:the numerical model established can better simulate the impact force,the deflection and deformation of the aluminum foam sandwich plate during the impact process.Based on this model,the energy absorption characteristics of aluminum foam-filled thin-walled aluminum alloy MCP and SCP under different factors were compared and studied,and the failure mode and energy absorption mechanism were analyzed.Finally,the energy absorption efficiency under different factors and the selection of optimal section type of multi-cell plate were analyzed by orthogonal tests.The results show that the failure mode of aluminum foam-filled thin-wall aluminum alloy plates is symmetric conical failure under out-of-plane impact.Both structures have two stages:elastic-plastic deformation stage and spring-back stage.Under the same displacement,the total energy(E)and specific energy absorption(SEA)of the MCP with 18 different parameters are increased by more than 400%compared with that of the SCP,which is a plate with more energy absorption characteristics and can be widely used in protection engineering.

关 键 词：多胞板 落锤冲击 破坏模式 吸能特性 最优截面 

分 类 号：TG146.21[一般工业技术—材料科学与工程]