铝基BCH_(n)折纸超材料的材料参数优化与压缩特性研究  

Parameters optimization and compression characteristics analysis of aluminum-based BCH_(n) origami metamaterial

作　　者：华福祥 苏力争 叶靖 HUA Fuxiang;SU Lizheng;YE Jing

机构地区：[1]西安电子工程研究所,陕西西安710100

出　　处：《现代机械》2023年第3期98-102,共5页Modern Machinery

摘　　要：折纸超材料的轻量化、高吸能力学特性在过去几年受到广泛的关注,为了探讨折纸超材料的重要结构参数扇形角α在压缩过程中的变形及能量吸收的影响规律,通过数值仿真与试验验证相结合的方式,基于Isight软件优化BCH_(n)折纸超材料的材料参数,将AlSi10Mg的弹性模量从69 GPa修正到72.45 GPa,屈服强度从270 MPa优化到283.5 Mpa,使得优化后的超材料的最大初始支反力误差从15.7%优化到7%。使用优化后的材料参数通过有限元数值仿真结果表明,增大扇形角可以增大BCH_(n)折纸超材料的支反力、比吸能值,并且当扇形角大于60°以后时,支反力与比吸能值的增幅明显变大。In recent years,the lightweight and high energy-absorbing characteristics of the origami metamaterial have received widespread attention.In order to investigate the impact of the important structural parameter,sector angleα,on the deformation and energy absorption during compression,the material parameters of the BCH_(n) origami metamaterial were optimized through numerical simulation and experimental verification by using Isight software.The elastic modulus of AlSi10Mg was adjusted from 69 GPa to 72.45 GPa,and its yield strength was adjusted from 270 MPa to 283.5 MPa,reducing the maximum initial bearing reaction force error of the optimized metamaterial from 15.7%to 7%.Finite element numerical simulation was carried out based on the optimized material parameters,and the results showed that increasing the sector angle could enhance the bearing reaction force and the specific energy absorption value of the BCH_(n) origami metamaterial.When the sector angle was beyond 60°,the increase of the bearing reaction force and the specific energy absorption became more significant.

关 键 词：折纸结构 超材料 压缩特性 参数优化 

分 类 号：TH123[机械工程—机械设计及理论]