基于ANSYS/LS-DYNA开孔泡沫铝压缩及吸能性能的模拟  

Simulation of compression properties and energy absorption properties of open-cell aluminum foams based on ANSYS/LS-DYNA

作　　者：苏高峰 田克楠 王艳丽 游晓红[1] 王录才[1] Su Gaofeng;Tian Kenan;Wang Yanli;You Xiaohong;Wang Lucai(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Xinmi Vocational Education Center,Xinmi 452300,China;School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]新密市职教中心,河南新密452300 [3]中北大学材料与工程学院,山西太原030051

出　　处：《轻金属》2020年第7期40-46,共7页Light Metals

基　　金：山西省科技攻关项目(20140322-20);山西省科技攻关项目(201803D1-21004)。

摘　　要：通过建立简单立方模型模拟开孔泡沫铝,选用ANSYS/LS-DYNA软件分析孔隙率及孔径对开孔泡沫铝准静态压缩及吸能性能的影响。模拟分析表明开孔泡沫铝弹性模量和屈服强度均会随着孔隙率增大而降低,且孔隙率越高下降的幅度越大;随着孔径的增大,弹性模量的降幅相对较低,而屈服强度的降幅则相对较高;孔径相同,吸能效率和理想吸能效率的最大值在随孔隙率变化的过程中存在峰值,并非一直递增或递减,存有一个最优的孔隙率,可使这两参数达到最大,在本文中最优孔隙率为63%。In this paper,a simple cubic model was established to simulate the open-cell aluminum foams and the ANSYS/LS-DYNA software was used to analyze the influence of porosity and pore size on the quasi-static compression properties and energy absorption properties of open-cell aluminum foams.The simulation results show that the elastic modulus and yield strength of open-cell aluminum foam decrease with the increase of porosity,the higher the porosity,the more significant the decline is;with the increase of pore size,the decrease of elastic modulus is relatively low,while the decrease of yield strength is relatively high.Under the same pore size,there exist a peak value when the maximum of energy absorption efficiency and ideal energy absorption efficiency changes along with the variation of porosity.There is an optimal porosity,which maximizes the two parameters.In this paper,the optimal porosity is 63%.

关 键 词：开孔泡沫铝 弹性模量 屈服强度 吸能性 有限元模拟 

分 类 号：O341[理学—固体力学]