机械科学与技术2017，Vol.36Issue(10)：1542-1549,8.DOI:10.13433/j.cnki.1003-8728.2017.1010
相似理论在泡沫铝冲击吸能过程的应用分析
Analysis of Impact Energy Absorption for Foam Aluminum Components based on Similarity Theory
摘要
Abstract
To solve the problems that the large aluminum foam element entity impact test cost is higher and the numerical simulation computation is larger,based on the similarity theory,the large and small models for three types,including a frustum of cone type,four trustum of a pyramid type and six trustum of a pyramid type of aluminum foam elements were respectively established at the geometry size ratio of 3:1,the energy absorption similarity ratio in the impact process of large and small models were deduced via dimensional analysis.Finite element simulation via large and small models were proceeded and the entity impact tests of small models were applied.The results show that the energy absorption of small models between the entity tests and the finite element method results has little errors,verifying that LS-DYNA finite element method is feasible in axial impact process of aluminum foam.The energy absorption ratios between the large and small models in finite element simulation are respectively of 26.51,27.18,26.73,in accordance with the ratio 27:1 derived from the dimensional analysis,the results show that it's feasible to analyze the energy absorption characteristic of foam aluminum components under the axial impact condition based on similarity theory.关键词
泡沫铝/相似理论/有限元仿真/冲击试验/吸能特性Key words
aluminum foam/similarity theory/finite element emulation/impact test/characteristic of energy absorption分类
机械制造引用本文复制引用
王春华,刘影..相似理论在泡沫铝冲击吸能过程的应用分析[J].机械科学与技术,2017,36(10):1542-1549,8.基金项目
国家自然科学基金项目(51374120)资助 （51374120）
