机械科学与技术2017，Vol.36Issue(5)：798-804,7.DOI:10.13433/j.cnki.1003-8728.2017.0523
泡沫铝材料参数反求及其填充锥形薄壁管的吸能性能研究
Research on Energy Absorbed Prosperity of Aluminum Foam and Material Parameter Identification of Foam-filled Taper Thin-walled Tube
摘要
Abstract
In order to study the mechanical properties of a commercial aluminum foam and simulate its filling structure.The material parameters of aluminum foam and alloys are identified based on the material quasi-static compression experiments and material constitutive model.The identified results are validated by using the experiment data.Then,as the composite structure,the parameter analysis of the foam-filled tube is conducted,such as thickness,cone angle and foam density.The finite element code LS-DYNA is used to study effect of these factors on the energy absorbed prosperity of foam-filled taper thin-walled tube via virtual test.The results show that the identification method can obtain the accurate material parameters,aluminum-foam density and tube thickness are the main factors on the average force and easier to control the energy absorption than that via cone angle.Through the computer simulation,the tube thickness is the main factor for influencing the initial peak force.The filling of aluminum foam can not only improve the thin-walled tube's deformation mode,increase the specific energy absorption,but also has few influence on the initial peak force.The present results can provide the reference for the structural design of energy absorber such as automobile energy absorption box.关键词
泡沫铝/薄壁锥形管/材料参数反求/吸能Key words
aluminum foam/taper thin-walled tube/material parameter identification/energy absorption分类
通用工业技术引用本文复制引用
黄晶,龙永程,曹娇,胡林..泡沫铝材料参数反求及其填充锥形薄壁管的吸能性能研究[J].机械科学与技术,2017,36(5):798-804,7.基金项目
国家自然科学基金项目(11202077,51475048)与湖南省自然科学基金项目(14JJ3060)资助 （11202077,51475048）
