摘要
针对金属泡沫材料的多孔结构,采用有限元仿真的方法建立了刚性压头与金属泡沫材料间的基础力学模型,通过仿真的方法研究了金属泡沫材料的力学性能影响因素。获得微孔直径和孔隙率对金属泡沫材料的弹性模量和硬度的影响规律。研究表明,在保持孔隙率不变的情况下,随着微孔直径的增加,金属泡沫材料的硬度呈增大的趋势,但微孔直径对泡沫材料的弹性模量影响较小,可忽略不计。在保持微孔直径不变的情况下,随着孔隙率的增加,金属泡沫材料的硬度和弹性模量呈减小的趋势。孔隙率对金属泡沫的力学性能影响较大,通过改变孔隙率可以实现对金属泡沫材料的硬度和弹性模量进行控制。
Based on the porous structure of metal foam material, the basic mechanical model between rigidpressure head and metal foam material is established by finite element simulation method.The influence factorsof mechanical properties of metal foam material are studied by means of simulation method.The effects ofmicropore diameter and porosity on the elastic modulus and hardness of metal foams were obtained.The resultsshow that the hardness of metal foams increases with the increase of micropore diameter, but the influence ofmicropore diameter on the elastic modulus of foamed materials is small and negligible.With the increase ofporosity, the hardness and elastic modulus of metal foams decrease.Porosity has a great influence on themechanical properties of metal foams.Hence, the hardness and elastic modulus of metal foams can be controlledby changing porosity.
作者
关兴举
GUAN Xingju(School of Electromechanical and Automotive Technology,Jilin Vocational College of Industry and Technology,Jilin 132013,China)
出处
《技术与教育》
2018年第3期28-32,共5页
Technique & Education
基金
2014年度吉林省教育厅"十二五"科学技术研究项目"基于CATIA软件二次开发的汽车焊接夹具专用设计模块研发"(项目编号:吉教科合字[2014]第583号)的阶段性研究成果之一
关键词
金属泡沫材料
有限元
力学行为
弹性模量
硬度
metal foaming material
finite element
mechanical behavior
elastic modulus
hardness
