空心微珠增强铝基复合材料弹塑性性能的模拟预测  

Micromechanics Finite Element Simulations of Aluminum-Cenospheres Composites

作　　者：罗燕[1] 龙文元[2] 潘美满[2] 万红[2] 

机构地区：[1]江西理工大学,江西赣州341000 [2]南昌航空大学材航空制造工程学院,江西南昌330069

出　　处：《铸造技术》2010年第11期1435-1438,共4页Foundry Technology

摘　　要：基于代表性体积元的细观力学有限元的方法预测空心微珠增强铝基复合材料的弹性模量、弹塑性应力应变。研究了空心微珠体积百分比(Vf)和空心微珠壁厚与空心微珠半径的比值(t/R)对弹塑性性能的影响。研究表明复合材料有效弹性模量随着Vf的增大而减小,随着t/R的增大而增大;另外,随着Vf的增加复合材料逐渐表现出泡沫金属材料的特性。The effective elastic modulus and elastoplastic stress-strain behavior of Aluminum-cenospheres composites are predicted by using the micromechanics finite element simulations on the base of representative volume element. It is investigated that how elastic-plastic properties of composites are affected by parameters of volume fraction of cenospheres（Vf）and the ratio of wall thickness to radius （t/R） . The results show that the effective elastic modulus of composites decrease with the increase of Vf and the decrease of t/R . It is also found that the behavior of the metallic foam is appeared with the increase of Vf.

关 键 词：复合材料 空心微珠 细观力学 弹塑性性能 

分 类 号：TB331[一般工业技术—材料科学与工程]