碳纳米管增强镁基复合材料长径比对力学性能影响的有限元分析  

Finite Element Analysis of Mechanics Properties of Aspect Ratio of Carbon Nanotues Reinforced Magnesium Matrix Composite Material

作　　者：刘贵立[1] 杨忠华[1] 栗青[1] 

机构地区：[1]沈阳工业大学建筑工程学院

出　　处：《科学技术与工程》2010年第23期5630-5633,共4页Science Technology and Engineering

基　　金：国家自然科学基金项目(50671069)资助

摘　　要：建立复合材料中（镀铜）碳纳米管增强镁基复合材料空间轴对称分析模型,直接采用有限元法研究长径比对纳米复合材料的力学性能的影响。研究表明,长径比较高时,增强基应力集中程度较高,饱和应力范围较大,说明提高长径比可以提高应力传递效率,有利于增强基高弹性模量的发挥;随着长径比的提高,复合材料整体弹性模量增大,当长径比超过临界值后整体弹性模量趋于稳定;对于碳纳米管增强镁基复合材料,长径比临界值为45,弹性模量的临界值为49GPa。The axisymmetric analysis model of（copper）carbon nanotubes（CNTs）reinforced magnesium matrix composite material was built.The nanophase composite material mechanics properties of different aspect ration were investigated by finite element method creatively.It is shown that,the stress concentration of CNTs is higher and the scope of saturation stress is vaster when the aspect ratio is higher.It is expressed that the high aspect ratio can enhance the efficiency of stress transmission and can take advantage of CNTs high elasticity modulus well.The elasticity modulus of composite increases with increasing the aspect ratio of CNTs.For the CNTs/Mg composite material,the aspect ratio critical number is 45,and the elasticity modulus critical number is 49 GPa.

关 键 词：碳纳米管 镁基复合材料 长径比 有限元分析 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]