界面弹塑性对原位SiC_p/7075Al复合材料弹性模量影响的数值分析  

Numerical Analysis about the Effect of Interface Elasticity-Plasticity on Elastic Modulus of SiC_p/7075Al In-situ Composite

作　　者：黄绡咏 吴卫国[1] 陈琳[1] 

机构地区：[1]江苏大学土木工程与力学学院,镇江212013

出　　处：《材料导报》2015年第10期143-147,共5页Materials Reports

基　　金：镇江市科技攻关项目(GY2013032;GY2013052)

摘　　要：界面把载荷从基体传递到增强体是复合材料弹性变形阶段的重要强化机制.应用ABAQUS有限元软件模拟分析了界面弹塑性对原位SiCp/7075Al复合材料弹性模量的影响规律,结果表明：界面与基体所需的模量比值与颗粒体积分数有关,并不局限于20％～30％;随着界面弹性模量的增大,基体塑性变形量增大,复合材料塑性性能变差;颗粒体积分数大时,界面/基体模量比取满足增强效果的最小值即可;颗粒体积分数越大,界面性能对复合材料的弹性模量的影响越显著,界面弹塑性比基体弹塑性对复合材料弹性模量的影响更明显,并且界面弹塑性会明显地降低颗粒体积分数比较大的复合材料的弹性模量.The transmission of load from the matrix to the reinforcement body by interface is an important strengthening mechanism in elastic deformation stage of composites. The effect of elastic-plastic interface on elastic modulus of SiCp/7075A1 in-situ composite was analyzed by ABAQUS finite element program, and it was concluded that the required interface to matrix modulus ratio depends on the particle volume fraction, but not limited to 20%-- 30%. With the increase of interracial elastic modulus, matrix plastic deformation increased and plastic performance of composite materials turned worse. In high particle volume fraction, the interface/matrix modulus ratio should satisfy the minimum enhancement effect. The larger the particle volume fraction, the greater the effect of interface perfor- mance on composite modulus. The elasticity-plasticity of interface affected the composites modulus more remarkably than the matrix did, and it could significantly reduce the elastic modulus of the composite with high particle volume fraction.

关 键 词：界面弹塑性 复合材料弹性模量 颗粒体积分数 

分 类 号：TB331[一般工业技术—材料科学与工程]