颗粒几何特征对SiC颗粒增强Al基复合材料力学行为的影响  

Effect of particle geometrical characteristic on mechanical behavior of SiC particle reinforced aluminum matrix composites

作　　者：强华[1] 徐尊平[2] 

机构地区：[1]西南大学育才学院,重庆400715 [2]西南大学材料科学与工程学院,重庆400715

出　　处：《轻合金加工技术》2008年第10期46-49,共4页Light Alloy Fabrication Technology

摘　　要：利用有限元方法建立二维模型分析了不同外力下SiC颗粒形状及其尺寸对Al基复合材料力学行为的影响。结果表明,颗粒形状对材料的应力和应变分布的影响很大,颗粒尖角附近的应力和外力方向上基体相应位置的应变均有严重的集中现象。随颗粒角度的减小和外力的增大,颗粒的应力和基体的应变均很快增大。颗粒尺寸较小时,对颗粒的应力的影响小。A two-dimension of finite element model（FEM） was used to analyze the effect of particle with different shape and different size under different load on mechanical behavior of SiC particle reinforced aluminum composites. The results showed that the particle shape has great effect on stress and strain of composites. There are serious stress concentration in the particle comer and strain concentration in the matrix along the load. The stress and strain increase quickly with decreasing particle comer degree and with increasing the load. The particle size has little effect on stress of particle.

关 键 词：SIC颗粒 复合材料 数值模拟 

分 类 号：TB333[一般工业技术—材料科学与工程]