短纤维增强金属基复合材料界面微塑性变形区的研究  

Research of Interface Micro Plastic District in Short Fiber Reinforced Metal Matrix Composites

作　　者：吴晶[1] 李文芳[2] 

机构地区：[1]广东交通职业技术学院机电控制系,广东广州510650 [2]华南理工大学材料科学与工程学院,广东广州510641

出　　处：《新技术新工艺》2011年第5期63-66,共4页New Technology & New Process

基　　金：国家自然科学基金资助项目(19972021)

摘　　要：建立了包括金属基复合材料增强体短纤维体积比、长径比、热残余应力、外载作用及短纤维相互扰动应力等的微塑性变形区细观力学模型,分析了外载、热残余应力、短纤维长径比等对微塑性变形区尺寸范围的影响,并结合不同短纤维长径比的复合材料微屈服试验,分析了材料微塑性变形区与微屈服强度的关系。结果表明,材料微屈服强度受微塑性变形区的尺寸范围、位错密度等多种因素的综合影响。This paper analyzed the interface micro plastic district in the short fiber reinforced MMCS.The micromechanics model was established with the short fiber volume fraction,aspect ratio,thermal residual stress,external load and mutual perturbation stress in short fiber.The influence of external load,thermal residual stress,fiber aspect ratio on the size of micro-plastic district was calculated.The relationship between micro plastic district and the micro yield strength was analyzed through micro-yield experiments and micromechanics calculation.The results show that the micro plastic district affects the micro-yield strength with the dislocation density and size,and so on.

关 键 词：位错 微观力学 微塑性 

分 类 号：TB330.1[一般工业技术—材料科学与工程]