摘要
在Eshelby等效夹杂方法和双夹杂模型等的基础上建立了细观力学模型,定量计算了短纤维增强金属基复合材料的微屈服行为,计算结果表明:在基体材料的微屈服行为符合Brown-Lukens线性规律的情况下,复合材料的σ-〈ε~p〉^(1/2)也近似符合Brown—Lukens规律,同时,计算了增强体短纤维的含量、形状、热残余应力和位错密度诸因素对复合材料微屈服规律的影响。
The microyield behavior of the short fiber reinforced metal matrix composite (MMC) is computed by micromechanics model based on the Eshelby's equivalent method and double-inclusion model. The result shows that the MMC's microyield behavior accords with Brown-Luken's relation approximately if the matrix material obeys Brown-Luken's relation. The MMC's microyield strength is lower than that of the matrix material. The effect of fiber volume fraction, fiber aspect ratio and density of dislocation on the process of MMC's microyield are studied quantitatively.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第7期761-766,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金19972021
关键词
金属基复合材料
短纤维
微屈服
细观力学
metal matrix composite (MMC)
short fiber
microyield
micromechanics
