大变形条件下短纤维增强橡胶基复合材料的力学行为

Mechanical behaviors of short fiber reinforced rubber matrix composite on large deformation

建立了短纤维增强橡胶基复合材料(SFRC)的细观代表体元,数值模拟了大变形条件下材料的力学行为。研究了纤维体积分数、界面厚度以及界面相性质对SFRC力学性能的影响。结果表明:大变形条件下SFRC的力学性能随纤维体积分数的增加有显著改善;相同体积分数前提下,界面越厚,SFRC的力学性能越好;纤维、界面与基体弹性模量的等差过度有利于减小纤维在界面附近的应力集中。

A micro-representative volume element of short fiber reinforced rubber matrix composite（ SFRC） was established.The mechanical behaviors of SFRC on large deformation were investigated by numerical simulation.The effects of fiber volume fraction,interface thickness and interface properties on mechanical performances of SFRC were studied.The results indicated that the mechanical performances of SFRC were significantly improved with the increase of the fiber volume fraction. Under the same fiber volume fraction,the larger the thickness of the interface,the better the performances of SFRC. The arithmetical transition of the elastic moduli of the fiber,the interphase and the matrix was beneficial to decreasing the stress concentration.