摘要
基于Tandon和Weng(1988)建立的理论框架,应用细观力学方法,本文提出了非圆截面纤维增强复合材料的弹塑性理论。对于两种复合材料,即单向排列纤维形成的正交各向异性材料和在截面内随机排列纤维形成的横观各向同性材料,作出了割线模量,基体应力增大系数及屈服条件曲线。通过各种截面纤维之间的比较,得出结论:在横观各向同性材料情况下,片状纤维增强材料的力学性能优于其它材料。
Based on the framework of Tandon and Weng, the elasto-plastic theory of an orthotropic composite reinforced with unidirectionally-elliptic aligned cylinders,and a transversely isotropic composite reinforced with two-dimentional randomly-oriented elliptic cylinders, is established.The secant moduli yield surfaces and the average stress concentration factors of the matrix are derived. It is shown that both the secant moduli and the yield surfaces are strongly influenced by the shape of fibers;ribbons are seen to be most effective in transversly isotropic composite.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1993年第1期109-119,共11页
Acta Materiae Compositae Sinica
关键词
复合材料
弹塑性
纤维增强
fiber
micromechanics
yield surface
secant moduli
