摘要
受生物体构件的启发，提出了哑铃状短纤维增强复合材料的模型．分析了带球短纤维和基体中的应力分布，发现端头半径粗化将改善纤维中轴向应力分布，使之趋于均匀化，同时可减少纤维端部界面的剪应力．研究表明纤维长径比对纤维端头应力影响较小．讨论了纤维－基体模量比对纤维轴向最大拉伸应力和界面最大剪应力的影响．
The model of dumbbell fibre-reinforced composite is put forwards from the viewpoint of biomimetics.The stress distributions in the enlarged-end fibre and in the matrix are analyzed.The axial stress in the fibre is found to increase and the interfacial shear stress decrease with the radius of the enlarged end.It is shown that for the fibre aspect ratio of lengh to diameter,a small influence on the stress state at the fibre end is expected.The effect of the fibre-matrix elastic modulus ratio on the maximum axial stress in the fibre,and the interfacial maximum shear stress between fibre and matrix is discussed
出处
《金属学报》
CSCD
北大核心
1994年第4期B180-B186,共7页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
短纤维
复合材料
应力
仿生模型
biomimetics
dumbbell short fibre
short fibre reinforced composite
