摘要
针对有限元计算对几何数据的需要 ,详细研究了由四步 1∶ 1法编织的复合材料三维四向矩形编织物的角柱结构 ,为其建立了准确的几何模型。以矢量方法导出纺纱 (纤维束 )角柱段轴线、以及角柱段与内部段、角柱段与角柱段的接触线等的数学表达式。据此得到角柱结构几何参数值 。
To meet the need for geometric data in finite element investigation, The corner microstructure of three-dimensional (3-D) 4-directional rectangular composite preforms braided by 4-step 1:1 procedure is studied, and an accurate geometry model of the structure is developed. The vector method is used to deduce some mathematic expressions of the axis of yarn (fiber bundle) at fabric corner and the contact curves at which a yarn at one fabric corner touches with one at fabric interior or at another fabric corner, and etc. These formulas supply the geometric parameters of corner microstructure, which are useful to the graphic emulation and mechanical analysis of this material.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2001年第4期11-16,共6页
Acta Materiae Compositae Sinica
基金
国家教委博士点基金资助项目 ( 980 2 870 9)
关键词
复合材料
角柱结构
几何模型
三维四向矩形编织物
Composite materials
Finite element method
Mathematical models
Microstructure
