THREE DIMENSIONAL NUMERICAL ANALYSIS OF EFFECTIVE PROPERTIES OF FIBER REINFORCED POLYMER MATRIX COMPOSITES
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摘要: 将细观力学和计算力学方法相结合用以确定复合材料中的局部和平均应力-应变场.对旋转体和非旋转体纤维增强复合材料的有效模量进行了三维有限元数值计算.分析了纤维的排列分布和纤维的几何形状对有效模量的影响.数值结果表明,轴向杨氏模量对细观结构不敏感,而纤维的形状排列方式对横观有效性能影响是显着的.Abstract: The three-dimensional finite element method (FEM) was combined with me-somechanics to determine the local and average stress-strain fields of fibrous composites. Computations for the circle and non-circle fiber-reinforced composites were performed to examine the effects of micro structures on the effective properties. The results indicate that the axial Yang's modulus is insensitive to the microstructures while the fiber distributions or fiber arrays as well as fiber shapes significantly affect the transverse effective properties of the composites.
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Key words:
- fibrous composite /
- finite element analysis /
- micromechanics /
- effective properties
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