通过模拟颗粒随机分布的复合材料,应用均匀化方法预测出材料的宏观等效弹性性能,研究其统计特性,探讨颗粒大小、分布和几何形状的变化对材料等效弹性性能的影响。结果表明:所取代表体元尺寸与颗粒尺寸之比大于某临界值时,材料的宏观等效杨氏模量趋于某恒定值;颗粒位置的随机性使材料等效杨氏模量的概率分布近似为正态分布;椭圆形截面的增强相有助于提高材料的等效杨氏模量。
The statistical characters of the elastic homogenization: method. The randomness of the elastic properties of particle composite materials are analyzed with properties of the composite is induced from the uncertainty of the shape, the size and the distribution of the partial inclusions. According to research, equivalent Young's modulus will get immovable constant when the length of base cell is enough, and the equivalent Young' s modulus of the stochastic distribution of grains is almost normal distribution.