以空心规则14面体周期模型为参照,结合实际泡沫材料中出现的胞体形状及胞体排列的不规则特性,引入不规则14面胞体随机变形参数及胞体随机排列指数,得到不规则14面体部分不连续/重叠有限元模型;同时,假定短纤随机分布于胞壁和胞杆之中,纤维长度随机分布密度函数为Maxwell分布,纤维空间取向角随机分布密度函数为正态分布,建立了短纤维分布的随机模型.最后,利用不规则14面体部分不连续/重叠模型分析了胞壁厚度随机变化、胞杆截面任意三角形边长的随机变化、胞体随机形变、胞体随机排列及纤维增强等因素对弹性模量的影响,并与其它相关研究结果进行了比较,说明了本模型的优点和有效性.
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