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中文摘要：
该文采用二维Voronoi随机分布模型研究了＂真实＂泡沫材料在准静态荷载作用下的力学特性。建立了不同规则度下Voronoi随机分布模型、在相对密度保持不变的情况下改变孔壁不均匀度的模型和在均匀孔壁厚度下删除不同孔壁百分比等三种Voronoi模型。对这三种模型分别进行了准静态荷载作用下的有限元模拟分析。分析结果表明：不同不规则度下Voronoi模型应力-应变曲线不同于规则蜂窝材料的应力-应变曲线且弹性模量均比规则蜂窝多孔材料的弹性模量要大;弹性模量和平台应力随孔壁厚度不均匀度变化先增大后减小;弹性模量和平台应力随着删除百分比的增大逐渐而减小。
英文摘要：
The mechanical properties of ＇real＇ cellular metallic materials under the quasi-static loads are investigated in this paper using of the 2D Voronoi random models.Three kinds of Voronoi random models are modeled as follows： Type Ⅰ with different irregular degrees,TypeII with different inhomogeneous degrees but keeping the same relative density,and Type III with the imperfections of configuration but keeping the same relative density.These three Voronoi random models are analyzed using the finite element method.The analyses results show that the stress-strain curves of different irregular degrees are different from those of honeycomb cellular materials and the elastic modului of the former are bigger than those of the latter.With the inhomogeneous degrees increasing,the elastic modului and Plateau stresses increase firstly and then decrease.With the deletion percentage ratios of cell walls increasing,the elastic modului and Plateau stresses decrease gradually.
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