基于Voronoi随机模型的各向异性闭孔泡沫的弹性性能研究  

Investigation into Elastic Properties of Closed-Cell Foam Based on the Voronoi Random Anisotropic Model

作　　者：曹禹[1] 李文晓[1] 官威[1] 

机构地区：[1]同济大学航空航天与力学学院,上海200092

出　　处：《材料导报》2012年第16期145-148,共4页Materials Reports

基　　金：上海市自然科学基金项目(08ZRl420400);上海市重点学科建设项目(B302)

摘　　要：基于Voronoi各向异性随机模型,通过引入Voronoi随机系数、壁厚随机度以及相对密度,讨论闭孔泡沫胞体分布的随机性、相对密度以及胞体壁厚的不均匀性对泡沫的弹性性能的影响,并将结果与理论预测结果以及实验值进行对比分析。结果表明,泡沫胞体的形状一定时,相对密度对弹性模量各向异性比、泊松比的影响很小,壁厚随机度的增加对弹性模量起减小作用,但对泡沫的弹性模量各向异性比以及泊松比的影响都很小;当泡沫形状各向异性比一定时,随机系数的增加会引起弹性模量、弹性模量各向异性比以及泊松比的减小。Based on the Voronoi random model for close＆cell foam, the effects of model irregularity, relative density and non-uniformity of cell wall thickness on anisotropic elastic properties of close＆cell foams were investigated. The results obtained was compared with theoretical predicted results and experimental values. Results indicate when the shape of models are the same, the relative density has a small effect on the Poisson＇s ratio and elastic modulus anisotropy ratio, the random cell wall thickness has a reducing effect on the anisotropic elastic modulus, but the effects on the Poisson＇s ratio and elastic modulus anisotropy ratio is very small; the random level of the foam shape has a reducing effect on the elastic modulus,Poisson＇s ratio and elastic modulus anisotropy ratio.

关 键 词：闭孔泡沫 各向异性 随机模型 弹性性能 

分 类 号：TB115[理学—数学] TB301[理学—应用数学]