菱形十二面体闭孔多孔材料表征量特性研究  

Investigation into characterization of rhombus dodecahedron closed-cell cellular materials

作　　者：朱虹[1,2] 韩杰才[1] 张宇民[1] 张立刚[2] 

机构地区：[1]哈尔滨工业大学复合材料与结构研究所,黑龙江哈尔滨150001 [2]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《功能材料》2010年第11期2018-2021,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(90205034)

摘　　要：依据孔穴形成原理建立了描述多孔材料的闭孔粗棱菱形十二面体几何模型。给出了相对密度对微结构的依赖性及归一化关系;对相对弹性模量、泊松比进行了模拟计算,分析了微结构、相对密度对其的影响规律。结果显示,单胞壁厚是多孔材料相对密度增量的次要影响因素,壁面连接曲率半径是主要影响因素;壁面和壁面相交处增加固体对弹性模量的影响效果相同。研究结果可为多孔材料的参数设计提供理论依据。Based on cell formed principle,geometrical model which describes cellular materials closed-cell rhombus dodecahedron with thick edge is constructed.The dependence of relative density on microstructure and the unitary relation are also gained;relative elastic modulus and Poisson＇ratio are calculated,the influence of microstructure and relative density on above two material parameters are analysed.The results show that singlecell wall thickness is the secondary factor of relative density increment,wall-face connective curvature radius is the primary factor of relative density increment;the influence of increasing solid in wall-faces connective place on relative elastic modulus is same.These results can provide principle basis for cellular material parameters design.

关 键 词：多孔材料 菱形十二面体模型 弹性性能 有限元 

分 类 号：TB383[一般工业技术—材料科学与工程] O343[理学—固体力学]