微孔聚氨酯弹性体力学性能的有限元模拟  

Finite Element Simulation on the Mechanical Properties of Microcellular Polyurethane Elastomers

作　　者：陈巧悦 丁明明[2] 黄以能[1,3] 贾玉玺[4] 石彤非[2] 

机构地区：[1]伊犁师范学院物理科学与技术学院新疆凝聚态相变与微结构实验室,伊宁835000 [2]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春130022 [3]南京大学物理学院国家固体微结构重点实验室,南京210093 [4]山东大学材料液固结构演变与加工教育部重点实验室,济南250061

出　　处：《高分子学报》2015年第10期1231-1234,共4页Acta Polymerica Sinica

基　　金：国家重点基础研究发展计划子课题(项目号2012CB821503);国家自然科学基金重点(基金号21234007)资助项目

摘　　要：利用COMSOL Multiphysics V4.4多物理场耦合分析软件,构建了微孔聚氨酯弹性体的二维计算模型.不仅计算了控制孔数不变改变孔径引起的孔密度的变化对应力的影响,而且还计算了控制孔径不变改变孔数引起的孔密度的变化对应力的影响.模拟结果发现孔密度是影响材料力学性能的重要因素,即当孔密度小于0.4时,应力随孔密度成线性增大,而当孔密度大于0.5时,应力随孔密度成非线性增大,泡孔的增韧作用显著.不仅如此,还发现减小泡孔孔径的波动范围有利于材料力学性能的稳定.A two-dimensional microscopic model of microcellular polyurethane elastomer （MPUE） was established by using COMSOL MultiphysicsV4.4 of the multiphysics finite element analysis. Based on the same hole size, the effect of the hole density was calculated, as a result, it significantly affects the mechanical properties of the MPUE. In addition, based on the same hole number,the corresponding hole density also affects the mechanical properties of the MPUE. The results indicate that the hole density is important in affecting the mechanical properties of the MPUE. When the hole density is less than 0.4,the stress increases linearly with the increase of the hole density ; while when it is greater than 0.5, the stress increases nonlinearly with the increase of the hole density and the toughening effect of the holes are more obvious. In addition, the fluctuation of the hole size makes an increase of the stress, while reducing the variance of the hole size can improve the stability of the mechanical properties of MPUE.

关 键 词：微孔聚氨酯弹性体 力学性能 有限元模拟 

分 类 号：TQ334.1[化学工程—橡胶工业]