3D打印硅橡胶基堆垛结构开孔材料及其压缩性能  

Three-dimensional Printing of Silicone Rubber Porous Material with Woodpile Structure and Its Compressive Behavior

作　　者：朱晓伟 刘禹 刘彤[5] 唐昶宇[3] 梅军[3] 杨建[3] ZHU Xiaowei;LIU Yu;LIU Tong;TANG Changyu;MEI Jun;YANG Jian(College of Civil Engineering and Architecture,Henan University of Technology,Zhengzhou 450001,China;Institute of System Engineering,China Academy of Engineering Physics,Mianyang 621900,China;Chengdu Green Energy and Green Manufacturing Technology R&D Center,Chengdu 610200,China;School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;Chengdu Development Center of Science and Technology,China Academy of Engineering Physics,Chengdu 610200,China)

机构地区：[1]河南工业大学土木工程学院,河南郑州450001 [2]中国工程物理研究院总体工程研究所,四川绵阳621900 [3]中国工程物理研究院成都绿色能源与绿色制造研究中心,四川成都610200 [4]江南大学机械工程学院,江苏无锡214122 [5]中国工程物理研究院成都科学与技术发展中心,四川成都610200

出　　处：《材料科学与工程学报》2020年第4期560-565,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51475484,51573217)。

摘　　要：基于线性直写式3D打印平台,设计并制备了两种具有堆垛结构(简单四方体型结构)特征的硅橡胶基开孔材料,泡孔结构表现出高度有序的特性。本研究从3D打印硅泡沫材料的单胞结构出发,建立相应的力学分析模型,结果表明ST型堆垛结构的弹性模量与基体材料弹性模量的比值E^*/E s同胶丝直径与胶丝间距比值d/l的平方呈正比关系。同时单轴压缩实验研究表明,与同孔隙率下的硅橡胶随机泡沫材料相比,3D打印硅泡沫的压缩力学行为表现出更为优异的一致性,且具有更高的线弹性模量以及更宽的弹性屈曲平台。本研究工作可为今后直写式3D打印硅橡胶基开孔材料的微结构设计与应用提供一定借鉴。Silicone foams with woodpile structure are designed and prepared by direct 3D ink writing.The foam structure exhibits highly ordered microstructure control with high cellular uniformity.Regarding foams with two kinds of ST(woodpile structures)architectures,mechanical model is developed based on study of the individual cell unit.The model indicates that the ratio of elastic modulus E^*to elastic modulus E s of matrix materials is finally proportional to the square of the ratio of filament diameter d to filament spacing l,i.e.,(E^*/E s)-(d/l)^2.More consistent compressive behavior,higher elastic modulus and a wider elastic buckling platform can be obtained for the 3D printed foams than those by the traditionally stochastic parts.These research results would be benefit for advanced design of elastomeric foams in mechanical shock absorption applications.

关 键 词：硅橡胶 多孔材料 堆垛结构 3D打印 压缩性能 

分 类 号：TB324[一般工业技术—材料科学与工程]