基于3D打印的泡孔空间点阵对力学性能的影响  

Effect of Cell Space Lattice on Mechanical Properties of ABS Based on 3D Printing Process

作　　者：高东明[1] 王向东[1] 胡晶[1] 李杰[1] 

机构地区：[1]北京工商大学材料与机械工程学院,北京100048

出　　处：《中国塑料》2017年第5期65-70,共6页China Plastics

基　　金：国家自然科学基金资助项目(51505006)

摘　　要：基于三维(3D)打印零件的轻量化要求,对多孔材料的泡孔空间几何分布模型进行了建模和分类;利用3D打印技术制得了3种泡孔空间点阵结构的丙烯腈-丁二烯-苯乙烯共聚物(ABS)试样,对试样的空间泡孔点阵结构类型及孔隙率与材料力学性能进行了研究。结果表明,在表观密度相同的条件下,材料的应力-应变曲线斜率差异较大,且随着孔隙率的增大,3种结构的曲线斜率差异也逐渐明显;泡孔结构类型不同,其力学特性参数对孔隙率的敏感度存在较大的差异;随孔隙率的增大,面心立方结构的弹性模量缓慢减小,体心立方和正方结构的弹性模量则快速减小。On the basis of the requirement of lightweight for 3D printed parts,geometric distribution models toward different cellular structure were established and classified.Then,three kinds of cell space lattice-structural specimens based on acrylonitrile butadiene-styrene copolymer （ABS） were fabricated by 3D printing technology,and the relationship among their cell space lattice structure and porosity and tensile mechanical properties were investigated.The results indicated that three lattice-structural ABS samples presented different stress strain curves in the same apparent density.Slopes of the three samples exhihited an increasing difference with an increase of apparent porosity increasing.There is great differnce between mechanical properties and sensitivity of porosity according to different lattice structures.With the increase of porosity,the elastic modulus of the sample with face-centered cubic structure decreased slowly;however,a rapid decline in elastic modulus was observed for the samples with the body centered cubic and cornercentered structures.

关 键 词：泡孔结构 布拉菲点阵 力学特性 弹性模量 

分 类 号：TB383.4[一般工业技术—材料科学与工程] TQ317[化学工程—高聚物工业]