关键词: 泡孔结构, 布拉菲点阵, 力学特性, 弹性模量

Abstract: 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 corner-centered structures.

Key words: cellular structure, bravais lattice, mechanical property, elastic modulus