Mechanical Properties of the 2D Re-entrant Honeycomb Made via Direct Metal Printing

2017 2nd International Conference on Advanced Materials Research and Manufacturing Technologies

材料科学;机械制造

Alomarah, Amer^1,2 ; Zhang, Jianjun^1 ; Ruan, Dong^1 ; Masood, Syed^1 ; Lu, Guoxing^1

Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn

VIC

3122, Australia^1

Department of Mechanics, College of Engineering, Wasit University, Al-Kut

52001, Iraq^2

关键词: Deformation history;    Force and displacements;    Image correlations;    Lateral directions;    Loading direction;    Negative poisson's ratios;    Uni-axial loading;    Uniaxial tensions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/229/1/012038/pdf
DOI  :  10.1088/1757-899X/229/1/012038

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Auxetic structural materials show distinctive properties by exhibiting a negative Poisson's ratio (NPR). When these structures are subjected to uniaxial loading, they expand in tension and contract in compression in both loading and lateral directions. In this paper, two AlSi12 re-entrant honeycomb samples were manufactured using direct metal printing (DMP). Quasi-static uniaxial tension was executed in both X and Y direction. A Digital VIC-2D Image Correlation System was used to record the deformation history. Force and displacement were measured by ZWICK machine. The results show that loading direction has a significant effect on the mechanical properties and auxeticity of the tested structure. Re-entrant honeycomb under X-loading withstand lower force and has smaller magnitude of Poisson's ratio compared with that under Y-loading.