作者
Li Yang, Ola Harrysson, Harvey West, Denis Cormier
发表日期
2012/5/1
期刊
Acta Materialia
卷号
60
期号
8
页码范围
3370-3379
出版商
Pergamon
简介
In this current work, a Ti–6Al–4V 3-D re-entrant lattice auxetic structure is manufactured by the electron beam melting (EBM) process. Four different design configurations (two negative Poisson’s ratio values×two relative densities) were manufactured and tested under compressive stress. Two failure modes were observed whose occurrence appeared to be dependent on the ratio of vertical strut length to re-entrant strut length. A small deflection analytical model is presented that predicts yield strength and modulus for one type of design with good accuracy. Results also show that the re-entrant lattice structure possesses superior mechanical properties compared to regular foam structures. Limitations of the analytical model are also discussed.
学术搜索中的文章
L Yang, O Harrysson, H West, D Cormier - Acta Materialia, 2012