Understanding mechanical behavior of metallic foam with hollow struts using the hollow pentagonal dodecahedron model

SCRIPTA MATERIALIA

卷:182

Article

Dai, Rui¹  Wang, Meng²  Wang, Dini³  Hu, Zengrong⁴  Green, Matthew D.²  Nian, Qiong^1,3 

[1] Arizona State Univ, Sch Engn Matter Transport & Energy, Dept Mech Engn, Tempe, AZ 85281 USA

[2] Arizona State Univ, Sch Engn Matter Transport & Energy, Dept Chem Engn, Tempe, AZ 85281 USA

[3] Arizona State Univ, Sch Engn Matter Transport & Energy, Dept Mat Sci & Engn, Tempe, AZ 85281 USA

[4] Soochow Univ, Sch Rail Transportat, Suzhou 215131, Jiangsu, Peoples R China

关键词: Cellular material;    Metallic foam;    Hollow strut;    Pentagonal dodecahedron;    Elastic modulus;   

DOI  :  10.1016/j.scriptamat.2020.03.001

来源: Elsevier

【 摘 要 】

Nickel (Ni) foam with hollow struts, as one type of ultralight stochastic cellular material, can be simply manufactured by electroplating on a thermally or chemically removable template. A fundamental understanding is required to create a consistent lattice model with capability to capture its mechanical behavior. Herein, an unprecedented hollow pentagonal dodecahedron (HPD) model is proposed with a novel 3D packing architecture. HPD model reveals the scaling of Young's modulus (E) to relative density (rho') in the factor of 2, which agrees well with uniaxial compression tests. This simplified model paves a way to investigate the cellular material with hollow struts. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free