Novel negative poisson's ratio lattice structures with enhanced stiffness and energy absorption capacity

Chen, Z, Wang, Z, Zhou, S, Shao, J and Wu, X 2018, 'Novel negative poisson's ratio lattice structures with enhanced stiffness and energy absorption capacity', Materials, vol. 11, no. 7, pp. 1095-20.


Document type: Journal Article
Collection: Journal Articles

Title Novel negative poisson's ratio lattice structures with enhanced stiffness and energy absorption capacity
Author(s) Chen, Z
Wang, Z
Zhou, S
Shao, J
Wu, X
Year 2018
Journal name Materials
Volume number 11
Issue number 7
Start page 1095
End page 20
Total pages -1074
Publisher MDPIAG
Abstract The weak stiffness and strength of materials with negative Poisson's ratio limits their application. In this paper, three types of novel lattices with negative Poisson's ratio are proposed to improve not only stiffness and strength but also energy absorption capacity by embedding different ribs into a classic re-entrant structure. Unit cell analyses show these novel lattices have significantly increased Young's modulus along the loading direction, and Type C can maintain sufficient negative Poisson's ratio performance compared with the base lattice. In addition, the novel lattices exhibit higher yield stress, plateau stress and densification strain extracted from quasi-static compressive simulation. The lattices are prototyped by laser-based additive manufacturing and tested in quasi-static experiments, which show the experimental data match the numerical results within an error of margin. The work signifies the prospect of lattices with negative Poisson's ratio in enhancing engineering-applicable structures, and indicates the potential of structural topology optimization in more sophisticated designs.
Subject Structural Engineering
Keyword(s) Energy absorption
Lattice
Negative Poisson's ratio
Unit cell analysis
DOI - identifier 10.3390/ma11071095
Copyright notice © 2018 by the authors. Licensee MDPI, Basel, Switzerland. e Creative Commons Attribution (CC BY) license.
ISSN 1996-1944
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