Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30166
Title: A novel concept to develop composite structures with isotropic negative Poisson's ratio : effects of random inclusions
Authors: Hou, X
Hu, H 
Silberschmidt, V
Keywords: A. Structural composites
B. Mechanical properties
C. Finite element analysis (FEA)
D. Negative Poisson's ratio
Issue Date: 2012
Publisher: Pergamon Press
Source: Composites science and technology, 2012, v. 72, no. 15, p. 1848-1854 How to cite?
Journal: Composites science and technology 
Abstract: Materials with negative Poisson's ratio (NPR) effects have been studied for decades. However, the studies have mainly focused on 2D periodic structures which only have NPR effects in certain in-plane directions. In this paper, a novel concept is proposed to develop composite structures with isotropic NPR effects using NPR random inclusions. The study starts from a finite element analysis of deformation mechanisms of two 2D representative cells which are embedded with a re-entrant square and a re-entrant triangle, respectively. Based on the analysis results, the re-entrant triangles are selected as random inclusions into a matrix to form 2D composite structures. Four such composite structures are built with different numbers of inclusions through a parametric model, and their NPR effects and mechanical behaviors are analyzed using the finite element method. The results show that the isotropic NPR effects of composites can be obtained with high random re-entrant inclusions. Thus, the novel concept proposed is numerically proved by this study.
URI: http://hdl.handle.net/10397/30166
ISSN: 0266-3538
EISSN: 1879-1050
DOI: 10.1016/j.compscitech.2012.07.020
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