A novel concept to develop composite structures with isotropic negative Poisson's ratio: Effects of random inclusions

Xiaonan Hou, Hong Hu, Vadim Silberschmidt

Research output: Journal article publicationJournal articleAcademic researchpeer-review

52 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)1848-1854
Number of pages7
JournalComposites Science and Technology
Issue number15
Publication statusPublished - 16 Oct 2012


  • A. Structural composites
  • B. Mechanical properties
  • C. Finite element analysis (FEA)
  • D. Negative Poisson's ratio

ASJC Scopus subject areas

  • Ceramics and Composites
  • Engineering(all)

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