Composites with inclusions of negative bulk modulus: Extreme damping and negative poisson's ratio

Y. C. Wang, R. S. Lakes

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

The effect of a negative bulk modulus phase in elastic composites is studied. Negative bulk modulus K < 0 is shown to be possible in selected unit cells. In isotropic solids, K < 0 can be attained when negative Poisson's ratio v is sufficiently small, below the stability limit (for stress control) v = -1. Such materials, if used as inclusions, are predicted to be stable with respect to the band formation, even if they are large. Composites with spherical inclusions of negative bulk moduli are shown to exhibit negative Poisson's ratio and anomalies in composite bulk modulus and Young's modulus (and in the corresponding mechanical damping) but not in the shear modulus.

Original languageEnglish
Pages (from-to)1645-1657
Number of pages13
JournalJournal of Composite Materials
Volume39
Issue number18
DOIs
Publication statusPublished - 2005

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry

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