Enhanced Auxetic and Viscoelastic Properties of Filled Reentrant Honeycomb

Yun Che Wang, Hsiang Wei Lai, Xuejun James Ren

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Honeycombs or foams with reentrant microstructures exhibit effective negative Poisson's ratio. Although they are light weight due to inherently empty space, their overall stiffness and damping are somewhat limited. With judiciously chosen filler material to fill the voids in star-shaped honeycomb, it is numerically demonstrated its auxeticity may be enhanced. By combining the filler and skeleton, the hierarchical composite materials are constructed. The magnitude of the enhancement depends on inner and outer filler's modulus mismatch, as well as the types of filling. Filler's auxeticity also largely enhances overall auxeticity of the outer- and all-filled honeycomb. In addition, for outer-filled honeycomb, its effective viscoelastic modulus and damping are significantly increased, while maintaining relatively light weight, due to local stress concentration.

Original languageEnglish
Article number1900184
JournalPhysica Status Solidi (B) Basic Research
DOIs
Publication statusAccepted/In press - 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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