Premium
Enhanced Auxetic and Viscoelastic Properties of Filled Reentrant Honeycomb
Author(s) -
Wang Yun-Che,
Lai Hsiang-Wei,
Ren Xuejun James
Publication year - 2020
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201900184
Subject(s) - materials science , composite material , viscoelasticity , honeycomb , auxetics , composite number , filler (materials) , stiffness , modulus , honeycomb structure , aspect ratio (aeronautics) , reentrancy , computer science , programming language
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.