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Materials Science and Nanotechnology | Volume: 03
WORLD CONGRESS ON SMART MATERIALS AND STRUCTURES
&
3
rd
International Conference on
POLYMER CHEMISTRY AND MATERIALS ENGINEERING
November 21-22, 2019 | Singapore
Joint event on
P
erforated mechanical metamaterials providing unique
physical properties, such as band gaps for wave
propagation and negative poison ratio, have recently
attracted significant interest. Despite numerous works
on configuration optimization, however, relatively few
studies have explored the role of perforation layout (holes
arrangement) on the dynamic behavior of metamaterials.
Here, we report two kinds of perforation layout based
on regular configuration to investigate the effect of
perforation layout on wave attenuation properties
and mechanical behaviors. The proposed layouts are
characterized by the redistribution of the construction
material via pore rotation. Our analysis not only shows that
the proposed layouts obtain broad and multiple band- gaps
in low-frequency range and exhibit extreme Poisson’s ratio
and Young’s modulus variations, but also reveals how the
reduction of connector thickness and geometric symmetry
contribute to the unusual response. Our numerical study
provides a new perspective to design auxetic perforated
metamaterials with low porosity and wide and low-
frequency band gaps.
Biography
Shutian Liu completed his PhD fromDalian University of Technology, China
in 1994. He is the professor of Dalian University of Technology. His research
interests focused on the structural and multidisciplinary optimization,
metamaterial design, and smart material and structures. He has over 150
publications that have been cited over 500 times.
e:
stliu@dlut.edu.cnShutian Liu
Dalian University of Technology, China
Band-gap mechanical metamaterial design based on perforation
layout optimization of low porosity perforated sheets
Mater Sci Nanotechnol, Volume: 03