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Auxetic elastomers: Mechanically programmable meta-elastomers with an unusual Poisson's ratio overcome the gauge limit of a capacitive type strain sensor

Cited 43 time in Web of Science Cited 46 time in Scopus
Authors

Lee, Young-Joo; Lim, Seung-Min; Yi, Seol-Min; Lee, Jeong-Ho; Kang, Sung-gyu; Choi, Gwang-Mook; Han, Heung Nam; Sun, Jeong-Yun; Choi, In-Suk; Joo, Young-Chang

Issue Date
2019-09
Publisher
Elsevier Limited
Citation
Extreme Mechanics Letters, Vol.31, p. 100516
Abstract
How can we modulate the inherent Poisson's ratio value of soft elastomeric materials? The theoretical limit value of the Poisson's ratio of isotropic materials can be defined from -1 to 0.5 but elastomers generally take the Poisson's ratio of 0.5. Herein, we introduce and establish the concept of a mechanical meta elastomer called "auxetic elastomer". This is a continuum-solid elastomer having unique programmable elastic properties of Poisson's ratio that are beyond their conventional ranges, and include in-plane negative and out-of-plane high positive Poisson's ratios. Leveraging these unique deformation characteristics, we applied auxetic elastomers as a soft dielectric material for a highly stretchable capacitive-type strain sensor that overcomes the inherent performance limitations in terms of the low gauge factor. (C) 2019 Elsevier Ltd. All rights reserved.
ISSN
2352-4316
URI
https://hdl.handle.net/10371/201944
DOI
https://doi.org/10.1016/j.eml.2019.100516
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  • College of Engineering
  • Department of Materials Science & Engineering
Research Area High Temperature Alloys, High Strength , Nano Mechanics and Nano Structure Design for Ultra Strong Materials, Shape and Pattern Design for Engineering Materials

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