In-plane mechanical behavior of a new star-re-entrant hierarchical metamaterial
In-plane mechanical behavior of a new star-re-entrant hierarchical metamaterial
A novel hierarchical metamaterial with tunable negative Poisson's ratio is designed by a re-entrant representative unit cell (RUC), which consists of star-shaped subordinate cells. The in-plane mechanical behaviors of star-re-entrant hierarchical metamaterial are studied thoroughly by finite element method, non-dimensional effective moduli and effective Poisson's ratios (PR) are obtained, then parameters of cell length, inclined angle, thickness for star subordinate cell as well as the amount of subordinate cell along x, y directions for re-entrant RUC are applied as adjustable design variables to explore structure-property relations. Finally, the effects of the design parameters on mechanical behavior and relative density are systematically investigated, which indicate that high specific stiffness and large auxetic deformation can be remarkably enhanced and manipulated through combining parameters of both subordinate cell and parent RUC. It is believed that the new hierarchical metamaterial reported here will provide more opportunities to design multifunctional lightweight materials that are promising for various engineering applications.
Auxetic, Hierarchical, Mechanical behavior, Metamaterial, Re-entrant structure
Zhang, Wenjiao
3c0e7a81-95f7-450a-9fb5-b29df0c07c2b
Zhao, Shuyuan
514dac6c-aafd-4d40-9856-5809934ba5c7
Sun, Rujie
e3dad16d-6c79-4972-8378-edca28a3babd
Scarpa, Fabrizio
684472c3-1a28-478a-a388-5fd896986c1d
Wang, Jinwu
e9efd6ab-49ee-421d-9e33-a08a37dd3e6e
3 July 2019
Zhang, Wenjiao
3c0e7a81-95f7-450a-9fb5-b29df0c07c2b
Zhao, Shuyuan
514dac6c-aafd-4d40-9856-5809934ba5c7
Sun, Rujie
e3dad16d-6c79-4972-8378-edca28a3babd
Scarpa, Fabrizio
684472c3-1a28-478a-a388-5fd896986c1d
Wang, Jinwu
e9efd6ab-49ee-421d-9e33-a08a37dd3e6e
Zhang, Wenjiao, Zhao, Shuyuan, Sun, Rujie, Scarpa, Fabrizio and Wang, Jinwu
(2019)
In-plane mechanical behavior of a new star-re-entrant hierarchical metamaterial.
Polymers, 11 (7), [1132].
(doi:10.3390/polym11071132).
Abstract
A novel hierarchical metamaterial with tunable negative Poisson's ratio is designed by a re-entrant representative unit cell (RUC), which consists of star-shaped subordinate cells. The in-plane mechanical behaviors of star-re-entrant hierarchical metamaterial are studied thoroughly by finite element method, non-dimensional effective moduli and effective Poisson's ratios (PR) are obtained, then parameters of cell length, inclined angle, thickness for star subordinate cell as well as the amount of subordinate cell along x, y directions for re-entrant RUC are applied as adjustable design variables to explore structure-property relations. Finally, the effects of the design parameters on mechanical behavior and relative density are systematically investigated, which indicate that high specific stiffness and large auxetic deformation can be remarkably enhanced and manipulated through combining parameters of both subordinate cell and parent RUC. It is believed that the new hierarchical metamaterial reported here will provide more opportunities to design multifunctional lightweight materials that are promising for various engineering applications.
Text
polymers-11-01132
- Version of Record
More information
Accepted/In Press date: 21 June 2019
Published date: 3 July 2019
Keywords:
Auxetic, Hierarchical, Mechanical behavior, Metamaterial, Re-entrant structure
Identifiers
Local EPrints ID: 486756
URI: http://eprints.soton.ac.uk/id/eprint/486756
ISSN: 2073-4360
PURE UUID: 9a15796c-0ece-4be3-9cdd-8dc987ec1529
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Date deposited: 06 Feb 2024 17:30
Last modified: 17 Mar 2024 07:25
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Contributors
Author:
Wenjiao Zhang
Author:
Shuyuan Zhao
Author:
Rujie Sun
Author:
Fabrizio Scarpa
Author:
Jinwu Wang
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