Pattern switching in soft cellular structures and hydrogel-elastomer composite materials under compression

It is well known that elastic instabilities induce pattern transformations when a soft cellular structure is compressed beyond critical limits. The nonlinear phenomena of pattern transformations make them a prime candidate for controlling macroscopic or microscopic deformation and auxetic properties...

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Main Authors: Hu, Jianying, Zhou, Yu, Liu, Zishun, Ng, Teng Yong
Other Authors: School of Mechanical and Aerospace Engineering
Format: Journal Article
Language:English
Published: 2018
Subjects:
Online Access:https://hdl.handle.net/10356/87767
http://hdl.handle.net/10220/45516
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author Hu, Jianying
Zhou, Yu
Liu, Zishun
Ng, Teng Yong
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Hu, Jianying
Zhou, Yu
Liu, Zishun
Ng, Teng Yong
author_sort Hu, Jianying
collection NTU
description It is well known that elastic instabilities induce pattern transformations when a soft cellular structure is compressed beyond critical limits. The nonlinear phenomena of pattern transformations make them a prime candidate for controlling macroscopic or microscopic deformation and auxetic properties of the material. In this present work, the novel mechanical properties of soft cellular structures and related hydrogel–elastomer composites are examined through experimental investigation and numerical simulations. We provide two reliable approaches for fabricating hydrogel–elastomer composites with rationally designed properties and transformed patterns, and demonstrate that different geometries of the repeat unit voids of the periodic pattern can be used to influence the global characteristics of the soft composite material. The experimental and numerical results indicate that the transformation event is dependent on the boundary conditions and material properties of matrix material for soft cellular structures; meanwhile, the deformation-triggered pattern of matrix material affects the pattern switching and mechanical properties of the hydrogel–elastomer material, thus providing future perspectives for optimal design, or serving as a fabrication suggestion of the new hydrogel–elastomer composite material.
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spelling ntu-10356/877672023-03-04T17:16:33Z Pattern switching in soft cellular structures and hydrogel-elastomer composite materials under compression Hu, Jianying Zhou, Yu Liu, Zishun Ng, Teng Yong School of Mechanical and Aerospace Engineering Composite Hydrogel–elastomer Materials Soft Periodic Structures It is well known that elastic instabilities induce pattern transformations when a soft cellular structure is compressed beyond critical limits. The nonlinear phenomena of pattern transformations make them a prime candidate for controlling macroscopic or microscopic deformation and auxetic properties of the material. In this present work, the novel mechanical properties of soft cellular structures and related hydrogel–elastomer composites are examined through experimental investigation and numerical simulations. We provide two reliable approaches for fabricating hydrogel–elastomer composites with rationally designed properties and transformed patterns, and demonstrate that different geometries of the repeat unit voids of the periodic pattern can be used to influence the global characteristics of the soft composite material. The experimental and numerical results indicate that the transformation event is dependent on the boundary conditions and material properties of matrix material for soft cellular structures; meanwhile, the deformation-triggered pattern of matrix material affects the pattern switching and mechanical properties of the hydrogel–elastomer material, thus providing future perspectives for optimal design, or serving as a fabrication suggestion of the new hydrogel–elastomer composite material. Published version 2018-08-07T06:26:48Z 2019-12-06T16:49:01Z 2018-08-07T06:26:48Z 2019-12-06T16:49:01Z 2017 Journal Article Hu, J., Zhou, Y., Liu, Z., & Ng, T. Y. (2017). Pattern switching in soft cellular structures and hydrogel-elastomer composite materials under compression. Polymers, 9(12), 229-. https://hdl.handle.net/10356/87767 http://hdl.handle.net/10220/45516 10.3390/polym9060229 en Polymers © 2017 The Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). 13 p. application/pdf
spellingShingle Composite Hydrogel–elastomer Materials
Soft Periodic Structures
Hu, Jianying
Zhou, Yu
Liu, Zishun
Ng, Teng Yong
Pattern switching in soft cellular structures and hydrogel-elastomer composite materials under compression
title Pattern switching in soft cellular structures and hydrogel-elastomer composite materials under compression
title_full Pattern switching in soft cellular structures and hydrogel-elastomer composite materials under compression
title_fullStr Pattern switching in soft cellular structures and hydrogel-elastomer composite materials under compression
title_full_unstemmed Pattern switching in soft cellular structures and hydrogel-elastomer composite materials under compression
title_short Pattern switching in soft cellular structures and hydrogel-elastomer composite materials under compression
title_sort pattern switching in soft cellular structures and hydrogel elastomer composite materials under compression
topic Composite Hydrogel–elastomer Materials
Soft Periodic Structures
url https://hdl.handle.net/10356/87767
http://hdl.handle.net/10220/45516
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AT ngtengyong patternswitchinginsoftcellularstructuresandhydrogelelastomercompositematerialsundercompression