On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer

Liao, Zisheng; Hossain, Mokarram; Yao, Xiaohu; Mehnert, Markus; Steinmann, Paul

doi:10.1016/j.ijnonlinmec.2019.103263

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On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer

Zisheng Liao, Mokarram Hossain

, Xiaohu Yao, Markus Mehnert, Paul Steinmann

International Journal of Non-Linear Mechanics, Start page: 103263

Swansea University Author: Mokarram Hossain

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DOI (Published version): 10.1016/j.ijnonlinmec.2019.103263

Abstract

Recently, the so-called Very High Bond (VHB in short) tape has proven to be an ideal polymer for producing devices made of electric field-responsive functional materials, e.g., actuators in soft robotics, stretch sensors in wearable devices, and energy harvesters generating power from ambient motion...

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Published in:	International Journal of Non-Linear Mechanics
ISSN:	0020-7462
Published:	Elsevier 2019
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa51753
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spelling	2019-09-10T10:38:56.0151797 v2 51753 2019-09-10 On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer 140f4aa5c5ec18ec173c8542a7fddafd 0000-0002-4616-1104 Mokarram Hossain Mokarram Hossain true false 2019-09-10 GENG Recently, the so-called Very High Bond (VHB in short) tape has proven to be an ideal polymer for producing devices made of electric field-responsive functional materials, e.g., actuators in soft robotics, stretch sensors in wearable devices, and energy harvesters generating power from ambient motions. The VHB polymer is commercially available in several thicknesses. For this study, we have selected VHB 4905 due to its wide use as a common material for dielectric elastomers. The acrylic-based polymer is highly deformable, extremely viscoelastic, and highly sensitive to temperature fluctuations. Hence, in order to understand its mechanical and electro-mechanical behaviour, extensive experiments need to be conducted to unravel temperature dependencies in addition to strain-rate dependences. In this study, we present a wide variety of temperature experiments ranging from -30C to 80C at various strain rates and stretch levels under homogeneous deformation and temperature fields. The study demonstrates a pronounced influence of the temperature on the mechanical response of the VHB polymer. For VHB within the temperature range of our study, an increased temperature mechanically softens the material and vice-versa. After conducting a wide range of experiments, we propose a finite strain thermo-viscoelastic constitutive model that is an extension of a phenomenologically-motivated model where a non-linear evolution law is devised based on the classical concept of the multiplicative decomposition of the deformation gradient. Then, decoupled one-dimensional equations are derived and fitted to experimental data to identify relevant material parameters appearing in the model. The thermo-viscoelastic model validation shows its reasonably good capability to predict the experimental results. Journal Article International Journal of Non-Linear Mechanics 103263 Elsevier 0020-7462 VHB polymer, Thermo-viscoelasticity, Temperature dependence, Dielectric elastomers 31 12 2019 2019-12-31 10.1016/j.ijnonlinmec.2019.103263 https://www.sciencedirect.com/science/article/pii/S0020746219303415 COLLEGE NANME General Engineering COLLEGE CODE GENG Swansea University 2019-09-10T10:38:56.0151797 2019-09-10T06:24:27.3896369 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - General Engineering Zisheng Liao 1 Mokarram Hossain 0000-0002-4616-1104 2 Xiaohu Yao 3 Markus Mehnert 4 Paul Steinmann 5 0051753-10092019103806.pdf liao2019(2).pdf 2019-09-10T10:38:06.1300000 Output 3803004 application/pdf Accepted Manuscript true 2020-09-09T00:00:00.0000000 © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ false eng
title	On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer
spellingShingle	On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer Mokarram Hossain
title_short	On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer
title_full	On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer
title_fullStr	On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer
title_full_unstemmed	On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer
title_sort	On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer
author_id_str_mv	140f4aa5c5ec18ec173c8542a7fddafd
author_id_fullname_str_mv	140f4aa5c5ec18ec173c8542a7fddafd_***_Mokarram Hossain
author	Mokarram Hossain
author2	Zisheng Liao Mokarram Hossain Xiaohu Yao Markus Mehnert Paul Steinmann
format	Journal article
container_title	International Journal of Non-Linear Mechanics
container_start_page	103263
publishDate	2019
institution	Swansea University
issn	0020-7462
doi_str_mv	10.1016/j.ijnonlinmec.2019.103263
publisher	Elsevier
college_str	Faculty of Science and Engineering
hierarchytype
hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Aerospace, Civil, Electrical, General and Mechanical Engineering - General Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - General Engineering
url	https://www.sciencedirect.com/science/article/pii/S0020746219303415
document_store_str	1
active_str	0
description	Recently, the so-called Very High Bond (VHB in short) tape has proven to be an ideal polymer for producing devices made of electric field-responsive functional materials, e.g., actuators in soft robotics, stretch sensors in wearable devices, and energy harvesters generating power from ambient motions. The VHB polymer is commercially available in several thicknesses. For this study, we have selected VHB 4905 due to its wide use as a common material for dielectric elastomers. The acrylic-based polymer is highly deformable, extremely viscoelastic, and highly sensitive to temperature fluctuations. Hence, in order to understand its mechanical and electro-mechanical behaviour, extensive experiments need to be conducted to unravel temperature dependencies in addition to strain-rate dependences. In this study, we present a wide variety of temperature experiments ranging from -30C to 80C at various strain rates and stretch levels under homogeneous deformation and temperature fields. The study demonstrates a pronounced influence of the temperature on the mechanical response of the VHB polymer. For VHB within the temperature range of our study, an increased temperature mechanically softens the material and vice-versa. After conducting a wide range of experiments, we propose a finite strain thermo-viscoelastic constitutive model that is an extension of a phenomenologically-motivated model where a non-linear evolution law is devised based on the classical concept of the multiplicative decomposition of the deformation gradient. Then, decoupled one-dimensional equations are derived and fitted to experimental data to identify relevant material parameters appearing in the model. The thermo-viscoelastic model validation shows its reasonably good capability to predict the experimental results.
published_date	2019-12-31T04:03:46Z
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score	11.012678

On thermo-viscoelastic experimental characterisation and numerical modelling of VHB polymer

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