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3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions

Mokarram Hossain Orcid Logo, Rukshan Navaratne, Djordje Peric Orcid Logo

International Journal of Non-Linear Mechanics, Volume: 126, Start page: 103546

Swansea University Authors: Mokarram Hossain Orcid Logo, Djordje Peric Orcid Logo

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Abstract

Digital Light Synthesis (DLS) technology creates ample opportunities for making 3D printed soft polymers for a wide range of grades and properties. In DLS, a 3D printer uses a continuous building technique in which the curing process is activated by an ultra-violet (UV) light. In this contribution,...

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Published in: International Journal of Non-Linear Mechanics
ISSN: 0020-7462
Published: Elsevier BV 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa54665
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spelling 2020-08-21T15:32:12.0651828 v2 54665 2020-07-07 3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions 140f4aa5c5ec18ec173c8542a7fddafd 0000-0002-4616-1104 Mokarram Hossain Mokarram Hossain true false 9d35cb799b2542ad39140943a9a9da65 0000-0002-1112-301X Djordje Peric Djordje Peric true false 2020-07-07 GENG Digital Light Synthesis (DLS) technology creates ample opportunities for making 3D printed soft polymers for a wide range of grades and properties. In DLS, a 3D printer uses a continuous building technique in which the curing process is activated by an ultra-violet (UV) light. In this contribution, EUP40, a recently invented commercially available elastomeric polyurethane (EPU) printed by the DLS technology, is experimentally characterised. For characterizing the mechanical properties, an extensive viscoelastic experimental study on the digitally printed EPU taking the strain rate-dependence are conducted. The study reveals a significant time-dependency on its mechanical responses. Moreover, the material demonstrates noticeable nonlinear viscosities that depend on strain and strain rates. Based on the experimental findings for the printed elastomer, a large strain viscoelastic model is devised where evolution laws are enhanced by strain and strain rate-dependent nonlinear viscosities. Following identifications of relevant material parameters, we validate the model with the experimental data that show its good predictability. Such an extensive experimental study along with a constitutive model will help in designing and simulating more complex cellular and structured metamaterials using 3D printed elastomeric polyurethanes. Journal Article International Journal of Non-Linear Mechanics 126 103546 Elsevier BV 0020-7462 Digital Light Synthesis (DLS), Elastomeric polyurethane (EPU), 3D printing, Additive manufacturing, Viscoelastic characterization 1 11 2020 2020-11-01 10.1016/j.ijnonlinmec.2020.103546 COLLEGE NANME General Engineering COLLEGE CODE GENG Swansea University 2020-08-21T15:32:12.0651828 2020-07-07T15:13:31.7718783 Mokarram Hossain 0000-0002-4616-1104 1 Rukshan Navaratne 2 Djordje Peric 0000-0002-1112-301X 3 54665__17673__6a2c9cdbd60a4a11aafded53eb2f9fc6.pdf 54665.pdf 2020-07-07T15:15:50.8308410 Output 9308896 application/pdf Accepted Manuscript true 2020-07-08T00:00:00.0000000 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ true English
title 3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions
spellingShingle 3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions
Mokarram Hossain
Djordje Peric
title_short 3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions
title_full 3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions
title_fullStr 3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions
title_full_unstemmed 3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions
title_sort 3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions
author_id_str_mv 140f4aa5c5ec18ec173c8542a7fddafd
9d35cb799b2542ad39140943a9a9da65
author_id_fullname_str_mv 140f4aa5c5ec18ec173c8542a7fddafd_***_Mokarram Hossain
9d35cb799b2542ad39140943a9a9da65_***_Djordje Peric
author Mokarram Hossain
Djordje Peric
author2 Mokarram Hossain
Rukshan Navaratne
Djordje Peric
format Journal article
container_title International Journal of Non-Linear Mechanics
container_volume 126
container_start_page 103546
publishDate 2020
institution Swansea University
issn 0020-7462
doi_str_mv 10.1016/j.ijnonlinmec.2020.103546
publisher Elsevier BV
document_store_str 1
active_str 0
description Digital Light Synthesis (DLS) technology creates ample opportunities for making 3D printed soft polymers for a wide range of grades and properties. In DLS, a 3D printer uses a continuous building technique in which the curing process is activated by an ultra-violet (UV) light. In this contribution, EUP40, a recently invented commercially available elastomeric polyurethane (EPU) printed by the DLS technology, is experimentally characterised. For characterizing the mechanical properties, an extensive viscoelastic experimental study on the digitally printed EPU taking the strain rate-dependence are conducted. The study reveals a significant time-dependency on its mechanical responses. Moreover, the material demonstrates noticeable nonlinear viscosities that depend on strain and strain rates. Based on the experimental findings for the printed elastomer, a large strain viscoelastic model is devised where evolution laws are enhanced by strain and strain rate-dependent nonlinear viscosities. Following identifications of relevant material parameters, we validate the model with the experimental data that show its good predictability. Such an extensive experimental study along with a constitutive model will help in designing and simulating more complex cellular and structured metamaterials using 3D printed elastomeric polyurethanes.
published_date 2020-11-01T04:04:11Z
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