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Mechanical characterisation of additively manufactured elastomeric structures for variable strain rate applications

Michael Robinson, Shwe Soe, Richard Johnston Orcid Logo, Rhosslyn Adams, Benjamin Hanna, Roy Burek, Graham McShane, Rafael Celeghini, Marcilio Alves, Peter Theobald

Additive Manufacturing, Volume: 27, Pages: 398 - 407

Swansea University Author: Richard Johnston Orcid Logo

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DOI (Published version): 10.1016/j.addma.2019.03.022

Abstract

Additive manufacturing (AM) enables production of geometrically-complex elastomeric structures. The elastic recovery and strain-rate dependence of these materials means they are ideal for use in dynamic, repetitive mechanical loading. Their process-dependence, and the frequent emergence of new AM el...

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Published in: Additive Manufacturing
ISSN: 2214-8604
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa49784
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spelling 2019-05-01T09:32:31.8889716 v2 49784 2019-03-28 Mechanical characterisation of additively manufactured elastomeric structures for variable strain rate applications 23282e7acce87dd926b8a62ae410a393 0000-0003-1977-6418 Richard Johnston Richard Johnston true false 2019-03-28 MTLS Additive manufacturing (AM) enables production of geometrically-complex elastomeric structures. The elastic recovery and strain-rate dependence of these materials means they are ideal for use in dynamic, repetitive mechanical loading. Their process-dependence, and the frequent emergence of new AM elastomers, commonly necessitates full material characterisation; however, accessing specialised equipment means this is often a time-consuming and expensive process. This work presents an innovative equi-biaxial rig that enables full characterisation via just a conventional material testing machine (supplementing uni-axial tension and planar tension tests). Combined with stress relaxation data, this provides a novel route for hyperelastic material modelling with viscoelastic components. This approach was validated by recording the force-displacement and deformation histories from finite element modelling a honeycomb structure. These data compared favourably to experimental quasistatic and dynamic compression testing, validating this novel and convenient route for characterising complex elastomeric materials. Supported by data describing the potential for high build-quality production using an AM process with low barriers to entry, this study should serve to encourage greater exploitation of this emerging manufacturing process for fabricating elastomeric structures within industrial communities. Journal Article Additive Manufacturing 27 398 407 2214-8604 Elastomeric Polymer Characterisation, Hyperelastic, High strain-rate FEA analysis, Cellular Structures, Viscoelastic 31 5 2019 2019-05-31 10.1016/j.addma.2019.03.022 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2019-05-01T09:32:31.8889716 2019-03-28T09:43:02.1509868 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Michael Robinson 1 Shwe Soe 2 Richard Johnston 0000-0003-1977-6418 3 Rhosslyn Adams 4 Benjamin Hanna 5 Roy Burek 6 Graham McShane 7 Rafael Celeghini 8 Marcilio Alves 9 Peter Theobald 10 0049784-28032019095106.pdf robinson2019.pdf 2019-03-28T09:51:06.4070000 Output 14236612 application/pdf Accepted Manuscript true 2020-03-25T00:00:00.0000000 true eng
title Mechanical characterisation of additively manufactured elastomeric structures for variable strain rate applications
spellingShingle Mechanical characterisation of additively manufactured elastomeric structures for variable strain rate applications
Richard Johnston
title_short Mechanical characterisation of additively manufactured elastomeric structures for variable strain rate applications
title_full Mechanical characterisation of additively manufactured elastomeric structures for variable strain rate applications
title_fullStr Mechanical characterisation of additively manufactured elastomeric structures for variable strain rate applications
title_full_unstemmed Mechanical characterisation of additively manufactured elastomeric structures for variable strain rate applications
title_sort Mechanical characterisation of additively manufactured elastomeric structures for variable strain rate applications
author_id_str_mv 23282e7acce87dd926b8a62ae410a393
author_id_fullname_str_mv 23282e7acce87dd926b8a62ae410a393_***_Richard Johnston
author Richard Johnston
author2 Michael Robinson
Shwe Soe
Richard Johnston
Rhosslyn Adams
Benjamin Hanna
Roy Burek
Graham McShane
Rafael Celeghini
Marcilio Alves
Peter Theobald
format Journal article
container_title Additive Manufacturing
container_volume 27
container_start_page 398
publishDate 2019
institution Swansea University
issn 2214-8604
doi_str_mv 10.1016/j.addma.2019.03.022
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 Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description Additive manufacturing (AM) enables production of geometrically-complex elastomeric structures. The elastic recovery and strain-rate dependence of these materials means they are ideal for use in dynamic, repetitive mechanical loading. Their process-dependence, and the frequent emergence of new AM elastomers, commonly necessitates full material characterisation; however, accessing specialised equipment means this is often a time-consuming and expensive process. This work presents an innovative equi-biaxial rig that enables full characterisation via just a conventional material testing machine (supplementing uni-axial tension and planar tension tests). Combined with stress relaxation data, this provides a novel route for hyperelastic material modelling with viscoelastic components. This approach was validated by recording the force-displacement and deformation histories from finite element modelling a honeycomb structure. These data compared favourably to experimental quasistatic and dynamic compression testing, validating this novel and convenient route for characterising complex elastomeric materials. Supported by data describing the potential for high build-quality production using an AM process with low barriers to entry, this study should serve to encourage greater exploitation of this emerging manufacturing process for fabricating elastomeric structures within industrial communities.
published_date 2019-05-31T04:01:00Z
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score 11.013148

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