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Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials / REBECCA BLOWS

Swansea University Author: REBECCA BLOWS

DOI (Published version): 10.23889/SUthesis.58630

Abstract

The increasing popularity of carbon fibre reinforced polymers means that enhancement of material properties is of high commercial value. Thin-ply technology is one area of research focussed on achieving this goal. The aim of this work was to investigate the use of thin-ply technology by studying the...

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Published: Swansea 2021
Institution: Swansea University
Degree level: Doctoral
Degree name: EngD
Supervisor: Arnold, Cris ; Havard, Geraint
URI: https://cronfa.swan.ac.uk/Record/cronfa58630
first_indexed 2021-11-12T13:17:39Z
last_indexed 2021-11-13T04:25:41Z
id cronfa58630
recordtype RisThesis
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spelling 2021-11-12T13:36:36.6793629 v2 58630 2021-11-12 Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials 5c8c29c8d968e6355bb82379c2be335c REBECCA BLOWS REBECCA BLOWS true false 2021-11-12 The increasing popularity of carbon fibre reinforced polymers means that enhancement of material properties is of high commercial value. Thin-ply technology is one area of research focussed on achieving this goal. The aim of this work was to investigate the use of thin-ply technology by studying the effect of ply thickness on the physical and mechanical properties of carbon fibre composite materials, after exposure to various environmental conditions. A review of mechanical properties at ambient conditions and after exposure to both high temperature and moisture was conducted. Quasi-isotropic thin-ply carbon fibre composites were found to have enhanced mechanical properties, compared to thicker ply materials comprising the same resin and matrix, under various loading conditions. One of the main mechanisms for this is thought to be the lower interfacial stresses seen with thin-ply materials, as demonstrated through the use of high-speed camera video recording and digital image correlation. An investigation into the effect of ply thickness on moisture absorption and diffusion rate was also conducted. For the material under investigation, diffusion rates remained constant with changes to ply thickness, whereas moisture absorption was greater for the thinner ply material. In addition, the effect of ply thickness on viscoelastic properties was also studied. The use of dynamic mechanical analysis suggested that the material under investigation tended to a two-phase state. This is thought to be the result of phase-separation of the epoxy resin matrix and poly-ether-sulfone (PES) toughening particles. Ply thickness was shown to have some effect on the phase separation of epoxy and PES. E-Thesis Swansea Carbon fibre composite, thin-ply, environmental conditioning, moisture, high-temperature, thermal analysis 12 11 2021 2021-11-12 10.23889/SUthesis.58630 ORCiD identifier: https://orcid.org/0000-0002-4969-2955 COLLEGE NANME COLLEGE CODE Swansea University Arnold, Cris ; Havard, Geraint Doctoral EngD R-TECH Materials 2021-11-12T13:36:36.6793629 2021-11-12T13:14:15.1219122 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised REBECCA BLOWS 1 58630__21507__43b3654a01204a22a07a905ac788897d.pdf Blows_Rebecca_A_EngD_Thesis_Final_Redacted_Signature.pdf 2021-11-12T13:30:27.9613307 Output 12221754 application/pdf E-Thesis – open access true Copyright: The author, Rebecca A. Blows, 2020. true eng
title Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials
spellingShingle Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials
REBECCA BLOWS
title_short Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials
title_full Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials
title_fullStr Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials
title_full_unstemmed Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials
title_sort Development of Novel Thin-Ply Technology for Carbon Fibre Composite Materials
author_id_str_mv 5c8c29c8d968e6355bb82379c2be335c
author_id_fullname_str_mv 5c8c29c8d968e6355bb82379c2be335c_***_REBECCA BLOWS
author REBECCA BLOWS
author2 REBECCA BLOWS
format E-Thesis
publishDate 2021
institution Swansea University
doi_str_mv 10.23889/SUthesis.58630
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 - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description The increasing popularity of carbon fibre reinforced polymers means that enhancement of material properties is of high commercial value. Thin-ply technology is one area of research focussed on achieving this goal. The aim of this work was to investigate the use of thin-ply technology by studying the effect of ply thickness on the physical and mechanical properties of carbon fibre composite materials, after exposure to various environmental conditions. A review of mechanical properties at ambient conditions and after exposure to both high temperature and moisture was conducted. Quasi-isotropic thin-ply carbon fibre composites were found to have enhanced mechanical properties, compared to thicker ply materials comprising the same resin and matrix, under various loading conditions. One of the main mechanisms for this is thought to be the lower interfacial stresses seen with thin-ply materials, as demonstrated through the use of high-speed camera video recording and digital image correlation. An investigation into the effect of ply thickness on moisture absorption and diffusion rate was also conducted. For the material under investigation, diffusion rates remained constant with changes to ply thickness, whereas moisture absorption was greater for the thinner ply material. In addition, the effect of ply thickness on viscoelastic properties was also studied. The use of dynamic mechanical analysis suggested that the material under investigation tended to a two-phase state. This is thought to be the result of phase-separation of the epoxy resin matrix and poly-ether-sulfone (PES) toughening particles. Ply thickness was shown to have some effect on the phase separation of epoxy and PES.
published_date 2021-11-12T07:37:19Z
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score 11.104692

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