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A study of laser surface treatment in bonded repair of composite aircraft structures
Surface pre-treatment is one of the key processes in bonded repair of aircraft carbon fibre reinforced polymer composites. This paper investigates the surface modification of physical and chemical properties by laser ablation and conventional polish treatment techniques. Surface morphology analysed...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society Publishing
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5882672/ https://www.ncbi.nlm.nih.gov/pubmed/29657748 http://dx.doi.org/10.1098/rsos.171272 |
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author | Li, Shaolong Sun, Ting Liu, Chang Yang, Wenfeng Tang, Qingru |
author_facet | Li, Shaolong Sun, Ting Liu, Chang Yang, Wenfeng Tang, Qingru |
author_sort | Li, Shaolong |
collection | PubMed |
description | Surface pre-treatment is one of the key processes in bonded repair of aircraft carbon fibre reinforced polymer composites. This paper investigates the surface modification of physical and chemical properties by laser ablation and conventional polish treatment techniques. Surface morphology analysed by laser scanning confocal microscopy and scanning electron microscopy showed that a laser-treated surface displayed higher roughness than that of a polish-treated specimen. The laser-treated laminate exhibited more functional groups in the form of O 1 s/C 1 s atomic ratio of 30.89% for laser-treated and 20.14% for polish-treated as evidenced by X-ray photoelectron spectroscopy observation. Contact angle goniometry demonstrated that laser treatment can provide increased surface free energy and wettability. In the light of mechanical interlocking, molecular bonding and thermodynamics theories on adhesion, laser etching process displayed enhanced bonding performance relative to the polishing surface treatment. These properties resulted in an increased single lap shear strength and a cohesive failure mode for laser etching while an adhesive failure mode occurred in polish-treated specimen. |
format | Online Article Text |
id | pubmed-5882672 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-58826722018-04-13 A study of laser surface treatment in bonded repair of composite aircraft structures Li, Shaolong Sun, Ting Liu, Chang Yang, Wenfeng Tang, Qingru R Soc Open Sci Engineering Surface pre-treatment is one of the key processes in bonded repair of aircraft carbon fibre reinforced polymer composites. This paper investigates the surface modification of physical and chemical properties by laser ablation and conventional polish treatment techniques. Surface morphology analysed by laser scanning confocal microscopy and scanning electron microscopy showed that a laser-treated surface displayed higher roughness than that of a polish-treated specimen. The laser-treated laminate exhibited more functional groups in the form of O 1 s/C 1 s atomic ratio of 30.89% for laser-treated and 20.14% for polish-treated as evidenced by X-ray photoelectron spectroscopy observation. Contact angle goniometry demonstrated that laser treatment can provide increased surface free energy and wettability. In the light of mechanical interlocking, molecular bonding and thermodynamics theories on adhesion, laser etching process displayed enhanced bonding performance relative to the polishing surface treatment. These properties resulted in an increased single lap shear strength and a cohesive failure mode for laser etching while an adhesive failure mode occurred in polish-treated specimen. The Royal Society Publishing 2018-03-21 /pmc/articles/PMC5882672/ /pubmed/29657748 http://dx.doi.org/10.1098/rsos.171272 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Engineering Li, Shaolong Sun, Ting Liu, Chang Yang, Wenfeng Tang, Qingru A study of laser surface treatment in bonded repair of composite aircraft structures |
title | A study of laser surface treatment in bonded repair of composite aircraft structures |
title_full | A study of laser surface treatment in bonded repair of composite aircraft structures |
title_fullStr | A study of laser surface treatment in bonded repair of composite aircraft structures |
title_full_unstemmed | A study of laser surface treatment in bonded repair of composite aircraft structures |
title_short | A study of laser surface treatment in bonded repair of composite aircraft structures |
title_sort | study of laser surface treatment in bonded repair of composite aircraft structures |
topic | Engineering |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5882672/ https://www.ncbi.nlm.nih.gov/pubmed/29657748 http://dx.doi.org/10.1098/rsos.171272 |
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