Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix

We conducted an in situ study on CFRP fracturing process using atomic-force-microscopy-based stress-sensitive indentation. Tensile stress distribution during fracture initiation and propagation was directly observed quantitatively. It led to a discovery that previously believed catastrophic fracture...

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Autores principales: Wang, Hongxin, Zhang, Han, Goto, Kenta, Watanabe, Ikumu, Kitazawa, Hideaki, Kawai, Masamichi, Mamiya, Hiroaki, Fujita, Daisuke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Taylor & Francis 2020
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7269064/
https://www.ncbi.nlm.nih.gov/pubmed/32537033
http://dx.doi.org/10.1080/14686996.2020.1752114
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author Wang, Hongxin
Zhang, Han
Goto, Kenta
Watanabe, Ikumu
Kitazawa, Hideaki
Kawai, Masamichi
Mamiya, Hiroaki
Fujita, Daisuke
author_facet Wang, Hongxin
Zhang, Han
Goto, Kenta
Watanabe, Ikumu
Kitazawa, Hideaki
Kawai, Masamichi
Mamiya, Hiroaki
Fujita, Daisuke
author_sort Wang, Hongxin
collection PubMed
description We conducted an in situ study on CFRP fracturing process using atomic-force-microscopy-based stress-sensitive indentation. Tensile stress distribution during fracture initiation and propagation was directly observed quantitatively. It led to a discovery that previously believed catastrophic fracture of individual carbon fiber develops in a controllable manner in the polymer matrix, exhibiting 10 times increase of fracture toughness. Plastic deformation in crack-bridging polymer matrix was accounted for the toughening mechanism. The model was applied to explain low temperature strength weakening of CFRP bulk material when matrix plasticity was intentionally ‘shut down’ by cryogenic cooling.
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spelling pubmed-72690642020-06-11 Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix Wang, Hongxin Zhang, Han Goto, Kenta Watanabe, Ikumu Kitazawa, Hideaki Kawai, Masamichi Mamiya, Hiroaki Fujita, Daisuke Sci Technol Adv Mater Research Article We conducted an in situ study on CFRP fracturing process using atomic-force-microscopy-based stress-sensitive indentation. Tensile stress distribution during fracture initiation and propagation was directly observed quantitatively. It led to a discovery that previously believed catastrophic fracture of individual carbon fiber develops in a controllable manner in the polymer matrix, exhibiting 10 times increase of fracture toughness. Plastic deformation in crack-bridging polymer matrix was accounted for the toughening mechanism. The model was applied to explain low temperature strength weakening of CFRP bulk material when matrix plasticity was intentionally ‘shut down’ by cryogenic cooling. Taylor & Francis 2020-05-12 /pmc/articles/PMC7269064/ /pubmed/32537033 http://dx.doi.org/10.1080/14686996.2020.1752114 Text en © 2020 The Author(s). Published by National Institute for Materials Science in partnership with Taylor & Francis Group. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Wang, Hongxin
Zhang, Han
Goto, Kenta
Watanabe, Ikumu
Kitazawa, Hideaki
Kawai, Masamichi
Mamiya, Hiroaki
Fujita, Daisuke
Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix
title Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix
title_full Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix
title_fullStr Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix
title_full_unstemmed Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix
title_short Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix
title_sort stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7269064/
https://www.ncbi.nlm.nih.gov/pubmed/32537033
http://dx.doi.org/10.1080/14686996.2020.1752114
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