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Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method

Glass fiber-reinforced polymer (GFRP) composites are promising composites often utilized in coastal infrastructure or used as an alternative to steel reinforcement in seawater sea sand concrete due to their excellent corrosion resistance. Understanding the degradation mechanism of GFRP in corrosion...

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Autores principales: Zhang, Xiuli, Deng, Zongcai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9320332/
https://www.ncbi.nlm.nih.gov/pubmed/35890580
http://dx.doi.org/10.3390/polym14142804
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author Zhang, Xiuli
Deng, Zongcai
author_facet Zhang, Xiuli
Deng, Zongcai
author_sort Zhang, Xiuli
collection PubMed
description Glass fiber-reinforced polymer (GFRP) composites are promising composites often utilized in coastal infrastructure or used as an alternative to steel reinforcement in seawater sea sand concrete due to their excellent corrosion resistance. Understanding the degradation mechanism of GFRP in corrosion environments is significant for improving the long-term performance of GFRP materials. This paper presented the influences of seawater content and temperature on the properties of GFRP composites using the molecular dynamics method. The simulation results were validated by existing experiments on mechanical properties, interlaminar strength, and microstructures of an accelerated aging test of GFRP. The calculation results indicated that when seawater content of the matrix increased from 0% to 9.09% at 298 K, Young’s modulus, shear modulus, and bulk modulus decreased 46.72%, 53.46%, and 41.75%, respectively. The binding energy of GFRP composites with seawater content of 2.15% at 353 K was 26.46% lower than that of unconditioned GFRP at 298 K. It revealed that the higher seawater content and temperature accelerated the degradation of the GFRP composites. The investigation provided a comprehensive understanding of the degradation mechanism of GFRP in seawater environments and provided a basis for the durability design of GFRP composites.
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spelling pubmed-93203322022-07-27 Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method Zhang, Xiuli Deng, Zongcai Polymers (Basel) Article Glass fiber-reinforced polymer (GFRP) composites are promising composites often utilized in coastal infrastructure or used as an alternative to steel reinforcement in seawater sea sand concrete due to their excellent corrosion resistance. Understanding the degradation mechanism of GFRP in corrosion environments is significant for improving the long-term performance of GFRP materials. This paper presented the influences of seawater content and temperature on the properties of GFRP composites using the molecular dynamics method. The simulation results were validated by existing experiments on mechanical properties, interlaminar strength, and microstructures of an accelerated aging test of GFRP. The calculation results indicated that when seawater content of the matrix increased from 0% to 9.09% at 298 K, Young’s modulus, shear modulus, and bulk modulus decreased 46.72%, 53.46%, and 41.75%, respectively. The binding energy of GFRP composites with seawater content of 2.15% at 353 K was 26.46% lower than that of unconditioned GFRP at 298 K. It revealed that the higher seawater content and temperature accelerated the degradation of the GFRP composites. The investigation provided a comprehensive understanding of the degradation mechanism of GFRP in seawater environments and provided a basis for the durability design of GFRP composites. MDPI 2022-07-09 /pmc/articles/PMC9320332/ /pubmed/35890580 http://dx.doi.org/10.3390/polym14142804 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Xiuli
Deng, Zongcai
Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method
title Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method
title_full Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method
title_fullStr Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method
title_full_unstemmed Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method
title_short Effects of Seawater Environment on the Degradation of GFRP Composites by Molecular Dynamics Method
title_sort effects of seawater environment on the degradation of gfrp composites by molecular dynamics method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9320332/
https://www.ncbi.nlm.nih.gov/pubmed/35890580
http://dx.doi.org/10.3390/polym14142804
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