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Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases

New finite element analysis procedures are developed in this study to obtain the precise stress distribution patterns of prestressed composites. Within the FEM procedures, an equivalent thermal method is modified to realize the prestress application, and a multi-step methodology is developed to cons...

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Detalles Bibliográficos
Autores principales: Wang, Meng, Hang, Xiaochen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964311/
https://www.ncbi.nlm.nih.gov/pubmed/36836975
http://dx.doi.org/10.3390/ma16041345
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author Wang, Meng
Hang, Xiaochen
author_facet Wang, Meng
Hang, Xiaochen
author_sort Wang, Meng
collection PubMed
description New finite element analysis procedures are developed in this study to obtain the precise stress distribution patterns of prestressed composites. Within the FEM procedures, an equivalent thermal method is modified to realize the prestress application, and a multi-step methodology is developed to consider coupling effects of polymer curing and prestress application. Thereafter, the effects of interphases’ properties, including the elastic modulus and coefficient of thermal expansion (CTE), on the stress distribution patterns are revealed. Analytical methods for residual stress prediction are modified in this study to demonstrate the finite element analysis procedures. From the residual stress results, it is found that the increase in the prestress level tends to contribute to the initiation of interphase debonding. The increase in the elastic modulus or CTE of the interphase results in very large circumferential and axial stress values appearing in the interphase. When the elastic modulus in the interphase is heterogeneous, the predicted stress values in the fiber and matrix are similar to the results predicted with the equivalent elastic modulus of the interphases. However, the heterogeneous elastic modulus results in serious circumferential and axial stress gradients in the interphase.
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spelling pubmed-99643112023-02-26 Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases Wang, Meng Hang, Xiaochen Materials (Basel) Article New finite element analysis procedures are developed in this study to obtain the precise stress distribution patterns of prestressed composites. Within the FEM procedures, an equivalent thermal method is modified to realize the prestress application, and a multi-step methodology is developed to consider coupling effects of polymer curing and prestress application. Thereafter, the effects of interphases’ properties, including the elastic modulus and coefficient of thermal expansion (CTE), on the stress distribution patterns are revealed. Analytical methods for residual stress prediction are modified in this study to demonstrate the finite element analysis procedures. From the residual stress results, it is found that the increase in the prestress level tends to contribute to the initiation of interphase debonding. The increase in the elastic modulus or CTE of the interphase results in very large circumferential and axial stress values appearing in the interphase. When the elastic modulus in the interphase is heterogeneous, the predicted stress values in the fiber and matrix are similar to the results predicted with the equivalent elastic modulus of the interphases. However, the heterogeneous elastic modulus results in serious circumferential and axial stress gradients in the interphase. MDPI 2023-02-05 /pmc/articles/PMC9964311/ /pubmed/36836975 http://dx.doi.org/10.3390/ma16041345 Text en © 2023 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
Wang, Meng
Hang, Xiaochen
Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases
title Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases
title_full Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases
title_fullStr Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases
title_full_unstemmed Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases
title_short Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases
title_sort finite element analysis of residual stress distribution patterns of prestressed composites considering interphases
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964311/
https://www.ncbi.nlm.nih.gov/pubmed/36836975
http://dx.doi.org/10.3390/ma16041345
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