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Empirical Solution of Stress Intensity Factors for the Inclined Inner Surface Crack of Pipe under External Pressure and Axial Compression

Based on fracture mechanics theory, a finite element method was used to determine the stress intensity factors of the inclined crack on the inner surface of the pipe under axial compression load and external pressure. The effects of different influencing factors on the stress intensity factor along...

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Detalles Bibliográficos
Autores principales: Yao, Xi-Ming, Zhang, Yu-Chen, Pei, Qi, Jin, Li-Zhu, Ma, Tian-Hao, He, Xiao-Hua, Zhou, Chang-Yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9822444/
https://www.ncbi.nlm.nih.gov/pubmed/36614703
http://dx.doi.org/10.3390/ma16010364
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author Yao, Xi-Ming
Zhang, Yu-Chen
Pei, Qi
Jin, Li-Zhu
Ma, Tian-Hao
He, Xiao-Hua
Zhou, Chang-Yu
author_facet Yao, Xi-Ming
Zhang, Yu-Chen
Pei, Qi
Jin, Li-Zhu
Ma, Tian-Hao
He, Xiao-Hua
Zhou, Chang-Yu
author_sort Yao, Xi-Ming
collection PubMed
description Based on fracture mechanics theory, a finite element method was used to determine the stress intensity factors of the inclined crack on the inner surface of the pipe under axial compression load and external pressure. The effects of different influencing factors on the stress intensity factor along the crack front considering crack closure were systematically explored, which were different to those under internal pressure. The effects of high aspect ratio on K(II), the crack inclination asymmetry caused by curvature and the effects of the friction coefficient on the stress intensity factors of the pipe with an inclined inner surface crack under axial compression load and external pressure were explored in this paper. To be fit for defect assessment, the solutions for stress intensity factors K(II) and K(III) were derived, and new correction factors f(θ) and f(μ) were proposed in the empirical solutions to accommodate the crack inclination asymmetry and the friction coefficient, respectively.
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spelling pubmed-98224442023-01-07 Empirical Solution of Stress Intensity Factors for the Inclined Inner Surface Crack of Pipe under External Pressure and Axial Compression Yao, Xi-Ming Zhang, Yu-Chen Pei, Qi Jin, Li-Zhu Ma, Tian-Hao He, Xiao-Hua Zhou, Chang-Yu Materials (Basel) Article Based on fracture mechanics theory, a finite element method was used to determine the stress intensity factors of the inclined crack on the inner surface of the pipe under axial compression load and external pressure. The effects of different influencing factors on the stress intensity factor along the crack front considering crack closure were systematically explored, which were different to those under internal pressure. The effects of high aspect ratio on K(II), the crack inclination asymmetry caused by curvature and the effects of the friction coefficient on the stress intensity factors of the pipe with an inclined inner surface crack under axial compression load and external pressure were explored in this paper. To be fit for defect assessment, the solutions for stress intensity factors K(II) and K(III) were derived, and new correction factors f(θ) and f(μ) were proposed in the empirical solutions to accommodate the crack inclination asymmetry and the friction coefficient, respectively. MDPI 2022-12-30 /pmc/articles/PMC9822444/ /pubmed/36614703 http://dx.doi.org/10.3390/ma16010364 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
Yao, Xi-Ming
Zhang, Yu-Chen
Pei, Qi
Jin, Li-Zhu
Ma, Tian-Hao
He, Xiao-Hua
Zhou, Chang-Yu
Empirical Solution of Stress Intensity Factors for the Inclined Inner Surface Crack of Pipe under External Pressure and Axial Compression
title Empirical Solution of Stress Intensity Factors for the Inclined Inner Surface Crack of Pipe under External Pressure and Axial Compression
title_full Empirical Solution of Stress Intensity Factors for the Inclined Inner Surface Crack of Pipe under External Pressure and Axial Compression
title_fullStr Empirical Solution of Stress Intensity Factors for the Inclined Inner Surface Crack of Pipe under External Pressure and Axial Compression
title_full_unstemmed Empirical Solution of Stress Intensity Factors for the Inclined Inner Surface Crack of Pipe under External Pressure and Axial Compression
title_short Empirical Solution of Stress Intensity Factors for the Inclined Inner Surface Crack of Pipe under External Pressure and Axial Compression
title_sort empirical solution of stress intensity factors for the inclined inner surface crack of pipe under external pressure and axial compression
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9822444/
https://www.ncbi.nlm.nih.gov/pubmed/36614703
http://dx.doi.org/10.3390/ma16010364
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