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Numerical Analysis of Fracture Failure Behavior of Refractory Lining in Coal-Water Slurry Gasifier
[Image: see text] Fatigue crack fracture is one of the main reasons for the failure of a refractory lining in a coal-water slurry gasifier. To explore the fracture failure behavior of a refractory lining during the operation of a gasifier, the stress intensity factor (SIF) and J-integral at crack fr...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9161420/ https://www.ncbi.nlm.nih.gov/pubmed/35664589 http://dx.doi.org/10.1021/acsomega.2c01487 |
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author | Gao, Jinghong Shi, Yuchen Su, Weiguang Song, Xudong Wang, Jiaofei Yu, Guangsuo |
author_facet | Gao, Jinghong Shi, Yuchen Su, Weiguang Song, Xudong Wang, Jiaofei Yu, Guangsuo |
author_sort | Gao, Jinghong |
collection | PubMed |
description | [Image: see text] Fatigue crack fracture is one of the main reasons for the failure of a refractory lining in a coal-water slurry gasifier. To explore the fracture failure behavior of a refractory lining during the operation of a gasifier, the stress intensity factor (SIF) and J-integral at crack front were calculated by the finite element method, and a crack growth model for the refractory was established. At the same time, the effects of different crack length, depth, and angle on the stress and SIF, as well as J-integral distribution around the crack-tip, were presented. The simulation results demonstrated that very large stresses occurring at the crack tip and the distribution regulation of K(I) and J-integral along the crack front for surface cracks were similar. The maximum values occurred near the two ends of the crack (θ = 0°, 180°), and the minimum values appeared near the deepest crack front (θ = 90°). K(I) and J-integral values at the same position increase with increasing crack length and depth and decrease with the angle of crack when the a/c was kept constant. Furthermore, J-integral results indicated that excessive crack depths were likely to cause destabilizing crack growth. These results have provided a reliable theoretical basis for fracture analysis and life prediction of the refractory lining in a gasifier. |
format | Online Article Text |
id | pubmed-9161420 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-91614202022-06-03 Numerical Analysis of Fracture Failure Behavior of Refractory Lining in Coal-Water Slurry Gasifier Gao, Jinghong Shi, Yuchen Su, Weiguang Song, Xudong Wang, Jiaofei Yu, Guangsuo ACS Omega [Image: see text] Fatigue crack fracture is one of the main reasons for the failure of a refractory lining in a coal-water slurry gasifier. To explore the fracture failure behavior of a refractory lining during the operation of a gasifier, the stress intensity factor (SIF) and J-integral at crack front were calculated by the finite element method, and a crack growth model for the refractory was established. At the same time, the effects of different crack length, depth, and angle on the stress and SIF, as well as J-integral distribution around the crack-tip, were presented. The simulation results demonstrated that very large stresses occurring at the crack tip and the distribution regulation of K(I) and J-integral along the crack front for surface cracks were similar. The maximum values occurred near the two ends of the crack (θ = 0°, 180°), and the minimum values appeared near the deepest crack front (θ = 90°). K(I) and J-integral values at the same position increase with increasing crack length and depth and decrease with the angle of crack when the a/c was kept constant. Furthermore, J-integral results indicated that excessive crack depths were likely to cause destabilizing crack growth. These results have provided a reliable theoretical basis for fracture analysis and life prediction of the refractory lining in a gasifier. American Chemical Society 2022-05-18 /pmc/articles/PMC9161420/ /pubmed/35664589 http://dx.doi.org/10.1021/acsomega.2c01487 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Gao, Jinghong Shi, Yuchen Su, Weiguang Song, Xudong Wang, Jiaofei Yu, Guangsuo Numerical Analysis of Fracture Failure Behavior of Refractory Lining in Coal-Water Slurry Gasifier |
title | Numerical Analysis of Fracture Failure Behavior of
Refractory Lining in Coal-Water Slurry Gasifier |
title_full | Numerical Analysis of Fracture Failure Behavior of
Refractory Lining in Coal-Water Slurry Gasifier |
title_fullStr | Numerical Analysis of Fracture Failure Behavior of
Refractory Lining in Coal-Water Slurry Gasifier |
title_full_unstemmed | Numerical Analysis of Fracture Failure Behavior of
Refractory Lining in Coal-Water Slurry Gasifier |
title_short | Numerical Analysis of Fracture Failure Behavior of
Refractory Lining in Coal-Water Slurry Gasifier |
title_sort | numerical analysis of fracture failure behavior of
refractory lining in coal-water slurry gasifier |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9161420/ https://www.ncbi.nlm.nih.gov/pubmed/35664589 http://dx.doi.org/10.1021/acsomega.2c01487 |
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