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Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth
For pre-corroded aluminum alloy 7075-T6, the interacting effects of two neighboring pits on the stress concentration are comprehensively analyzed by considering various relative position parameters (inclination angle θ and dimensionless spacing parameter λ) and pit depth (d) with the finite element...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506949/ https://www.ncbi.nlm.nih.gov/pubmed/28772758 http://dx.doi.org/10.3390/ma10040398 |
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author | Huang, Yongfang Gang, Tieqiang Chen, Lijie |
author_facet | Huang, Yongfang Gang, Tieqiang Chen, Lijie |
author_sort | Huang, Yongfang |
collection | PubMed |
description | For pre-corroded aluminum alloy 7075-T6, the interacting effects of two neighboring pits on the stress concentration are comprehensively analyzed by considering various relative position parameters (inclination angle θ and dimensionless spacing parameter λ) and pit depth (d) with the finite element method. According to the severity of the stress concentration, the critical corrosion regions, bearing high susceptibility to fatigue damage, are determined for intersecting and adjacent pits, respectively. A straightforward approach is accordingly proposed to conservatively estimate the combined stress concentration factor induced by two neighboring pits, and a concrete application example is presented. It is found that for intersecting pits, the normalized stress concentration factor K(tnor) increases with the increase of θ and λ and always reaches its maximum at θ = 90°, yet for adjacent pits, K(tnor) decreases with the increase of λ and the maximum value appears at a slight asymmetric location. The simulations reveal that K(tnor) follows a linear and an exponential relationship with the dimensionless depth parameter R(d) for intersecting and adjacent cases, respectively. |
format | Online Article Text |
id | pubmed-5506949 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-55069492017-07-28 Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth Huang, Yongfang Gang, Tieqiang Chen, Lijie Materials (Basel) Article For pre-corroded aluminum alloy 7075-T6, the interacting effects of two neighboring pits on the stress concentration are comprehensively analyzed by considering various relative position parameters (inclination angle θ and dimensionless spacing parameter λ) and pit depth (d) with the finite element method. According to the severity of the stress concentration, the critical corrosion regions, bearing high susceptibility to fatigue damage, are determined for intersecting and adjacent pits, respectively. A straightforward approach is accordingly proposed to conservatively estimate the combined stress concentration factor induced by two neighboring pits, and a concrete application example is presented. It is found that for intersecting pits, the normalized stress concentration factor K(tnor) increases with the increase of θ and λ and always reaches its maximum at θ = 90°, yet for adjacent pits, K(tnor) decreases with the increase of λ and the maximum value appears at a slight asymmetric location. The simulations reveal that K(tnor) follows a linear and an exponential relationship with the dimensionless depth parameter R(d) for intersecting and adjacent cases, respectively. MDPI 2017-04-09 /pmc/articles/PMC5506949/ /pubmed/28772758 http://dx.doi.org/10.3390/ma10040398 Text en © 2017 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Huang, Yongfang Gang, Tieqiang Chen, Lijie Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth |
title | Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth |
title_full | Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth |
title_fullStr | Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth |
title_full_unstemmed | Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth |
title_short | Interacting Effects Induced by Two Neighboring Pits Considering Relative Position Parameters and Pit Depth |
title_sort | interacting effects induced by two neighboring pits considering relative position parameters and pit depth |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506949/ https://www.ncbi.nlm.nih.gov/pubmed/28772758 http://dx.doi.org/10.3390/ma10040398 |
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