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Weld Magnification Factor Approach in Cruciform Joints Considering Post Welding Cooling Medium and Weld Size
The objective of this research is to develop an experimental-theoretical analysis about the influence of the cooling medium and the geometry of the welding bead profile in fatigue life and the associated parameters with structural integrity of welded joints. A welded joint with cruciform geometry is...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5793579/ https://www.ncbi.nlm.nih.gov/pubmed/29304033 http://dx.doi.org/10.3390/ma11010081 |
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author | Araque, Oscar Arzola, Nelson |
author_facet | Araque, Oscar Arzola, Nelson |
author_sort | Araque, Oscar |
collection | PubMed |
description | The objective of this research is to develop an experimental-theoretical analysis about the influence of the cooling medium and the geometry of the welding bead profile in fatigue life and the associated parameters with structural integrity of welded joints. A welded joint with cruciform geometry is considered using SMAW (Shielded Metal ArcWelding), plates in structural steel ASTM A36 HR of 8 mm of thickness, and E6013 electrode input. A three-dimensional computational model of the cruciform joint was created using the finite element method. For this model, the surface undulation of the cord and differentiation in the mechanical properties of the fusion zone were considered, the heat-affected zone (HAZ) and base material, respectively. In addition, an initial residual stress field, which was established experimentally, was considered. The results were a set of analytical expressions for the weld magnification factor M(k). It was found that values for the latter decrease markedly in function of the intensity of the cooling medium used in the post welding cooling phase, mainly due to the effect of the residual compressive stresses. The obtained models of behavior of the weld magnification factor are compared with the results from other researchers with some small differences, mainly due to the inclusion of the cooling effect of the post weld and the variation of the leg of the weld bead. The obtained analytical equations in the present research for M(k) can be used in management models of life and structural integrity for this type of welded joint. |
format | Online Article Text |
id | pubmed-5793579 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-57935792018-02-07 Weld Magnification Factor Approach in Cruciform Joints Considering Post Welding Cooling Medium and Weld Size Araque, Oscar Arzola, Nelson Materials (Basel) Article The objective of this research is to develop an experimental-theoretical analysis about the influence of the cooling medium and the geometry of the welding bead profile in fatigue life and the associated parameters with structural integrity of welded joints. A welded joint with cruciform geometry is considered using SMAW (Shielded Metal ArcWelding), plates in structural steel ASTM A36 HR of 8 mm of thickness, and E6013 electrode input. A three-dimensional computational model of the cruciform joint was created using the finite element method. For this model, the surface undulation of the cord and differentiation in the mechanical properties of the fusion zone were considered, the heat-affected zone (HAZ) and base material, respectively. In addition, an initial residual stress field, which was established experimentally, was considered. The results were a set of analytical expressions for the weld magnification factor M(k). It was found that values for the latter decrease markedly in function of the intensity of the cooling medium used in the post welding cooling phase, mainly due to the effect of the residual compressive stresses. The obtained models of behavior of the weld magnification factor are compared with the results from other researchers with some small differences, mainly due to the inclusion of the cooling effect of the post weld and the variation of the leg of the weld bead. The obtained analytical equations in the present research for M(k) can be used in management models of life and structural integrity for this type of welded joint. MDPI 2018-01-05 /pmc/articles/PMC5793579/ /pubmed/29304033 http://dx.doi.org/10.3390/ma11010081 Text en © 2018 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 Araque, Oscar Arzola, Nelson Weld Magnification Factor Approach in Cruciform Joints Considering Post Welding Cooling Medium and Weld Size |
title | Weld Magnification Factor Approach in Cruciform Joints Considering Post Welding Cooling Medium and Weld Size |
title_full | Weld Magnification Factor Approach in Cruciform Joints Considering Post Welding Cooling Medium and Weld Size |
title_fullStr | Weld Magnification Factor Approach in Cruciform Joints Considering Post Welding Cooling Medium and Weld Size |
title_full_unstemmed | Weld Magnification Factor Approach in Cruciform Joints Considering Post Welding Cooling Medium and Weld Size |
title_short | Weld Magnification Factor Approach in Cruciform Joints Considering Post Welding Cooling Medium and Weld Size |
title_sort | weld magnification factor approach in cruciform joints considering post welding cooling medium and weld size |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5793579/ https://www.ncbi.nlm.nih.gov/pubmed/29304033 http://dx.doi.org/10.3390/ma11010081 |
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