Cargando…
The Evolution of Residual Stress in Rib-Diaphragm Joints of Orthotropic Steel Decks Subjected to Thermal Cutting and Welding
Residual stresses change the stress ratio of fluctuating stresses, hence seriously affect the fatigue life of orthotropic steel decks (OSDs) under traffic loading. Residual stress distributions near the U rib-diaphragm joints are very complicated and need to be investigated further. In this paper, a...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7503630/ https://www.ncbi.nlm.nih.gov/pubmed/32872182 http://dx.doi.org/10.3390/ma13173804 |
_version_ | 1783584438653812736 |
---|---|
author | Xiong, Yongming Li, Chuanxi Chen, Zhuoyi He, Jun Xin, Haohui |
author_facet | Xiong, Yongming Li, Chuanxi Chen, Zhuoyi He, Jun Xin, Haohui |
author_sort | Xiong, Yongming |
collection | PubMed |
description | Residual stresses change the stress ratio of fluctuating stresses, hence seriously affect the fatigue life of orthotropic steel decks (OSDs) under traffic loading. Residual stress distributions near the U rib-diaphragm joints are very complicated and need to be investigated further. In this paper, a systematic method has been proposed for calculating the residual stress field in the joint of U rib and diaphragm due to thermal cutting and welding. Firstly, a mathematical model of cutting heat sources was established to predict the temperature field. Then, a numerical elastoplastic thermomechanical model was built to predict the residual stress evolutions in a diaphragm-rib joint through the whole fabrication process involving flame cutting and welding. Moreover, the simulated temperature contours at the fusion zone and the residual stress distributions in the rib-diaphragm joint were compared and verified against the experimental ones. The numerical results showed a great agreement with the experimental ones, indicating that the heat source model can be used to accurately predict the temperature field during flame cutting. Finally, the validated numerical model was utilized to conduct parametrical analyses on the effects of thermal processing rates, e.g., the cutting and welding speeds and on the residual stress distribution in the rib-diaphragm joint. The results indicate that a faster cutting speed and a slower welding speed can decrease the residual stress magnitude at the rib-diaphragm joints and reduce the high-stress zone near the diaphragm cutouts. |
format | Online Article Text |
id | pubmed-7503630 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-75036302020-09-27 The Evolution of Residual Stress in Rib-Diaphragm Joints of Orthotropic Steel Decks Subjected to Thermal Cutting and Welding Xiong, Yongming Li, Chuanxi Chen, Zhuoyi He, Jun Xin, Haohui Materials (Basel) Article Residual stresses change the stress ratio of fluctuating stresses, hence seriously affect the fatigue life of orthotropic steel decks (OSDs) under traffic loading. Residual stress distributions near the U rib-diaphragm joints are very complicated and need to be investigated further. In this paper, a systematic method has been proposed for calculating the residual stress field in the joint of U rib and diaphragm due to thermal cutting and welding. Firstly, a mathematical model of cutting heat sources was established to predict the temperature field. Then, a numerical elastoplastic thermomechanical model was built to predict the residual stress evolutions in a diaphragm-rib joint through the whole fabrication process involving flame cutting and welding. Moreover, the simulated temperature contours at the fusion zone and the residual stress distributions in the rib-diaphragm joint were compared and verified against the experimental ones. The numerical results showed a great agreement with the experimental ones, indicating that the heat source model can be used to accurately predict the temperature field during flame cutting. Finally, the validated numerical model was utilized to conduct parametrical analyses on the effects of thermal processing rates, e.g., the cutting and welding speeds and on the residual stress distribution in the rib-diaphragm joint. The results indicate that a faster cutting speed and a slower welding speed can decrease the residual stress magnitude at the rib-diaphragm joints and reduce the high-stress zone near the diaphragm cutouts. MDPI 2020-08-28 /pmc/articles/PMC7503630/ /pubmed/32872182 http://dx.doi.org/10.3390/ma13173804 Text en © 2020 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 Xiong, Yongming Li, Chuanxi Chen, Zhuoyi He, Jun Xin, Haohui The Evolution of Residual Stress in Rib-Diaphragm Joints of Orthotropic Steel Decks Subjected to Thermal Cutting and Welding |
title | The Evolution of Residual Stress in Rib-Diaphragm Joints of Orthotropic Steel Decks Subjected to Thermal Cutting and Welding |
title_full | The Evolution of Residual Stress in Rib-Diaphragm Joints of Orthotropic Steel Decks Subjected to Thermal Cutting and Welding |
title_fullStr | The Evolution of Residual Stress in Rib-Diaphragm Joints of Orthotropic Steel Decks Subjected to Thermal Cutting and Welding |
title_full_unstemmed | The Evolution of Residual Stress in Rib-Diaphragm Joints of Orthotropic Steel Decks Subjected to Thermal Cutting and Welding |
title_short | The Evolution of Residual Stress in Rib-Diaphragm Joints of Orthotropic Steel Decks Subjected to Thermal Cutting and Welding |
title_sort | evolution of residual stress in rib-diaphragm joints of orthotropic steel decks subjected to thermal cutting and welding |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7503630/ https://www.ncbi.nlm.nih.gov/pubmed/32872182 http://dx.doi.org/10.3390/ma13173804 |
work_keys_str_mv | AT xiongyongming theevolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding AT lichuanxi theevolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding AT chenzhuoyi theevolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding AT hejun theevolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding AT xinhaohui theevolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding AT xiongyongming evolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding AT lichuanxi evolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding AT chenzhuoyi evolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding AT hejun evolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding AT xinhaohui evolutionofresidualstressinribdiaphragmjointsoforthotropicsteeldeckssubjectedtothermalcuttingandwelding |