Experimental and numerical investigation of flash-butt-welded joints in pearlitic-steel rails : fatigue and residual stress.

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorPorcaro, Rodrigo Rangel-
Autor(es): dc.creatorGodefroid, Leonardo Barbosa-
Autor(es): dc.creatorAraújo, Francisco Célio de-
Autor(es): dc.creatorFaria, Geraldo Lúcio de-
Autor(es): dc.creatorCândido, Luiz Cláudio-
Data de aceite: dc.date.accessioned2025-08-21T15:27:36Z-
Data de disponibilização: dc.date.available2025-08-21T15:27:36Z-
Data de envio: dc.date.issued2024-11-13-
Data de envio: dc.date.issued2024-11-13-
Data de envio: dc.date.issued2022-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/18980-
Fonte completa do material: dc.identifierhttps://doi.org/10.1590/1980-5373-MR-2023-0135-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1015525-
Descrição: dc.descriptionThis study is focused on the performance evaluation of flash-butt-welded rail joints concerning their mechanical strength and fatigue life. Residual stresses created in the heat-affected zone were measured and the effects of the welding process and notch sensitivity on the fatigue behavior in the weld region were experimentally assessed. Aiming at clarifying the physical phenomenon behind the flash-butt welding, nonlinear transient thermomechanical finite-element analyses were performed to reconstitute the welding process and to simulate the subsequent formation of residual stresses. A new hypothesis for explaining higher temperatures in the rail web than in the rail foot and head was suggested and numerically verified. Experimental fatigue results showed high notch sensitivity and highlighted the effects of microstructure variations on the fatigue life. In general, a good agreement was achieved between numerical and experimental measurements of residual stresses, which was essential for understanding the fatigue phenomenon and the formation of residual stresses in flash-butt-welded rail joints. A relevant outcome is the simulation of the hot burrs from the welding process as prescribed heat inputs on a convenient part of the rail surface. This simulation strategy has shown adequate to explain the non-uniform temperature changes and the corresponding originated residual stresses.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsaberto-
Direitos: dc.rightsThis 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/). Fonte: PDF do artigo.-
Palavras-chave: dc.subjectNotch sensitivity-
Palavras-chave: dc.subjectNonlinear transient thermal-
Título: dc.titleExperimental and numerical investigation of flash-butt-welded joints in pearlitic-steel rails : fatigue and residual stress.-
Aparece nas coleções:Repositório Institucional - UFOP

Não existem arquivos associados a este item.