Influence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental tests

This paper deals with the development of a Finite Element (FE) model for the simulation of a two-passes V-groove butt weld joint. Specifically, in order to reduce the computational costs and the efforts aimed to the numerical evaluation of residual stresses distribution in welded joints, a sensitivi...

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Autores principales:	R. Sepe, A. Greco, A. De Luca, F. Caputo, F. Berto
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Residual stresses Welded joint Material properties Finite element method Structural steel Mechanics of engineering. Applied mechanics TA349-359 Technology T
Acceso en línea:	https://doaj.org/article/29c5d451b6cf48e9bc5c7ac6b2a20fc4
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spelling	oai:doaj.org-article:29c5d451b6cf48e9bc5c7ac6b2a20fc42021-11-18T04:51:51ZInfluence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental tests2666-359710.1016/j.finmec.2021.100018https://doaj.org/article/29c5d451b6cf48e9bc5c7ac6b2a20fc42021-10-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666359721000093https://doaj.org/toc/2666-3597This paper deals with the development of a Finite Element (FE) model for the simulation of a two-passes V-groove butt weld joint. Specifically, in order to reduce the computational costs and the efforts aimed to the numerical evaluation of residual stresses distribution in welded joints, a sensitivity analysis has been performed to quantify the level of accuracy provided by the model when the strict dependence of some material properties on the temperature is neglected. Before proceeding with the sensitivity analysis, the reliability of the proposed FE model was assessed against an experimental test; a good agreement between numerical and experiment results has been achieved.In detail, the material properties involved in this sensitivity analysis are: thermal conductivity, specific heat, Young's modulus and thermal expansion coefficient; the investigated outputs are: temperatures, residual stresses, displacements and angular distortion. Several test cases have been simulated by considering all of these material properties as constant, one at a time or all together. The results analysis showed that the levels of accuracy provided by the different simplifications depend on the selected output. Among the most relevant results, it has been found out that the predicted temperatures distributions are not significantly influenced by the considered material simplifications. The effects on the residual stresses in considering the thermal conductivity and the specific heat as constant are negligible. The hypothesis of a constant thermal expansion coefficient provides an acceptable level of accuracy only in proximity of the weld seam. Finally, concerning the displacements field and the angular distortion of the welded plates, by considering the thermal conductivity and Young's modulus as constant, the effectiveness of the model appears to be compromised.R. SepeA. GrecoA. De LucaF. CaputoF. BertoElsevierarticleResidual stressesWelded jointMaterial propertiesFinite element methodStructural steelMechanics of engineering. Applied mechanicsTA349-359TechnologyTENForces in Mechanics, Vol 4, Iss , Pp 100018- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Residual stresses Welded joint Material properties Finite element method Structural steel Mechanics of engineering. Applied mechanics TA349-359 Technology T
spellingShingle	Residual stresses Welded joint Material properties Finite element method Structural steel Mechanics of engineering. Applied mechanics TA349-359 Technology T R. Sepe A. Greco A. De Luca F. Caputo F. Berto Influence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental tests
description	This paper deals with the development of a Finite Element (FE) model for the simulation of a two-passes V-groove butt weld joint. Specifically, in order to reduce the computational costs and the efforts aimed to the numerical evaluation of residual stresses distribution in welded joints, a sensitivity analysis has been performed to quantify the level of accuracy provided by the model when the strict dependence of some material properties on the temperature is neglected. Before proceeding with the sensitivity analysis, the reliability of the proposed FE model was assessed against an experimental test; a good agreement between numerical and experiment results has been achieved.In detail, the material properties involved in this sensitivity analysis are: thermal conductivity, specific heat, Young's modulus and thermal expansion coefficient; the investigated outputs are: temperatures, residual stresses, displacements and angular distortion. Several test cases have been simulated by considering all of these material properties as constant, one at a time or all together. The results analysis showed that the levels of accuracy provided by the different simplifications depend on the selected output. Among the most relevant results, it has been found out that the predicted temperatures distributions are not significantly influenced by the considered material simplifications. The effects on the residual stresses in considering the thermal conductivity and the specific heat as constant are negligible. The hypothesis of a constant thermal expansion coefficient provides an acceptable level of accuracy only in proximity of the weld seam. Finally, concerning the displacements field and the angular distortion of the welded plates, by considering the thermal conductivity and Young's modulus as constant, the effectiveness of the model appears to be compromised.
format	article
author	R. Sepe A. Greco A. De Luca F. Caputo F. Berto
author_facet	R. Sepe A. Greco A. De Luca F. Caputo F. Berto
author_sort	R. Sepe
title	Influence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental tests
title_short	Influence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental tests
title_full	Influence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental tests
title_fullStr	Influence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental tests
title_full_unstemmed	Influence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental tests
title_sort	influence of thermo-mechanical material properties on the structural response of a welded butt-joint by fem simulation and experimental tests
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/29c5d451b6cf48e9bc5c7ac6b2a20fc4
work_keys_str_mv	AT rsepe influenceofthermomechanicalmaterialpropertiesonthestructuralresponseofaweldedbuttjointbyfemsimulationandexperimentaltests AT agreco influenceofthermomechanicalmaterialpropertiesonthestructuralresponseofaweldedbuttjointbyfemsimulationandexperimentaltests AT adeluca influenceofthermomechanicalmaterialpropertiesonthestructuralresponseofaweldedbuttjointbyfemsimulationandexperimentaltests AT fcaputo influenceofthermomechanicalmaterialpropertiesonthestructuralresponseofaweldedbuttjointbyfemsimulationandexperimentaltests AT fberto influenceofthermomechanicalmaterialpropertiesonthestructuralresponseofaweldedbuttjointbyfemsimulationandexperimentaltests
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Influence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental tests

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