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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-10-01
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| Series: | Forces in Mechanics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666359721000093 |
| _version_ | 1798033151637848064 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-11T20:24:39Z |
| format | Article |
| id | doaj.art-29c5d451b6cf48e9bc5c7ac6b2a20fc4 |
| institution | Directory Open Access Journal |
| issn | 2666-3597 |
| language | English |
| last_indexed | 2024-04-11T20:24:39Z |
| publishDate | 2021-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Forces in Mechanics |
| spelling | doaj.art-29c5d451b6cf48e9bc5c7ac6b2a20fc42022-12-22T04:04:41ZengElsevierForces in Mechanics2666-35972021-10-014100018Influence of thermo-mechanical material properties on the structural response of a welded butt-joint by FEM simulation and experimental testsR. Sepe0A. Greco1A. De Luca2F. Caputo3F. Berto4Department of Industrial Engineering, University of Salerno, Via G. Paolo II, 132, 84084 Fisciano, Italy; Corresponding author.Department of Industrial Engineering, University of Salerno, Via G. Paolo II, 132, 84084 Fisciano, ItalyDepartment of Engineering, University of Campania “Luigi Vanvitelli” Via Roma, 29 81031 Aversa, CE, ItalyDepartment of Engineering, University of Campania “Luigi Vanvitelli” Via Roma, 29 81031 Aversa, CE, ItalyDepartment of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, 7034 Trondheim, NorwayThis 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.http://www.sciencedirect.com/science/article/pii/S2666359721000093Residual stressesWelded jointMaterial propertiesFinite element methodStructural steel |
| spellingShingle | 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 Forces in Mechanics Residual stresses Welded joint Material properties Finite element method Structural steel |
| title | 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_short | 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 |
| topic | Residual stresses Welded joint Material properties Finite element method Structural steel |
| url | http://www.sciencedirect.com/science/article/pii/S2666359721000093 |
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