Enhanced friction model for Friction Stir Welding (FSW) analysis: Simulation and experimental validation
| Autor: | Michele Chiumenti, Miguel Cervera, Antonio Segatori, Narges Dialami, W. Osikowicz |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. RMEE - Grup de Resistència de Materials i Estructures en l'Enginyeria |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Experimental validation
0209 industrial biotechnology Engineering Work (thermodynamics) Engineering Civil Friction stir welding Field (physics) Mechanical engineering Engineering Multidisciplinary Enginyeria civil::Materials i estructures [Àrees temàtiques de la UPC] 02 engineering and technology 020901 industrial engineering & automation Calibration Shear stress Torque General Materials Science Engineering Ocean Engineering Aerospace Engineering Biomedical Civil and Structural Engineering business.industry FSW Mechanical Engineering Weld line 021001 nanoscience & nanotechnology Condensed Matter Physics Computer Science Software Engineering Soldadura per fricció Engineering Marine Engineering Manufacturing Engineering Mechanical Mechanics of Materials Heat generation Engineering Industrial Friction model 0210 nano-technology business |
| Zdroj: | Scipedia Open Access Scipedia SL UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| Popis: | Friction is one of the main heat generation mechanisms in Friction Stir Welding (FSW). This phenomenon occurs between the pin and the workpiece as the rotating tool moves along the weld line. An accurate friction model is essential for obtaining realistic results in a FSW simulation in particular temperature, forces and torque. In this work, a modified Norton's friction law is developed. The suggested enhanced friction model aims at providing not only the realistic temperature field but also the forces and torque. This model does not exclusively relate the frictional shear stress to the sliding velocity; conversely it takes into account the effect of non-uniform pressure distribution under the shoulder, as this latter has an important role in the process of heat generation. Longitudinal, transversal and vertical forces and torque are numerically calculated. The effect of the enhanced friction model is reflected in these forces. In particular, it leads to a more realistic estimation of the transversal and longitudinal forces in comparison with the results obtained using former models. The friction model is successfully validated by the experimental measurements provided by the industrial partner (Sapa). The experimental analysis is performed for the material characterization, the calibration of the friction model and, more generally, the assessment of the overall numerical strategy proposed for the FSW simulation. |
| Databáze: | OpenAIRE |
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