TEMPERATURE DEPENDENT EFFECTIVE FRICTION COEFFICIENT ESTIMATION IN FRICTION STIR WELDING WITH THE BOBBIN TOOL

Main Article Content

Miroslav M. MIJAJLOVIĆ Sonja M. VIDOJKOVIĆ Miloš S. MILOŠEVIĆ

Abstract

The friction coefficient in many friction stir welding researches is generally used as an effective, constant value without concern on the adaptable and changeable nature of the friction during welding sequence. This is understandable because the main problem in analyzing friction in friction stir welding are complex nature of the friction processes, case-dependent and time dependent contact between the bodies, influence of the temperature, sliding velocity, etc. This paper is presenting a complex experimental-numerical-analytical model for estimating the effective friction coefficient on contact of the bobbin tool and welding plates during welding, considering the temperature at the contact as the most influencing parameter on friction. The estimation criterion is the correspondence of the experimental temperature and temperature from the numerical model. The estimation procedure is iterative and parametric – the heat transport parameters and friction coefficient are adapted during the estimation procedure in a realistic manner to achieve relative difference between experimental and model’s temperature lower than 3%. The results show that friction coefficient varies from 0.01 to 0.21 for steel-aluminium alloy contact and temperature range from 406 °C to 22 °C.

Article Details

How to Cite
MIJAJLOVIĆ, Miroslav M.; VIDOJKOVIĆ, Sonja M.; MILOŠEVIĆ, Miloš S.. TEMPERATURE DEPENDENT EFFECTIVE FRICTION COEFFICIENT ESTIMATION IN FRICTION STIR WELDING WITH THE BOBBIN TOOL. Thermal Science, [S.l.], v. 20, p. S1321-S1332, feb. 2017. ISSN 2334-7163. Available at: <http://thermal-science.tech/journal/index.php/thsci/article/view/1652>. Date accessed: 14 dec. 2017. doi: https://doi.org/10.2298/TSCI16S5321M.
Section
Articles
Received 2017-02-07
Accepted 2017-02-07
Published 2017-02-07

References

[1] Soundararajan, V., et al., An Overview of R&D Work in Friction Stir Welding at SMU, MJoM, Metalurgija, Association of Metallurgical Engineers of Serbia, Journal of Metallurgy, 204 (2006), 12, pp. 277-295
[2] Kalle, S., Application of Friction Stir Welding in the Shipbuilding Industry, Proceedings, Lightweight Construction – Latest Development, London, 2000
[3] Kumar, K., et al., An Investigation of Friction during Friction Stir Welding of Metallic Materials, Materials and Manufacturing Processes, 24 (2009), 4, pp. 438-44
[4] Mijajlović, M., Investigation and Development of Analytical Model for Estimation of Amount of Heat Generated During FSW, Ph. D., University of Nis, Nis, Serbia, 2012
[5] Miltenović, A., et al., Determination of Friction Heat Generation in Wheel-Rail Contact Using FEM, Facta Universitatis: Mechanical Engineering, 13 (2015), 2, pp. 99-108
[6] Zettler, R., et al., A Study of Material Flow in FSW of AA2024-T351 and AA 6056-T4 Alloys, Proceedings, the 5th International Conference on Friction Stir Welding, Metz, France, 2004
[7] Schmidt, H., et al., An Analytical Model for the Heat Generation in Friction Stir Welding, Modelling and Simulation in Materials Science and Engineering, 12 (2004), 1, pp. 143-157
[8] Veljić, D., et al., Heat Generation during Plunge Stage in Friction Stir Welding, Thermal Science, 17 (2013), 2, pp. 489-496
[9] Heurtier, P., et al., Mechanical and Thermal Modelling of Friction Stir Welding, Journal of Materials Processing Technology, 171 (2006), pp. 348-357
[10] Mijajlović, M. et al., Study About Friction Coefficient Estimation in Friction Stir Welding, Balkantrib 11, Proceedings, 7th International Conference on Tribology, Thessaloniki, Greece, 2011, pp. 323-330