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 th...e 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 degrees C to 22 degrees C.
Keywords:
friction stir welding / temperature / friction coefficient
TY - JOUR
AU - Mijajlovic, Miroslav M.
AU - Vidojković, Sonja
AU - Milošević, Miloš S.
PY - 2016
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1898
AB - 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 degrees C to 22 degrees C.
PB - VINCA Institute of Nuclear Sciences
T2 - Thermal Science
T1 - Temperature dependent effective friction coefficient estimation in friction stir welding with the bobbin tool
VL - 20
DO - 10.2298/TSCI16S5321M
ER -
@article{
author = "Mijajlovic, Miroslav M. and Vidojković, Sonja and Milošević, Miloš S.",
year = "2016",
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 degrees C to 22 degrees C.",
publisher = "VINCA Institute of Nuclear Sciences",
journal = "Thermal Science",
title = "Temperature dependent effective friction coefficient estimation in friction stir welding with the bobbin tool",
volume = "20",
doi = "10.2298/TSCI16S5321M"
}
Mijajlovic, M. M., Vidojković, S.,& Milošević, M. S.. (2016). Temperature dependent effective friction coefficient estimation in friction stir welding with the bobbin tool. in Thermal Science
VINCA Institute of Nuclear Sciences., 20.
https://doi.org/10.2298/TSCI16S5321M
Mijajlovic MM, Vidojković S, Milošević MS. Temperature dependent effective friction coefficient estimation in friction stir welding with the bobbin tool. in Thermal Science. 2016;20.
doi:10.2298/TSCI16S5321M .
Mijajlovic, Miroslav M., Vidojković, Sonja, Milošević, Miloš S., "Temperature dependent effective friction coefficient estimation in friction stir welding with the bobbin tool" in Thermal Science, 20 (2016),
https://doi.org/10.2298/TSCI16S5321M . .
