An improved friction model and its implications for the slip, the frictional energy, and the cornering force and moment of tires |
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Authors: | K -S Park C -W Oh T -W Kim Hyun-Yong Jeong Y -H Kim |
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Affiliation: | 1. Department of Mechanical Engineering, Sogang University, 1 Shinsoo-Dong, Mapo-Gu, 121-742, Seoul, Korea 2. Hankook Tire R & D Center, 23-1 Jang-Dong, Yuseong-Gu, 305-343, Daejun, Korea
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Abstract: | An improved friction model was proposed with consideration of the effect of the sliding speed, the contact pressure and the
temperature, and it was implemented into a user subroutine of a commercial FEM code, ABAQUS/Explicit. Then, a smooth tire
was simulated for free rolling, driving, braking and cornering situations using the improved friction model and the Coulomb
friction model, and the effect of the friction models on the slip, the frictional energy distribution and the cornering force
and moment was analyzed. For the free rolling, the driving and the braking situations, the improved friction model and the
Coulomb friction model resulted in similar profiles of the slip and the frictional energy distributions although the magnitudes
were different. The slips obtained from the simulations were in a good correlation with experimental data. For the cornering
situation, the Coulomb friction model with the coefficient of friction of 1 or 2 resulted in lower or higher cornering forces
and moments than experimental data. In addition, in contrast to experimental data it did not result in a maximum cornering
force and a decrease of the cornering moment for the increase of the speed. However, the improved friction model resulted
in similar cornering forces and moments to experimental data, and it resulted in a maximum cornering force and a decrease
of the cornering moment for the increase of the speed, showing a good correlation with experimental data. |
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