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Nelineinaya Dinamika [Russian Journal of Nonlinear Dynamics], 2011, Volume 7, Number 2, Pages 339–365
(Mi nd262)
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This article is cited in 2 scientific papers (total in 2 papers)
Experimental Dynamics
On the terminal motion of sliding spinning disks with uniform Coulomb friction
P. D. Weidmana, Ch. P. Malhotrab a Department of Mechanical Engineering, University of Colorado
b Tata Research Development and Design Centre
Abstract:
We review previous investigations concerning the terminal motion of disks sliding and spinning with uniform dry friction across a horizontal plane. Previous analyses show that a thin circular ring or uniform circular disk of radius $R$ always stops sliding and spinning at the same instant. Moreover, under arbitrary nonzero initial values of translational speed $v$ and angular rotation rate $\omega$, the terminal value of the speed ratio $\epsilon_0=v/R\omega$ is always 1.0 for the ring and 0.653 for the uniform disk. In the current study we show that an annular disk of radius ratio $\eta=R_2/R_1$ stops sliding and spinning at the same time, but with a terminal speed ratio dependent on $\eta$. For a twotier disk with lower tier of thickness $H_1$ and radius $R_1$ and upper tier of thickness $Р_2$ and radius $R_2$, the motion depends on both $\eta$ and the thickness ratio $\lambda=H_1/H_2$. While translation and rotation stop simultaneously, their terminal ratio $\epsilon_0$ either vanishes when $k>\sqrt{2/3}$, is a nonzero constant when $1/2<k<\sqrt{2/3}$, or diverges when $k<1/2$, where k is the normalized radius of gyration. These three regimes are in agreement with those found by Goyal et al. [S. Goyal, A. Ruina, J. Papadopoulos, Wear 143 (1991) 331] for generic axisymmetric bodies with varying radii of gyration using geometric methods. New experiments with PVC disks sliding on a nylon fabric stretched over a plexiglass plate only partially corroborate the three different types of terminal motions, suggesting more complexity in the description of friction.
Keywords:
rigid body dynamics, terminal motion, nonlinear behavior.
Citation:
P. D. Weidman, Ch. P. Malhotra, “On the terminal motion of sliding spinning disks with uniform Coulomb friction”, Nelin. Dinam., 7:2 (2011), 339–365
Linking options:
https://www.mathnet.ru/eng/nd262 https://www.mathnet.ru/eng/nd/v7/i2/p339
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Abstract page: | 376 | Full-text PDF : | 119 | References: | 73 | First page: | 1 |
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