This paper describes tools for numerical modeling which enable the understanding of the appearance of vibrations of a structure generated by the frictional contact between two bodies (the excitation source being friction). The dynamic finite element code PLASTD is used to reproduce transitory phenomena generated at the contact interface. This code includes contact and friction algorithms based upon a formulation which uses Lagrange multipliers. A numerical study of the dynamic response of a 2D mechanical model composed of a deformable body in relative translation and unilateral contact with Coulomb friction with a rigid surface is presented. The steady sliding solution is generically unstable and leads to a dynamic response which leads to the generation of instabilities characterized by the appearance of steady-state pulses. It is important to notice that those instabilities appear even with a constant friction coefficient of Coulomb. These simulations provided the local contact conditions (kinematics, tribological state, contact stresses, etc). The kinematics shows the existence of local impacts and sliding at high frequencies. Furthermore, local contact normal stress is found to be much higher than that expected for a smooth surface. Finally, a 3D simulation of brakes is carried out, focusing on the vibrations of the disk and the brake pad which produce noise and are due to the interface instabilities.
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July 2005
Research Papers
Finite Element Simulation of Dynamic Instabilities in Frictional Sliding Contact
L. Baillet,
L. Baillet
Contact and Solid Mechanics Laboratory (LaMCoS), INSA Lyon, 69621 Villeurbanne Cedex France
11
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V. Linck,
V. Linck
Contact and Solid Mechanics Laboratory (LaMCoS), INSA Lyon, 69621 Villeurbanne Cedex France
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S. D’Errico,
S. D’Errico
Contact and Solid Mechanics Laboratory (LaMCoS), INSA Lyon, 69621 Villeurbanne Cedex France
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B. Laulagnet,
B. Laulagnet
Vibration—Acoustics Laboratory (LVA), INSA Lyon, 69621 Villeurbanne Cedex France
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Y. Berthier
Y. Berthier
Contact and Solid Mechanics Laboratory (LaMCoS), INSA Lyon, 69621 Villeurbanne Cedex France
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L. Baillet
11
Contact and Solid Mechanics Laboratory (LaMCoS), INSA Lyon, 69621 Villeurbanne Cedex France
V. Linck
Contact and Solid Mechanics Laboratory (LaMCoS), INSA Lyon, 69621 Villeurbanne Cedex France
S. D’Errico
Contact and Solid Mechanics Laboratory (LaMCoS), INSA Lyon, 69621 Villeurbanne Cedex France
B. Laulagnet
Vibration—Acoustics Laboratory (LVA), INSA Lyon, 69621 Villeurbanne Cedex France
Y. Berthier
Contact and Solid Mechanics Laboratory (LaMCoS), INSA Lyon, 69621 Villeurbanne Cedex France
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division November 21, 2003; revised manuscript received November 25, 2004. Review conducted by: R. W. Snidle.
J. Tribol. Jul 2005, 127(3): 652-657 (6 pages)
Published Online: June 13, 2005
Article history
Received:
November 21, 2003
Revised:
November 25, 2004
Online:
June 13, 2005
Citation
Baillet, L., Linck , V., D’Errico, S., Laulagnet, B., and Berthier, Y. (June 13, 2005). "Finite Element Simulation of Dynamic Instabilities in Frictional Sliding Contact ." ASME. J. Tribol. July 2005; 127(3): 652–657. https://doi.org/10.1115/1.1866160
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