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Research Papers: Contact Mechanics

Squeal Noise of Friction Material With Groove-Textured Surface: An Experimental and Numerical Analysis

[+] Author and Article Information
X. C. Wang

Tribology Research Institute,
Southwest Jiaotong University,
Chengdu 610031, China
e-mail: xcwang885127@sina.com

J. L. Mo

Tribology Research Institute,
Southwest Jiaotong University,
Chengdu 610031, China
e-mail: jlmo@swjtu.cn

H. Ouyang

School of Engineering,
University of Liverpool,
Liverpool L69 3GH, UK
e-mail: H.Ouyang@liverpool.ac.uk

D. W. Wang

Tribology Research Institute,
Southwest Jiaotong University,
Chengdu 610031, China
e-mail: dongwei1013@sina.cn

G. X. Chen

Tribology Research Institute,
Southwest Jiaotong University,
Chengdu 610031, China
e-mail: chen_guangx@163.com

M. H. Zhu

Tribology Research Institute,
Southwest Jiaotong University,
Chengdu 610031, China
e-mail: zhuminhao@swjtu.cn

Z. R. Zhou

Tribology Research Institute,
Southwest Jiaotong University,
Chengdu 610031, China
e-mail: zrzhou@swjtu.cn

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received March 31, 2015; final manuscript received June 30, 2015; published online October 9, 2015. Assoc. Editor: James R. Barber.

J. Tribol 138(2), 021401 (Oct 09, 2015) (11 pages) Paper No: TRIB-15-1098; doi: 10.1115/1.4031399 History: Received March 31, 2015; Revised June 30, 2015

In this work, an experimental and numerical study is performed to understand squeal generation and suppression of a pad-on-disk friction system. Several friction material specimens having various orientation degrees of grooves cut on their surfaces are tested. Numerical studies using the methods of complex eigenvalue analysis and dynamic transient analysis are conducted to simulate the experimental process with the finite element (FE) software abaqus. Both experimental and numerical results show that surface modifications of friction material specimens have a significant influence on the squeal instability: cutting a 45 deg or 90 deg groove on the material surface can significantly reduce squeal noise, cutting a 135 deg groove just reduces squeal noise moderately and cutting a 0 deg groove cannot reduce squeal noise. Moreover, the contact pressure distributions for the original surface and modified surfaces are studied to provide a physical explanation of the noise phenomenon. The major finding that friction-induced noise can be reduced by means of suitable structural modifications of the contact interface is expected to have important and much wider applications.

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References

Figures

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Fig. 1

Schematic view of the experimental setup

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Fig. 2

The definition of the groove orientation on pad surface

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Fig. 3

Optical images of the modified pad surfaces

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Fig. 4

FE model of the experimental system: (a) FE mesh and (b) load and boundary conditions

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Fig. 5

Five kinds of the pad surfaces

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Fig. 6

Equivalent sound pressure level for the five surfaces

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Fig. 7

PSD of sound pressure during the whole test

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Fig. 8

Tangential vibration acceleration in the steady stage for the five pad surfaces under testing

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Fig. 9

Positive real parts of complex eigenvalues and unstable mode of five friction systems versus the friction coefficient (μ)

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Fig. 10

Time history of the normal load and the rotational speed of the disk in the dynamic transient analysis

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Fig. 11

Simulation results of vibration acceleration for smooth surface and 0 deg groove-textured surface friction systems in the tangential direction in time domain

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Fig. 12

Predicted unstable frequencies in the periods of 0–2 s (a) and 0–0.1 s (b) for smooth surface and 0 deg groove-textured surface friction systems

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Fig. 13

Simulation results of vibration acceleration for the five different friction systems in tangential direction in time domain

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Fig. 14

Velocity against displacement for the smooth and 90 deg groove-textured surface

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Fig. 15

Contact pressure distribution for the smooth surface, 0 deg, 45 deg, 90 deg and 135 deg groove-textured surfaces at speeds of 0 rad/s and 6.28 rad/s

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