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Technical Brief

Effects of Viscoelastic Properties of Friction Lining Materials on Their Friction Coefficients

[+] Author and Article Information
Kai Chen, Xiaojia Zhang

School of Materials Science and Engineering,
China University of Mining and Technology,
Xuzhou 221116, China

Dekun Zhang

School of Materials Science and Engineering,
China University of Mining and Technology,
Xuzhou 221116, China
e-mail: dkzhang@cumt.edu.cn

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received March 29, 2016; final manuscript received June 18, 2016; published online November 30, 2016. Assoc. Editor: Sinan Muftu.

J. Tribol 139(3), 034502 (Nov 30, 2016) (7 pages) Paper No: TRIB-16-1100; doi: 10.1115/1.4034380 History: Received March 29, 2016; Revised June 18, 2016

In order to obtain the viscoelastic properties of friction linings and their effect on the tribological properties, three friction linings (K25, G30, and GM-3) are studied. Results show that higher creep and stress relaxation performances are favorable for promoting the friction coefficient. The friction coefficient of GM-3 is inversely proportional to the load. Meanwhile, the friction coefficients of K25 and G30 first increase to the peak under the load and later decrease. Under high load, GM-3 has the largest friction coefficient, whereas K25 has the smallest, with that of G30 being the median. The friction coefficient of GM-3 is inversely proportional to the loss factor, whereas those of K25 and G30 are directly proportional.

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Figures

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Fig. 1

XPS spectra of the three friction linings: (a) K25, (b) G30, and (c) GM-3

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Fig. 2

Creep performance curves for the three friction linings: (a) creep curve and (b) creep compliance

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Fig. 3

Stress relaxation performance curves for the three friction linings: (a) stress relaxation curves and (b) stress relaxation modulus

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Fig. 4

Dynamic viscoelastic properties under the strain scanning mode for the friction linings: (a) storage modulus, (b) loss modulus, and (c) loss factors

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Fig. 5

Microstructure of the three friction linings: (a) K25, (b) G30, and (c) GM-3

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Fig. 6

Hardness of the three friction linings

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Fig. 7

Friction coefficient curves for friction linings under different loads

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Fig. 8

Relation between static viscoelastic properties and friction coefficient

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Fig. 9

Relations between friction coefficient and loss factor

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