Technical Briefs

A Study on the Tribological Characteristics of a Magneto-Rheological Elastomer

[+] Author and Article Information
Chul-Hee Lee

Department of Mechanical Engineering
Inha University
253 Yonghyeon-dong
Nam-gu, Incheon 402-751, South Korea
e-mail: chulhee@inha.ac.kr.

Won-Oh Cho

Research and Development Center
Chang Am LS Company
ChoongChungNam-Do 336-857, South Korea

1Corresponding author

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received January 20, 2012; final manuscript received July 16, 2012; published online December 20, 2012. Assoc. Editor: George K. Nikas.

J. Tribol 135(1), 014501 (Dec 20, 2012) (5 pages) Paper No: TRIB-12-1014; doi: 10.1115/1.4023080 History: Received January 20, 2012; Revised July 16, 2012

Research on the applications of magneto-rheological (MR) elastomers in mechanical engineering has greatly expanded, whereas the performance of MR fluids in tribology has rarely been investigated. In this study, the tribological characteristics of an MR elastomer are identified in order to improve tribological performance with the activation of a magnetic field. Microscopic changes in the surface and in the MR particles are investigated. The friction and wear of an MR elastomer is measured using a pin-on-disc tester under applied and unapplied magnetic fields. In addition, the linear sliding friction of an MR elastomer with respect to different velocities and loads is measured using a linear sliding tester.

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Fig. 1

The MR elastomer specimens (59.5 mm in diameter and 6 and 15 mm in height)

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Fig. 2

Pin-on-disc tester

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Fig. 3

Linear sliding tester

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Fig. 4

Microscopic images on the surface of the MR elastomer: (a) no magnetic field, and (b) applied magnetic field

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Fig. 5

Results of the average friction coefficients based on the pin-on-disc test results

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Fig. 6

Images on the surface of the MR elastomer after the pin-on-disc tests: (a) no magnetic field, and (b) applied magnetic field

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Fig. 7

Results of the linear sliding test: (a) velocity = 1 mm/s, (b) velocity = 10 mm/s, and (c) velocity = 37.5 mm/s

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Fig. 8

Comparison of the results between linear sliding friction and acceleration (load of 2 N and velocity of 1 mm/s; Test 7)

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Fig. 9

Average friction coefficient results from the linear sliding test



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