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Research Papers: Friction and Wear

Frictional Study of the Soft and Hard Solid Interface Using Response Surface Methodology

[+] Author and Article Information
Avinash A. Thakre

Department of Mechanical Engineering,
Visvesvaraya National Institute of Technology,
Nagpur 440010, Maharashtra, India
e-mail: avinashathakre@gmail.com

Arun K. Singh

Department of Mechanical Engineering,
Visvesvaraya National Institute of Technology,
Nagpur 440010, Maharashtra, India

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received June 27, 2017; final manuscript received December 27, 2017; published online February 9, 2018. Assoc. Editor: Zhong Min Jin.

J. Tribol 140(4), 041601 (Feb 09, 2018) (7 pages) Paper No: TRIB-17-1257; doi: 10.1115/1.4039029 History: Received June 27, 2017; Revised December 27, 2017

The present study includes the investigation on the frictional dynamics of hard and soft solid interface using low velocity linear tribometer. The effects of gelatin concentration, nanoparticles concentration, normal stress, and sliding velocity on the static and dynamic frictional shear stresses acting on the sliding gel block are studied using response surface methodology (RSM). The shear sliding experiments are conducted in steady sliding regime, well above the critical velocity. L31 orthogonal array consisting of five levels for each factor is selected for the experimentation and second-order quadratic model has been generated for both the responses. The mathematic models are validated with the available trends mentioned in the literature.

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References

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Figures

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Fig. 1

Scanning electron microscope photograph of Al2O3 nanoparticles

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Fig. 2

Low velocity linear tribometer used to perform the sliding experiments

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Fig. 3

Variation of interfacial shear stress with respect to the slide time for (a) 10% gelatin concentration, 0% nanoparticles concentration for normal stress of 1.428 kPa, and sliding velocity of 1.2 mm/s and (b) 8% gelatin concentration, 1.5% nanoparticles concentration for normal stress of 0.952 kPa, and sliding velocity of 0.9 mm/s

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Fig. 4

Main effect plots for (a) static and (b) dynamic shear stresses, respectively

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Fig. 5

(a) Schematic diagram of wedge facture experiments and (b) image of interfacial crack

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Fig. 6

Effect of the gelatin concentration on the (a) static and (b) dynamic shear stresses, respectively, for 1% nanoparticles concentration at sliding velocity of 1.2 mm/s

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Fig. 7

Effect of the nanoparticles concentration on the (a) static and (b) dynamic shear stresses, respectively, at normal stress of 1.904 kPa

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Fig. 8

Effect of normal stresses on (a) static and (b) dynamic shear stresses, respectively, for different gelatin concentrations at sliding velocity of 1.2 mm/s

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Fig. 9

Effect of sliding velocity on (a) static and (b) dynamic shear stresses, respectively, for different gelatin concentration

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