On the dependency of rubber friction on the normal force or load: theory and experiment

Fortunato, G.; Ciaravola, V.; Furno, A.; Scaraggi, Michele; Lorenz, B.; Persson, B. N. J.

doi:10.48550/arxiv.1512.01359

2015

DOI: 10.48550/arxiv.1512.01359

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On the dependency of rubber friction on the normal force or load: theory and experiment

G. Fortunato¹,

V. Ciaravola²,

A. Furno³

et al.

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Cited by 2 publications

(3 citation statements)

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“…In this letter we present a very simple model for the elastic (or viscoelastic) coupling between the macroasperity contact regions, and we show that the lateral coupling between the contact regions influences the stick-slip dynamics of the contact regions. This results in a dependency of the friction coefficient on the load, similarly to what we have observed in rubber friction experiments [14,15].…”

supporting

confidence: 84%

“…Qualitative discussion. -A tentative explanation for the observations above is as follows [14]. For velocities v v max the rubber in (almost) all macroasperity contact regions slip relative to the substrate with the same velocity v as the upper surface of the rubber block.…”

mentioning

confidence: 91%

“…In ref. [14] it was suggested that the lateral coupling between the macroasperity contact regions may result in a dependency of the friction coefficient on the load.…”

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confidence: 99%

See 2 more Smart Citations

On the dependency of friction on load: Theory and experiment

Braun

Steenwyk

Warhadpande

et al. 2016

EPL

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In rubber friction studies it is often observed that the kinetic friction coefficient depends on the nominal contact pressure. This is usually due to frictional heating, which softens the rubber, increases the area of contact, and (in most cases) reduces the viscoelastic contribution to the friction. In this paper we present experimental results showing that the rubber friction also depends on the nominal contact pressure at such low sliding speed that frictional heating is negligible. This effect has important implications for rubber sliding dynamics, e.g., in the context of the tire-road grip. We attribute this effect to the viscoelastic coupling between the macroasperity contact regions, and present a simple earthquakelike model and numerical simulations supporting this picture. The mechanism for the dependency of the friction coefficient on the load considered is very general, and is relevant for non-rubber materials as well.

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supporting

confidence: 84%

mentioning

confidence: 91%

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On the dependency of friction on load: Theory and experiment

Braun

Steenwyk

Warhadpande

et al. 2016

EPL

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Comparison of Analytical Model for Contact Mechanics Parameters with Numerical Analysis and Experimental Results

Vadakkeveetil¹,

Nouri²,

Taheri³

2019

Tire Science and Technology

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Being able to estimate tire/rubber friction is very important to tire engineers, materials developers, and pavement engineers. This is because of the need for estimating forces generated at the contact, optimizing tire and vehicle performance, and estimating tire wear. Efficient models for contact area and interfacial separation are key for accurate prediction of friction coefficient. Based on the contact mechanics and surface roughness, various models were developed that can predict real area of contact and penetration depth/interfacial separation. In the present work, we intend to compare the analytical contact mechanics models using experimental results and numerical analysis. Nano-indentation experiments are performed on the rubber compound to obtain penetration depth data. A finite element model of a rubber block in contact with a rough surface was developed and validated using the nano-indentation experimental data. Results for different operating conditions obtained from the developed finite element model are compared with analytical model results, and further model improvements are discussed.

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On the dependency of rubber friction on the normal force or load: theory and experiment

Cited by 2 publications

References 4 publications

On the dependency of friction on load: Theory and experiment

On the dependency of friction on load: Theory and experiment

Comparison of Analytical Model for Contact Mechanics Parameters with Numerical Analysis and Experimental Results

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