Friction between a temperature dependent viscoelastic body and a rough surface

Heise, Rainer

doi:10.1007/s40544-016-0103-0

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…The analysis of the variation in the friction coefficient for the friction pair of cranes in relation to temperature, roughness, and contact pressure was studied by a number of authors [ 1 , 5 , 9 , 14 , 20 ]. However, they did not include overhead cranes, or more specifically, a study aimed at the simultaneous analysis of the parameters: relative speed; contact pressure and temperature on the coefficient of friction; and the weight of influence of these factors on the coefficient of friction were never looked into in these studies.…”

Section: Theoretical Considerations Regarding the Wear Of The Brake L...mentioning

confidence: 99%

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Tribological Aspects Concerning the Study of Overhead Crane Brakes

et al. 2022

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The aim of the study is the tribological analysis of the crane drum brakes. A theoretical analysis of the wear processes for brake lining was performed and the coefficient of friction under tribological conditions was determined experimentally simulating the operating conditions for three types of brakes. The theoretical study of the wear was oriented towards of determining the lifetime of the brake lining. In the experimental determination of the coefficient of friction, the following parameters were taken into account: the contact pressure between the shoe and the drum; the initial speed of the brake drum; the humidity of the working environment; and the temperature of the drum-brake lining friction surfaces. After performing the experiments, a statistical analysis was conducted, that shows the amount the coefficient of friction is influenced by the previously mentioned parameters: the highest weight was humidity with a value of 35.58%, followed by temperature with a percentage of 23.95%, velocity with 4.54%, and lastly pressure with 4.19%. Furthermore, the equation that expresses the dependence between the coefficient of friction and the parameters is determined. We consider that the results obtained are important for brake manufacturers in order to improve braking efficiency and the safety of overhead cranes.

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Section: Theoretical Considerations Regarding the Wear Of The Brake L...mentioning

confidence: 99%

“…Deformations are due to: deformation of the roughness of the materials, loss of energy due to hysteresis and grooving [ 7 ]. The hysteresis depends on contact pressure, strain rate and temperature and the viscoelastic effects determine the dependence between the coefficient of friction and the temperature [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Tribological Aspects Concerning the Study of Overhead Crane Brakes

et al. 2022

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“…In such machine systems, temperatures T higher than 1,000 °C can develop between the components. In these scenarios, traditional oil-based lubricant is not appropriate for use, because of its disadvantages such as unfavorable viscosity-temperature μ-T characteristics and flammability [3,4]. Thus, new lubricants suitable for such applications should be found and studied.…”

Section: Introductionmentioning

confidence: 99%

Thermocapillary migration mechanism of molten silicon droplets on horizontal solid surfaces

et al. 2017

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Abstract:Effective lubrication under extreme conditions such as high temperature is of considerable importance to ensure the reliability of a mechanical system. New lubricants that can endure high temperatures should be studied and employed as alternatives to traditional oil-based lubricant. In this paper, a thermocapillary model of a silicone-oil droplet is developed by solving the Navier-Stokes and energy equations to obtain the flow, pressure, and temperature fields. This is accomplished using a conservative microfluidic two-phase flow level set method designed to track the interface between two immiscible fluids. The numerical simulation accuracy is examined by comparing the numerical results with experimental results obtained for a silicone-oil droplet. Hence, the movement and deformation of molten silicon droplets on graphite and corundum are numerically simulated. The results show that a temperature gradient causes a tension gradient on the droplet surface, which in turn creates a thermocapillary vortex. As the vortex develops, the droplet migrates to the low-temperature zone. In the initial stage, the molten silicon droplet on the corundum substrate forms two opposite vortex cells, whereas two pairs of opposite vortices are formed in the silicone fluid on the graphite substrate. Multiple vortex cells gradually develop into a single vortex cell, and the migration velocity tends to be stable. The greater the basal temperature gradient, the stronger the internal thermocapillary convection of the molten silicon droplet has, which yields higher speeds.

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Effect of stick-slip on magneto-rheological elastomer with a magnetic field

Lian

Lee

et al. 2017

Friction

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This study investigated the stick-slip characteristics of a magneto-rheological elastomer (MRE) against an aluminum plate. Herein, the MRE was manufactured, and a stick-slip tester was employed to evaluate the stick-slip performance of the MRE under different velocities and load conditions with and without a magnetic field. The fast Fourier transform (FFT) of the friction force of the stick-slip and the roughness of the aluminum plate surface were calculated to confirm the stick-slip phenomenon. After the tests, the wear surfaces were observed to evaluate the wear properties of the MRE regarding the stick-slip. Results showed that the stick-slip was smaller at lower velocity. At higher velocity, the reduction of the stick-slip under a magnetic field was more clearly observed. Moreover, the wear reduced with reduced stick-slip under a magnetic field.

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Friction between a temperature dependent viscoelastic body and a rough surface

Cited by 5 publications

References 28 publications

Tribological Aspects Concerning the Study of Overhead Crane Brakes

Tribological Aspects Concerning the Study of Overhead Crane Brakes

Thermocapillary migration mechanism of molten silicon droplets on horizontal solid surfaces

Effect of stick-slip on magneto-rheological elastomer with a magnetic field

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