Effects of vibration frequency and amplitude on friction reduction and wear characteristics of silicon

Yoo, Sung-Shik; Kim, Dae Eun

doi:10.1016/j.triboint.2015.08.025

Cited by 23 publications

(9 citation statements)

References 37 publications

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“…On the one hand, it provides the possibility for magnetic field to control friction and reduce wear; on the other hand, because of the influence of the magnetic field, its friction mechanism becomes more complex. Factors such as hardness, elastic modulus, surface topography, chemistry, vibration, and temperature all contribute to the complex contact conditions, leading to a change in the tribological characteristics [12][13][14][15]. To explore the magnetically controlled friction characteristics of the MRE under the action of a magnetic field, Lee et al [11] independently designed and built a sliding friction test platform.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on surface roughness of magnetorheological elastomer for controllable friction

et al. 2019

Friction

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Magnetorheological elastomer (MRE) is a type of smart material of which mechanical and electrical properties can be reversibly controlled by the magnetic field. In this study, the influence of the magnetic field on the surface roughness of MRE was studied by the microscopic modeling method, and the influence of controllable characteristics of the MRE surface on its friction properties was analyzed by the macroscopic experimental method. First, on the basis of existing studies, an improved mesoscopic model based on magnetomechanical coupling analysis was proposed. The initial surface morphology of MRE was characterized by the W-M fractal function, and the change process of the surface microstructures of MRE, induced by the magnetic interaction between particles, was studied. Then, after analyzing the simulation results, it is found that with the increase in the magnetic field and decrease in the modulus of rubber matrix, the surface of MRE changes more significantly, and the best particle volume fraction is within 7.5%-9%. Furthermore, through experimental observation, it is found that the height of the convex peak on the surface of MRE decreases significantly with the action of the magnetic field, resulting in a reduction in the surface roughness. Consistent with the simulation results, a particle volume fraction of 10% corresponds to a maximum change of 14%. Finally, the macroscopic friction experiment results show that the friction coefficients of MREs with different particle volume fractions all decrease with the decrease in surface roughness under the magnetic field. When the particle volume fraction is 10%, the friction coefficient can decrease by 24.7% under a magnetic field of 400 mT, which is consistent with the trend of surface roughness changes. This shows that the change in surface morphology with the effect of the magnetic field is an important factor in the control of MRE friction properties by magnetic field.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on surface roughness of magnetorheological elastomer for controllable friction

et al. 2019

Friction

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“…4 The normal operation of vehicles is strongly dependent on the current collection quality of the pantograph given its key role as functional equipment of metro vehicles. [5][6][7][8] Currently, the carbon strip of the pantograph must have sufficient mechanical strength and wear resistance. The experimental results of Csapo 9 and Senouci 10 show that the whole wear of the carbon strip of the metro pantograph is consistent.…”

Section: Introductionmentioning

confidence: 99%

“…4 The normal operation of vehicles is strongly dependent on the current collection quality of the pantograph given its key role as functional equipment of metro vehicles. 5–8…”

Section: Introductionmentioning

confidence: 99%

Experimental research on the non-uniform wear of the carbon strip of the metro pantograph

Luo,

Cai,

Yang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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The present study simulated the actual contact conditions between the catenary and pantograph of a metro line using high-speed ring block current that carried friction and wear testers, from which the uneven wear of the pantograph carbon strip under different working conditions was studied. The results show that the arc power, friction coefficient, and wear amount will change correspondingly with increasing current and normal load. Additionally, all carbon strips showed non-uniform wear after the test, and the edge erosion and wear depth of the carbon strip perpendicular to the moving direction were higher than those in the middle part. The ablation of the back end of the carbon strip running with the catenary was higher than that of the front end.

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“…External vibrations usually change electrical contact and degrade electrical contact performance [ 14 ]. When the amount of electrical contact reduces due to the momentary separation of electrical contact under vibration conditions [ 15 ], contact resistance increases and current sharply decreases [ 16 ]. When the separation gap is extremely large, arc erosion occurs and reduces the electrical contact stability [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Electrical Contact Performance of Cu Alloy under Vibration Condition and Acetal Glue Environment

Cao

et al. 2022

Materials

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In view of the serious sliding electrical contact performance caused by external vibration and environmental contaminant, a study on the tribological characteristic and contact resistance of Cu alloy was conducted using a self-developed micro-load reciprocating electric contact device. Various glue concentrations (0%, 10%, 30%, and 50%) were prepared with anhydrous ethanol and deposited on the surface of a pure copper block via the deposition method. An external vibration source was installed on the sliding module to achieve vertical vibration. The results indicate that the final contact resistance and coefficient of friction (COF) in direct metal contact are about 0.01 Ω and 0.3, respectively. At this time, the wear volume is 2 to 3 orders of magnitude higher than the condition with glue residual. As glue concentration is above 10%, residual glue on the surface of Cu alloy hinders efficient contact between friction pairs, resulting in higher contact resistance. Glue exhibits lubrication, anti-wear, and insulation properties. External vibration causes friction pairs to briefly separate, leading to a lower glue removal capacity than that under non-vibration conditions. The contact resistance with glue addition under vibration conditions is higher than that under non-vibration conditions at 3 × 104 cycles. The dominant oxide product is CuO, which has a limited effect on contact resistance.

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Effects of vibration frequency and amplitude on friction reduction and wear characteristics of silicon

Cited by 23 publications

References 37 publications

Experimental and numerical study on surface roughness of magnetorheological elastomer for controllable friction

Experimental and numerical study on surface roughness of magnetorheological elastomer for controllable friction

Experimental research on the non-uniform wear of the carbon strip of the metro pantograph

Electrical Contact Performance of Cu Alloy under Vibration Condition and Acetal Glue Environment

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