The effect of frequency of vibration and humidity on the coefficient of friction

Chowdhury, Mohammad Asaduzzaman; Helali, Md. Maksud

doi:10.1016/j.triboint.2005.10.002

Cited by 67 publications

(53 citation statements)

References 12 publications

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“…Results also reveal that friction coefficient decreases with the increase in frequency of vibration. These findings are in agreement the findings for mild steel [7]. Friction coefficients of GFRP, mild steel and ebonite are compared for different conditions of vibration (frequency: 100 to 500 Hz and amplitude: 0 to 200 m) of similar hardness range [47].…”

Section: Friction Coefficient At Different Amplitudes and Frequenciessupporting

confidence: 82%

“…Several researchers [5][6][7] observed that the friction force and wear rate depend on roughness of the rubbing surfaces, relative motion, type of material, temperature, normal force, stick slip, relative humidity, lubrication and vibration. The parameters that dictate the tribological performance of polymer and its composites also include polymer molecular structure, processing and treatment, properties, viscoelastic behavior, surface texture etc.…”

Section: Introductionmentioning

confidence: 99%

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Friction and Wear of Polymer and Composites

Nuruzzaman¹,

Chowdhury²

2012

Composites and Their Properties

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Section: Friction Coefficient At Different Amplitudes and Frequenciessupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Friction and Wear of Polymer and Composites

Nuruzzaman¹,

Chowdhury²

2012

Composites and Their Properties

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“…This is because the surface roughness and other parameter attain a steady level at a shorter period of time with the increase in normal load. The trends of these results are similar to the results of Chowdhury and Helali [22,23]. Figure 3 shows the effect of the duration of rubbing on the value of friction coefficient at different normal load for aluminum-copper pair at speed of 1 m/s and 70% of relative humidity.…”

Section: Introductionsupporting

confidence: 76%

Effect of Load and Sliding Velocity on Friction Coefficient of Aluminum Sliding Against Different Pin Materials

Nuruzzaman¹,

Chowdhury²

2012

MATERIALS

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In the present research, friction coefficients of aluminum sliding against different pin materials are investigated and compared. In order to do so, a pin on disc apparatus is designed and fabricated. Experiments are carried out when different types of pin such as aluminum, copper and brass slide on aluminum disc. Experiments are conducted at normal load 5, 7.5 and 10 N, sliding velocity 0.5, 0.75 and 1 m/s and relative humidity 70%. Variations of friction coefficient with the duration of rubbing at different normal load and sliding velocity are investigated. Results show that friction coefficient varies with duration of rubbing, normal load and sliding velocity. In general, friction coefficient increases for a certain duration of rubbing and after that it remains constant for the rest of the experimental time. Moreover, the obtained results reveal that friction coefficient increases with the increase in normal load and sliding velocity for all the tested pairs. The magnitudes of friction coefficient are different for different material pairs depending on normal load and sliding velocity.

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“…Chowdhury and Helali [26] performed an experiment regarding this issue. A clear trend is observed, regarding the reduction of the friction coefficient with both the amplitude and the frequency of the normal vibration, for different tested materials.…”

Section: Dynamic Resultsmentioning

confidence: 99%

“…• Previous published results [24,25,26] has proven significant friction variations due to vibrations in normal and perpendicular direction of the contact points as well a significant dependency of sliding acceleration. These and related effects needs to be studied in more details.…”

Section: Conclusion and Future Aspectsmentioning

confidence: 86%

Numerical and experimental investigation of bump foil mechanical behaviour

Larsen

Varela

Santos

2014

Tribology International

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Corrugated foils are utilized in air foil bearings to introduce compliance and damping thus accurate mathematical predictions are important. A corrugated foil behaviour is investigated experimentally as well as theoretically. The experimental investigation is performed by compressing the foil, between two parallel surfaces, both statically and dynamically to obtain hysteresis curves. The theoretical analysis is based on a two dimensional quasi static FE model, including geometrical non-linearities and Coulomb friction in the contact points and neglects the foil mass. A method for implementing the friction is suggested. Hysteresis curves obtained via the FE model are compared to the experimental results obtained. Good agreement is observed in the low frequency range and discrepancies for higher frequencies are thoroughly discussed.

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The effect of frequency of vibration and humidity on the coefficient of friction

Cited by 67 publications

References 12 publications

Friction and Wear of Polymer and Composites

Friction and Wear of Polymer and Composites

Effect of Load and Sliding Velocity on Friction Coefficient of Aluminum Sliding Against Different Pin Materials

Numerical and experimental investigation of bump foil mechanical behaviour

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