Volume 14, Issue 16 (Forth Special Issue 2015)
Modares Mechanical Engineering 2015, 14(16): 302-310 |
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Salimi M, shahgholian D. Modeling of sliding friction with superimposed ultrasonic oscillation . Modares Mechanical Engineering 2015; 14 (16) :302-310
URL: http://mme.modares.ac.ir/article-15-10847-en.html
URL: http://mme.modares.ac.ir/article-15-10847-en.html
Abstract: (7166 Views)
When two bodies slide on each other the asperities are engaged and deformed which causes the dynamic friction. By superposing ultrasonic oscillation to one of the bodies, the friction force is reduced . The experiments show that the friction force may be reduced by about 60 percent depending on material properties and the kinetics of the two bodies. This phenomenon is widely used in metal forming and metal cutting. This phenomenon may be used as a replacement of lubricants in such processes due to its higher efficiency and less pollution effects . In this research an elastic-plastic model for the surface contact is given which is capable of predicting the friction force when ultrasonic vibrations are superimposed to macroscopic motion . The result of this model is compared with that of the experimental values. The differences between these values are shown to be less than 10 percent . The result of the model is also compared with that of the Dong model. The comparison show that the present model has better accuracy of the Dong model .
Keywords: Modelling, Sliding Friction, Ultrasonic Oscillation, Asperity, Surface Contact.
Article Type: Research Article |
Subject:
Vibration|Sonic Flow|Analytical Methods|Metal Forming
Received: 2014/04/30 | Accepted: 2014/07/4 | Published: 2014/11/15
Received: 2014/04/30 | Accepted: 2014/07/4 | Published: 2014/11/15
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