Photoelastic Study of Friction

[+] Author and Article Information
James W. Dally, Yung-Mien Chen

Department of Mechanical Engineering, University of Maryland, College Park MD 20742

Appl. Mech. Rev 44(11S), S60-S66 (Nov 01, 1991) doi:10.1115/1.3121374 History: Online April 30, 2009


A new method of measuring the normal and sliding loads associated with multiple point contact is introduced. A multiple point contact is modeled with a steel die with a profile that simulates a rough surface. A very large scale factor is used in modeling this surface. The steel die is placed in contact with a photoelastic model of a half plane and is subjected to a normal load. This normal load is partitioned over the multiple points of contact producing an isochromatic fringe pattern that describes the stress distribution in the local neighborhood of the contact points. A sliding load is then imposed on the model which destroys the symmetry of this fringe pattern. The fringe data in this pattern is sufficient to determine the local loads Pi and Qi and the local coefficient of friction fi = Qi / Pi at each contact point. An overdeterministic method is introduced which gives the solution for Pi, Qi and fi using many data points taken from the isochromatic pattern in the local neighborhood of the contacts.

Copyright © 1991 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In