Accession Number:

AD0743117

Title:

Thermoelastic Instabilities in Sliding Contact.

Descriptive Note:

Final rept. 15 Apr 71-15 Apr 72,

Corporate Author:

NORTHWESTERN UNIV EVANSTON ILL DEPT OF MECHANICAL ENGINEERING AND ASTRONAUTICAL SCIENCES

Personal Author(s):

Report Date:

1972-05-18

Pagination or Media Count:

96.0

Abstract:

Thermoelastic instability in rubbing contact is shown to be a consequence of the interaction of frictional heating, thermal expansion, conduction of heat from the contact zone, and wear. It manifests itself as a departure of the pressure distribution from a nominally uniform magnitude, as a result of the amplification of small disturbances. Such an instability is investigated here for two models of surface contact a one-dimensional pin model and b two-dimensional blade model. The effects of materials, friction coefficients, severity of wear and sliding speed are delineated with respect to disturbance amplification or damping. The long-term growth of a disturbance is described and the resulting hot spot motion is explained. Author

Subject Categories:

  • Adhesives, Seals and Binders
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE