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Effect of design factors on surface temperature and wear in disk brakesThe temperatures, friction, wear and contact conditions that occur in high energy disk brakes are studied. Surface and near surface temperatures were monitored at various locations in a caliper disk brake during drag type testing, with friction coefficient and wear rates also being determined. The recorded transient temperature distributions in the friction pads and infrared photographs of the rotor disk surface both showed that contact at the friction surface was not uniform, with contact areas constantly shifting due to nonuniform thermal expansion and wear. The effect of external cooling and of design modifications on friction, wear and temperatures was also investigated. It was found that significant decreases in surface temperature and in wear rate can be achieved without a reduction in friction either by slotting the contacting face of the brake pad or by modifying the design of the pad support to improve pad compliance. Both design changes result in more uniform contact conditions on the friction surface.
Document ID
19760018474
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Santini, J. J. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Kennedy, F. E. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Ling, F. F. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Date Acquired
September 3, 2013
Publication Date
May 1, 1976
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-CR-134923
Accession Number
76N25562
Funding Number(s)
CONTRACT_GRANT: NGR-33-018-152
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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