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Thermomechanical phenomena in high speed rubbingAn analytical approach is presented for the modeling of the thermomechanical interactions which occur in high speed sliding situations. These sliding contact problems which are characterized by active and interrelated thermal and mechanical phenomena could be called 'rub energetics' problems. Analytical models were developed to simulate two different rub situations: high energy braking of disk brakes and high speed rubs of gas path seals in turbine engines. The models proved to be particularly useful in predicting the severe temperatures and deformations near hot contact patches on the rubbing surfaces. The size of the hot patches is generally determined by normal load and the properties of the contacting materials. Temperatures at the contact patches can approach the melting point of the materials, especially at high sliding velocities. These high temperatures can lead to large amounts of near-surface deformation and high wear rates. Decreased contact temperatures can result from using materials with increased thermal conductivity and increased heat capacity or choosing mechanical properties (decreased stiffness, yield stress or coefficient of thermal expansion) which give larger hot spot size.
Document ID
19800043839
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kennedy, F. E.
(Dartmouth College Hanover, N.H., United States)
Date Acquired
August 10, 2013
Publication Date
March 1, 1980
Subject Category
Mechanical Engineering
Accession Number
80A28009
Funding Number(s)
CONTRACT_GRANT: NGR-33-018-152
CONTRACT_GRANT: NSG-3253
Distribution Limits
Public
Copyright
Other

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