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A constitutive law for finite element contact problems with unclassical frictionTechniques for modeling complex, unclassical contact-friction problems arising in solid and structural mechanics are discussed. A constitutive modeling concept is employed whereby analytic relations between increments of contact surface stress (i.e., traction) and contact surface deformation (i.e., relative displacement) are developed. Because of the incremental form of these relations, they are valid for arbitrary load-deformation histories. The motivation for the development of such a constitutive law is that more realistic friction idealizations can be implemented in finite element analysis software in a consistent, straightforward manner. Of particular interest is modeling of two-body (i.e., unlubricated) metal-metal, ceramic-ceramic, and metal-ceramic contact. Interfaces involving ceramics are of engineering importance and are being considered for advanced turbine engines in which higher temperature materials offer potential for higher engine fuel efficiency.
Document ID
19870003491
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Plesha, M. E. (NASA Lewis Research Center Cleveland, OH, United States)
Steinetz, B. M. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
November 1, 1986
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.15:88838
NASA-TM-88838
ICOMP-86-1
E-3181
Accession Number
87N12924
Funding Number(s)
PROJECT: RTOP 505-63-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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