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Some problems on the theory of creepThe term creep of metals is applied to the phenomenon in which, at temperatures beyond a certain limit, the metal subjected to a load slowly undergoes deformation with time. For the case of steel, the creep phenomenon must be taken into account at temperatures above 400 degrees C. Very slow deformations for a prolonged period are cumulative and lead either to inadmissible changes in the dimensions of a structural part or to its failure. The theory of creep constitutes part of the mechanics of dense media and the mechanical formulation of the problem may be given as the following: a body is subjected to the action of a given system of forces, or initial displacements are prescribed on its surface. It is required to find the stress distribution in the body and the changes or its deformations with time. For the solution of the problem of creep as thus formulated, a mechanical theory of creep is required. Such theory must necessarily bear an external, overall character based, not on the investigation of microprocesses, but on the results of mechanical tests.
Document ID
19930093877
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Rabotnov, Y N
Date Acquired
August 16, 2013
Publication Date
April 1, 1953
Report/Patent Number
NACA-TM-1353
Report Number: NACA-TM-1353
Accession Number
93R23202
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
METALS - CREEP
THEORIES - CREEP
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