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Interaction of heat production, strain rate and stress power in a plastically deforming body under tensile testAt high strain rates the heat produced by plastic deformation can give rise to a rate dependent response even if the material has rate independent constitutive equations. This effect has to be evaluated when interpreting a material test, or else it could erroneously be ascribed to viscosity. A general thermodynamic theory of tensile testing of elastic-plastic materials is given in this paper; it is valid for large strain at finite strain rates. It enables discovery of the parameters governing the thermodynamic strain rate effect, provides a method for proper interpretation of the results of the tests of dynamic plasticity, and suggests a way of planning experiments in order to detect the real contribution of viscosity.
Document ID
19820025870
Document Type
Conference Paper
Authors
Paglietti, A. (Cagliari Univ.)
Date Acquired
August 10, 2013
Publication Date
October 1, 1982
Publication Information
Publication: NASA. Langley Research Center Res. in Struct. and Solid Mech., 1982
Subject Category
STRUCTURAL MECHANICS
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.