학술논문
Stability approach to testing the constitutive relations of superplasticity.
Document Type
Article
Source
Subject
*STABILITY (Mechanics)
*SUPERPLASTICITY
*METALS
*DUCTILITY
*LAGRANGE equations
*EQUATIONS of motion
*POLYHEDRA
*ANALYTICAL mechanics
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Language
ISSN
0021-8944
Abstract
An approach to testing the suitability of the constitutive relations for describing superplasticity is proposed based on an analysis of the stability conditions of uniform extension of samples with respect to small perturbations of the current configuration. The necessity of accounting for the partial preservation of the local topology in varying the equations of motion is shown using a simple (nonlinear viscous) model of a superplastic medium. [ABSTRACT FROM AUTHOR]