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Oscillations in a dynamical model of phase transitions

Published online by Cambridge University Press:  11 July 2007

Deborah Brandon
Affiliation:
Department of Mathematical Sciences, Carnegie Mellon University, Pittsburgh, PA 15213, USA
Irene Fonseca
Affiliation:
Department of Mathematical Sciences, Carnegie Mellon University, Pittsburgh, PA 15213, USA
Pieter Swart
Affiliation:
Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA

Abstract

The creation and propagation of oscillations in a model for the dynamics of fine structure under viscoelastic damping is studied. It is shown that oscillations in the velocity ut are lost immediately as time evolves, while oscillations in the initial strain ux cannot be created, and they persist for all time if initially present. Uniqueness of generalized solutions (Young measures) is obtained, and a characterization of these Young measures is provided in the case of periodic modulated initial data.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 2001

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