Journal
JOURNAL OF DIFFERENTIAL EQUATIONS
Volume 363, Issue -, Pages 195-242Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jde.2023.03.020
Keywords
Fine phase mixtures; Elastodynamics; Non-convex energy; Partial differential inclusion; Convex integration
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This article investigates the initial-boundary value problem for a class of equations of non-convex elastodynamics in one space dimension. It is proven that there are infinitely many local-in-time Lipschitz weak solutions to this problem, which exhibit immediate fine-scale oscillations of the strain whenever the range of the initial strain intersects with the elliptic regime. As a result, these solutions are nowhere C1 in the part of the space-time domain with fine phase mixtures, but are smooth in the other part of the domain.
We show that fine phase mixtures arise in the initial-boundary value problem for a class of equations of non-convex elastodynamics in one space dimension. Specifically, we prove that there are infinitely many local-in-time Lipschitz weak solutions to such a problem that exhibit immediate fine-scale oscillations of the strain whenever the range of the initial strain has a nonempty intersection with the elliptic regime. Consequently, such solutions are nowhere C1 in the part of the space-time domain with fine phase mixtures, but are smooth in the other part of the domain. (c) 2023 Elsevier Inc. All rights reserved.
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