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On the Representation of Effective Energy Densities

Published online by Cambridge University Press:  15 August 2002

Christopher J. Larsen
Christopher J. Larsen*
Affiliation:
Department of Mathematical Sciences, Worcester Polytechnic Institute, Worcester, MA 01609, U.S.A.; [email protected].
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Abstract

We consider the question raised in [1] of whether relaxed energy densities involving both bulk and surface energies can be written as a sum of two functions, one depending on the net gradient of admissible functions, and the other on net singular part. We show that, in general, they cannot. In particular, if the bulk density is quasiconvex but not convex, there exists a convex and homogeneous of degree 1 function of the jump such that there is no such representation.

Keywords

Relaxationquasiconvexityintegral representation.
Type
Research Article
Information
ESAIM: Control, Optimisation and Calculus of Variations , Volume 5 , 2000 , pp. 529 - 538
Copyright
© EDP Sciences, SMAI, 2000

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