Geodesic
Bounds and estimates on the effective properties for nonlinear composites
Applications of Mathematics, Tome 45 (2000) no. 6, pp. 419-437.

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In this paper we derive lower bounds and upper bounds on the effective properties for nonlinear heterogeneous systems. The key result to obtain these bounds is to derive a variational principle, which generalizes the variational principle by P. Ponte Castaneda from 1992. In general, when the Ponte Castaneda variational principle is used one only gets either a lower or an upper bound depending on the growth conditions. In this paper we overcome this problem by using our new variational principle together with the bounds presented by Lukkassen, Persson and Wall in 1995. Moreover, we also present some examples where the bounds are so tight that they may be used as a good estimate of the effective behavior.
DOI : 10.1023/A:1022381416707
Classification : 35B27, 73B27, 74Q20
Keywords: homogenization; effective properties; variational methods; nonlinear composites 
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Wall, Peter. Bounds and estimates on the effective properties for nonlinear composites. Applications of Mathematics, Tome 45 (2000) no. 6, pp. 419-437. doi : 10.1023/A:1022381416707. http://geodesic.mathdoc.fr/articles/10.1023/A:1022381416707/

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