Young-measure approximations for elastodynamics with non-monotone stress-strain relations
Carstensen, Carsten ; Rieger, Marc Oliver
ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 38 (2004), p. 397-418 / Harvested from Numdam
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Microstructures in phase-transitions of alloys are modeled by the energy minimization of a nonconvex energy density φ. Their time-evolution leads to a nonlinear wave equation u tt =divS(Du) with the non-monotone stress-strain relation S=Dφ plus proper boundary and initial conditions. This hyperbolic-elliptic initial-boundary value problem of changing types allows, in general, solely Young-measure solutions. This paper introduces a fully-numerical time-space discretization of this equation in a corresponding very weak sense. It is shown that discrete solutions exist and generate weakly convergent subsequences whose limit is a Young-measure solution. Numerical examples in one space dimension illustrate the time-evolving phase transitions and microstructures of a nonlinearly vibrating string.

Publié le : 2004-01-01
DOI : https://doi.org/10.1051/m2an:2004019
Classification:  35G25,  47J35,  65P25 
@article{M2AN_2004__38_3_397_0,
     author = {Carstensen, Carsten and Rieger, Marc Oliver},
     title = {Young-measure approximations for elastodynamics with non-monotone stress-strain relations},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique},
     volume = {38},
     year = {2004},
     pages = {397-418},
     doi = {10.1051/m2an:2004019},
     mrnumber = {2075752},
     zbl = {1130.74383},
     language = {en},
     url = {http://dml.mathdoc.fr/item/M2AN_2004__38_3_397_0}
}

Carstensen, Carsten; Rieger, Marc Oliver. Young-measure approximations for elastodynamics with non-monotone stress-strain relations. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 38 (2004) pp. 397-418. doi : 10.1051/m2an:2004019. http://gdmltest.u-ga.fr/item/M2AN_2004__38_3_397_0/

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