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On the Stability of the Cauchy Problem of Timoshenko Thermoelastic Systems with Past History: Cattaneo and Fourier Law (1808.08499v2)

Published 26 Aug 2018 in math.AP

Abstract: In this paper, we investigate the decay properties of the thermoelastic Timoshenko system with past history in the whole space where the thermal effects are given by Cattaneo and Fourier laws. We obtain that both systems, Timoshenko-Fourier and Timoshenko-Cattaneo, have the same rate of decay $(1 + t){-1/8}$ and satisfy the regularity-loss type property. Moreover, for the Cattaneo case, we show that the decay rate depends of a new condition on the wave speed of propagation $\chi_{0,\tau}$. This new condition has been recently introduced to study the asymptotic behavior in bounded domains, see for instance [5] and [27]. We found that this number also plays an important role in unbounded situation, affecting the decay rate of the solution.

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