Mathematical modelling in nonlocal Mindlin’s strain gradient thermoelasticity with voids

Moncef Aouadi^1, 2

¹ Université de Carthage, Ecole Nationale d’Ingénieurs de Bizerte, 7035, BP66, Tunisia
² UR Systémes dynamiques et applications, UR 17ES21, Bizerte, Tunisia

Mathematical modelling of natural phenomena, Tome 17 (2022), article no. 41.

Résumé

A nonlocal theory for thermoelastic materials with voids based on Mindlin’s strain gradient theory was derived in this paper with some qualitative properties. We have also established the size effect of nonlocal heat conduction with the aids of extended irreversible thermodynamics and generalized free energy. The obtained system of equations is a coupling of three equations with higher gradients terms due to the length scale parameters ϖ and l. This poses some new mathematical difficulties due to the lack of regularity. Based on nonlinear semigroups and the theory of monotone operators, we establish existence and uniqueness of weak and strong solutions to the one dimensional problem. By an approach based on the Gearhart-Herbst-Prüss-Huang theorem, we prove that the associated semigroup is exponentially stable; but not analytic.

Détail

DOI : 10.1051/mmnp/2022042

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