Uniqueness and exponential instability in a new two-temperature thermoelastic theory
José R. Fernández, R. Quintanilla, Departamento de Matemáticas, E.S.E.I.A.A.T.-U.P.C., Colom 11, 08222 Terrassa, Barcelona, Spain
Abstract
<abstract> In this work we consider the temperature-rate dependent two temperatures thermoelastic theory. It has been proposed very recently. We study the case in which the elasticity tensor may not be positive definite. Thus, the problem can be ill posed in the sense of Hadamard. We adapt the logarithmic convexity argument to the specific situation proposed by this theory. That is, we define a suitable function on the solutions satisfying that the logarithm is convex. Uniqueness and instability of the solutions under suitable conditions on the constitutive tensors are proved. </abstract>
Topics & Concepts
Thermoelastic dampingUniquenessLogarithmConvexityMathematicsConvex functionInstabilityExponential functionArgument (complex analysis)Mathematical analysisRegular polygonFunction (biology)Applied mathematicsPhysicsThermalThermodynamicsGeometryMechanicsEconomicsBiologyEvolutionary biologyBiochemistryChemistryFinancial economicsThermoelastic and Magnetoelastic PhenomenaElasticity and Material ModelingNonlocal and gradient elasticity in micro/nano structures