On non-equilibrium entropy in continuum thermodynamics of materials with memory

摘要: BASED ON PREVIOUS WORKS of the author, fundamentals some basic concepts and methods currently used in formulation constitutive equations for linear or non-linear dissipative materials are revisited. The principles local state - equilibrium frequently as basis Thermodynamics Irreversible Processes connection with problem definition a non-equilibrium entropy discussed, emphasis laid on memory exhibiting viscoelasticity delayed response to constant loading. An adiabatic relaxation experiment is defined, from which it shown that usual principle too strong, since set relations holds equilibrium, makes use macroscopic variables only, can never be applied without modification out equilibrium. same Gibbs equation generally associated corresponding formalism when written real stress temperature involved process. For behaviour differential type order one, called also Markovian behaviour, defined situations. From this, thermodynamic classification rheological obtained. In non-Markovian case, results method internal variables. A criterion identifying suitable They should correspond directly stimulated.