Periodic homogenization for fully coupled thermomechanical modeling of dissipative generalized standard materials

• Homogenization framework accounting for equilibrium and thermodynamics laws.
• Micro/macro energy potentials and dissipation through asymptotic expansion method.
• Incremental, linearized formulation to obtain macroscale tangent moduli.
• Framework capabilities are illustrated with examples on multilayered composites.

The current work deals with periodic thermomechanical composite media, in which the material constituents are considered to obey the generalized standard materials laws. The aim is to provide a proper homogenization framework that takes into account both the equilibrium and the thermodynamics laws in microscale and macroscale levels. The study is based on the asymptotic expansion homogenization technique, which permits to deduce useful results about the general structure of microscale and macroscale energy potentials and constitutive laws. The paper also proposes an incremental, linearized formulation that allows to identify suitable thermomechanical tangent moduli for the macroscale problem. The capabilities of this framework are illustrated with numerical examples on multilayered composites.