A finite strain micromechanical analysis is generalized for the modeling of
thermoviscoelastic matrix composites. The thermoviscoelastic matrix of the
composite is represented by a finite thermoviscoelasticity theory that permits (in
contrast to finite linear thermoviscoelasticity theories) large deviations away from
thermodynamic equilibrium. As a result, it is possible to subject the composite to
large thermomechanical loadings. In addition, the possibility of evolving damage in
the matrix is included. The derived micromechanical model is applied to investigate
the behavior of a thermoviscoelastic rubber-like matrix reinforced by steel fibers in
various circumstances. By subjecting the composite to mechanical loading
under isentropic conditions, the micromechanical model is employed for
the prediction of thermoelastic inversion point at which the Gough–Joule
phenomenon at the rubber-like phase occurs. Results are given that show the
effect of damage, elevated temperature and viscoelasticity of the matrix
on the global response of the composite including its creep and relaxation
behavior.
Keywords
finite thermoviscoelasticity, large deformations,
Rubber-like matrix composites, evolving damage, finite
strain high-fidelity generalized method of cells
