A constitutive model is developed to predict the viscoelastic response of polyimide resins
that are used in high temperature applications. This model is based on a thermodynamic
framework that uses the notion that the 'natural configuration'of a body evolves as the body
undergoes a process and the evolution is determined by maximizing the rate of entropy
production in general and the rate of dissipation within purely mechanical considerations.
We constitutively prescribe forms for the specific Helmholtz potential and the rate of …