ABSTRACT
In the absence of heat flux and source, the free energy satisfies the Clausius-Duhem inequality, i.e.:
S C: − − ≥ 1 2
0 ψ ηθ
(4)
where S is the second Piola-Kirchoff stress, C = FTF is right Cauchy Green strain tensor, η is entropy and θ is absolute temperature. All quantities are defined per unit reference volume.
