Time-Temperature Equivalence for Rocks
Based on the theory of irreversible process thermodynamics, non-linear stress-strain-temperature equations are derived, together with an expression for time-temperature equivalence. In addition, an equation of shift factor for time-temperature equivalence is also obtained. The parameters in the equations are experimentally determined and the main curves for creep compliance and cohesion of TGP granite are obtained by a series of creep tests. It is proved that both deformation and strength of the TGP granite follow the time-temperature equivalent principle.
Ichsan Setya Putra and Djoko Suharto
Q. S. Liu et al., "Time-Temperature Equivalence for Rocks", Key Engineering Materials, Vols. 306-308, pp. 1397-1402, 2006