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Table 1 Some creep invariants encountered in the literature (see, e.g., Ref. [61])

From: Symmetry analysis and equivalence transformations for the construction and reduction of constitutive models

Authors Invariant(s)
Larson & Miller \(T (\log t +\log B_2)\)
Dorn \(\frac{B_1}{T}-\log t\)
Monkman-Grant \(\log t_R + m \log {\dot{\varepsilon }}_{min}\)
Modified Monkman-Grant \(\log \left( \frac{t_R}{\varepsilon _R}\right) + m' \log {\dot{\varepsilon }}_{min}\)