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3. Objective time rate

\begin{eqnarray*}\kTb=\dot{\Tb}-\Wb\Tb+\Tb\Wb \quad. \end{eqnarray*}

$\kTb$ is the co-rotational or ZAREMBA or JAUMANN stress rate. $\kTb$ is the stress change that results solely from the deformation of the considered material, whereas any apparent parts (due to rotations of the observer or of the reference frame) are removed.

Wolfgang Fellin