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An optional indicator to select whether fixing volume stress rate over time step or over coupling iteration for the staggered scheme. If it is not given, volume stress rate is fixed over coupling iteration in the fixed stress splitting approach in each time step.
If set, the volume stress rate is fixed over time step, e.g.
\[\dot{\sigma}_v^{n} = \dot{\sigma}_v^{n-1}, \]
where \(n\) is the time step index. Otherwise, the volume stress rate is fixed over coupling iteration, e.g.
\[\dot{\sigma}_v^{n, k} = \dot{\sigma}_v^{n, k-1}, \]
where \(k\) is the coupling iteration index, and
\[ \dot{()}^{n, k} = \left(()^{n, k} - ()^{n-1}\right)/dt. \]
"false".std::string
1.10.0