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Penalty formulation

In contact analysis, normal forces Fn follow from the condition that bodies cannot penetrate each other. Since we use a penalty formulation, the normal force is given by


\begin{displaymath}
F_n = \lambda u_n
\end{displaymath}

where u is the penetration and $\lambda$ is called the contact_penalty_velocity because its generates forces on the velocity unknowns. You can also impose groundflow_pressure and condif_temperature contact conditions by respectively the penalty factors contact_penalty_pressure and contact_penalty_temperature.



root
1998-11-16