Figures 4.10 and 4.11 show the result of applying linear damping on the dynamically inserted cohesive elements for the ``horizontal'' and ``mixed'' cases. From trial and error the optimal damping coefficients for insertion at and are and for the "horizontal" case, and and for the ``mixed'' case, respectively. From the figures, we can see that linear damping does minimize the oscillations after some initial time, although, our experimentation has shown that if the coefficient is too large, the solution can diverge from the reference solution.

