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Dynamics in ZebulonZebulon has implicit dynamics with contact available. A general purpose explicit solver is in development.
The input file can be seen here. Quite a few
options are used, including element formulation specified, automatic time
stepping with material control, "expiring" boundary conditions, loading
tables, multi-zone contact, output with specific variables specified,
direct curve output (during the computation, no post processing), and
multiple materials defined.
Eigen solutions
Modal analysis is also available in Zebulon. A variety of
options are implemented, including loading a preloaded
stiffness matrix for the modal analysis. Post processing
in Zmaster allows the deformed modal profiles to be easily
visualized. At right are a couple of the modes in a plate.
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This example is of a massive (fictionally so) ball accelerated
with an applied force initially, released and left to impact
the wall. Both the wall and ball have a hardening plastic behavior.
Very carefull automatic time stepping with control on the
amount of deformation is necessary, because the plastic deformation
solution during impact has a strong influence on the post impact
path. Also it is important to use finite strain because the
ball rotates several complete times after the second impact.