On 5/1/19 9:45 AM, Nico Bombace wrote:
>
> > 2) I have seen some some impact/contact problems in the step tutorials,
> > would this work in dynamics as well?
>
> You'd have to write a time loop around it. In essence, you have to
> solve
> a nonlinear contact problem in each time step, for which there are
> tutorial programs. Then you move one time step forward which changes
> the
> position of the impactor and you have to solve a nonlinear contact
> problem again (for which you can use the previous state as a good
> initial guess).
>
>
> Would it be possible to use the fully explicit formulation of finite
> elements, with a lumped mass matrix?
> That would avoid the internal iterations and convergence issues (with
> a conditional time-step obviously).
Yes, sure. In that case, you really only need to be able to implement
the right hand side of the problem.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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