Thank you for your answer, I have only a further small comment On 5/1/19 9:02 AM, Nico Bombace wrote: > > > > After some time using Abaqus/Explicit, I decided to start to code my > > library because it would give more liberty in terms of implementation of > > new algorithms. > > I am starting the deal.ii video lectures and tutorials and I have some > > questions regarding a particular class of problems, namely impacts in > > solid mechanics. I did search the publication section without much > success. > > > > 1) Does deal.ii implement the central time difference time marching > scheme? > > Time stepping schemes are generally easy enough that they are not > implemented in the library itself, but in user code. But there are > numerous time dependent programs that you can take a look at. > > > > 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). Kind regards, Nico > > > 3) Does deal ii support element erosion based on the internal state of > > an element? > > Sort of. You will want to take a look at step-46, which shows how you > can switch an equation on/off on individual cells. > > Best > W. > > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: bang...@colostate.edu > <javascript:> > www: http://www.math.colostate.edu/~bangerth/ > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
