Which program? ABAQUS, Comsol or Ansys

Try to read something about LS Dyna, its very good software for dynamics problems. I think, when you want to deal with dynamics problems, LS Dyna it's better than Ansys.

Reagards

Peter 

You should read this imechanica post: 

http://imechanica.org/node/6711

Mario 

Hello Giacomo

 I have to admit that I have no work experience with Ansys or Comsol, but I used Abaqus/Explicit for large deformation dynamical problems. I think it is pretty powerful.

My opinion is that you should use the one which gives you the better possibility to include your own material model into the calculatio. Abaqus has the UMAT/VUMAT interface where you can define your own material in a FORTRAN subroutine. I don't know whether Ansys or Comsol have such possibility.

You should not worry that Abaqus has only quadratic elements. Hierarchic elements or p-elements are beneficial mostly in small deformation elasticity problems. When plasticity is involved and in large deformation problems (e.g. crash) as the element distortion becomes excessive they lose their accuracy or even execute the calculation. Nearly all high speed dynamic simulations are run with linear elements. For a better discussion on that you may check Belytschko's book (Nonlinear Finite Elements for Continua and Structures).

 Regards, Andras

hi giacomo,

              I also suggest abaqus is the best when you go to dynamic problems.since in ansys it tough and time consuming to solve a simple dynamic problem.comsol is versatile and you can define the exact physics by the known governing equation of that physics.If you are strong in mathematics behind your problem you can choose comsol or abaqus is the best suited.

regards

ramkumar 

Hello Giacomo,

    I haven't used abaqus and comsol but I have worked 3 years at the channel partner of ANSYS. You can use ANSYS for pre/post processing and you can use Ls-Dyna for solution of the problem. ANSYS contains "shear response", "volumetric response" and "shift function" types of elements about porous-visco-elastic materials.

Best regards.

Mehmet.