Reply To: LS-Dyna, Negative volume problem.

[Dennis Chen]

 

anarberk, the way you added the command snippit to add the ls-dyna mat/section/contact is not how you do this inside workbench ls-dyna.  I don’t have a very short video explaining how this is done but i just made a tutorial video for a hail-strike analysis where I used the same command snippit to define mat,eos,contact like you wanted to do, maybe you can quickly scan through below video and see if it helps you.

https://www.youtube.com/watch?v=SJVvZiCq-Hk

there are also likely numerous other issues with this model.    I would recommend maybe starting with a less complicated model or dissect your current problem into serveral smaller models and then focusing on one part at a time.   For example, you could focus on how to properly define fluids in the lagrangian frame by building a simple example model (see mat_null).    

Best of Luck.