Learning Forum

[noe.lacombe]

Hello, 

I'm trying to modelize high velocity impacts of tungsten balls on tungsten plates, with ranges from 600 to 4000m/s (subhypervelocity). Given the speed, I'd like to use Johnson Cook or Modified Zerilli Armstrong cards, but whenever I use them without the MAT_ADD_EROSION, I have either a non physical behavior (with ELFORM 1), or negative volume issues (ELFORM 2). If I add the MAT_ADD_EROSION card, the ball erodes too much if I use the criteria given in the litterature. Am I on the wrong path ? Are the EFFEPS, MXEPS, MINEPS dependent of the size of the mesh? Do you have any tips ? 

Thanks for you answers! 

[Nanda]

Hello User,

Ansys employees are not allowed to assist with this topic. Hopefully, you'll get help from other forum contributors.

Regards,

Nanda