LS DYNA

hello im a M-Tech student..i need  help regaring LS DYNA.i want to model a composite plate with the orientations[0/45/-45/90] i want apply the orientations and how to view the orientations of the plies. and i want know how to predict delaminations when it is impacted by a rigid ball...in LS DYNA..plz help me out

Hi:

 I am simulating a projectile impact on a plate and using LS - DYNA for the same. 

I have to use Barlat's anistropic plasticity model with the Johnson Cook Failure Criterion.

Now, Although Barlat's Model is in built into LS DYNA, how do I implement JC Failure criterion ? Is there a feature of User defined failure criterion in DYNA ?

If not, Is implementing a UMAT consisting of Barlat's consitutive eqn and JC failure criterion the only other option ?

Thank You,

i need a big help. . .im having problems . . .in my problem there is a stationary block at origin . . .  a prisim is falling from some height . . . the problem is its workin fine . ..EXCEPT. . the prism is going through the block . . . i REALLY need help