Learning Forum

[Joshua Monsey]

Hello,

I am trying to simulate a projectile impact onto a plate in LS-DYNA, and have been using the Johnson-Cook criteria for failure. However, when I run the simulation, it does not show fracture or damage the way I would expect. Instead, it simply stretched the plate. Is there a parameter that I might have missed?

The materials selected for the plate are aluminum and titanium.

Thank you.

 

[Ram Gopisetti]

Hi Joshua, 

can you post your material card here ?, Did you define D1-D5 parameters ?, Are there any additional failure criteria defined?

Is the strain rate in your model enough to progress to failure?

Cheers, Ram 

[Joshua Monsey]

Hello,

Here is the material card for the aluminum. The titanium one is defined in a similar manner.

There is no other failure criteria defined.

- Joshua Monsey

[Joshua Monsey]

Hello,

I managed to solve it. I didn't fully define some settings in the failure criteria.

Thank you,

Joshua Monsey