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Cannot see material failure in simulation

    • Joshua Monsey
      Subscriber

      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
      Ansys Employee

      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
      Subscriber

      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
      Subscriber

      Hello,

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

      Thank you,

      Joshua Monsey

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