Issues with the expansion of my model

- February 7, 2023 at 11:32 am
  
  Adrian Herranz Mollejo
  Subscriber
  
  Hello everyone! im modelling a gelatin ballistic on LS DYNA as a material 10 with an EOS polynomical for my final grade task. My issue comes at the time i run it, the gelatin starts to expand more and more to the infinite due to an steel impact. It cannot happen, what do you think i am doing wrong with it?
- February 8, 2023 at 9:35 pm
  
  Andreas Koutras
  Ansys Employee
  
  Hello, I suggest you try with a low TSSFAC value, such TSSFAC=0.5 or lower, on CONTROL_TIMESTEP in case this behavior is due to an instability. Also make sure the coefficients in the *EOS_001 card are in the correct pressure units. The initial relative volume V0 is usually set to 1.0 or to 0.0, which defaults to 1.0.

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