LS Dyna

LS Dyna

Can water withstand negative pressure in Autodyn (I choose shock for EOS model )?

    • limandinuo
      Subscriber

      I simulated the underwater electrical wire explosion in Autodyn.The shock wave travels through the water and creates negative pressure in the water.

      Is the result right?Should I add a failure model for water?

      water material model

    • limandinuo
      Subscriber
    • Chris Quan
      Ansys Employee
      You can apply Failure Model -> Hydro (Pmin) to limit the negative pressure in a material. For fluid materials like water, you can also set Reheal to Yes for the Pmin failure.
      Thus, when the negative pressure in the material exceeds the Pmin, the material will break and then a void will be created. When the material has a positive pressure and comes back to fill the void, the material becomes the water again, having the same material properties as the one before break.

    • Chris Quan
      Ansys Employee

    • limandinuo
      Subscriber
      got it,thank you~
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