Explicit dynamics simulation takes too long to solve


I put in place a simulation where a 25mm diameter punch must go through a composite plate (10*10mm).

I put the velocity of the punch to 0.0006mm/s and the end time to 60seconds because that is how it goes in real life. The problem is that I don't know why it takes forever to solve. I am new to Ansys so maybe my settings are wrong. I am desperately seeking for help.

the composite sample is on a steel plate that is used for support which has a 32mm diameter hole in its center.

Thank you in advance for your help.

Best Answer

  • peteroznewmanpeteroznewman Member
    edited December 2020 Accepted Answer


    Run a series of simulations where you change the velocity and end time by a factor of 100, 1000, 10000, 100000.

    Plot the Total Energy and the Kinetic Energy on each simulation.

    When Kinetic Energy is a very small percentage of the Total Energy, the simulation is very close to quasi-static.

    When Kinetic Energy is a significant percentage of the Total Energy, then the simulation is no longer quasi-static.


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