LS Dyna

LS Dyna

Von mises , tresca

    • Medri17
      Subscriber
    • Medri17
      Subscriber
      can somebody please help ?

    • Ram Gopisetti
      Ansys Employee
      rest the frings and check agin
      Cheers, Ram
    • Medri17
      Subscriber
      I found the solution , i didint activate database extent binary , now when i did , von mises plots , but i have another problem , some Von mises deformations plot before impact , i activated cross section , maybe thats the reason why ?

    • Jim Day
      Ansys Employee
      Assuming the vehicle is given an initial velocity (INITIAL_VELOCITY_...), check to make sure the velocity is uniform in the first plot state at t=0. You can do this by plotting velocity vectors or fringing resultant velocity at t=0. If the velocity is not uniform, stress will naturally develop.
    • Medri17
      Subscriber
      the velocity is uniform , yet im getting 1800 mpa before impact?
    • Jim Day
      Ansys Employee
      As an experiment, comment out or remove all *CONTACT input. If that resolves the unexpected stress before impact, then we know the problem is due to contact. Reply back after you perform this experiment.
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