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  1. PatriotsRule

    Anybody with experience with FEA on pulling vacuum in a tank?

    Gbor I am going to try to set it up as you have mentioned and see if it works..I will keep you updated. Thanks for your help
  2. PatriotsRule

    Anybody with experience with FEA on pulling vacuum in a tank?

    Gbor The test set up is tank being raised to sit on two 2"x4 " wood blocks which are laying transversely to the length of the bottom of the tank and which are sitting (not fixed)on 4 inverted plastic buckets. This was done to measure the displacements on the bottom of the tank (it gives us some...
  3. PatriotsRule

    Anybody with experience with FEA on pulling vacuum in a tank?

    Gbor Unless I give a fixed constraint, I always get a rigid body motion error. How do I solve that problem?? Any ideas? Also I was told by our Workbench Help desk that to simulate a non linear buckling behavior, I need to turn the large deformation ON, which I did. What it does is allows the...
  4. PatriotsRule

    Anybody with experience with FEA on pulling vacuum in a tank?

    Thanks for your input btrue... I have a PE foam molded on to a PE skin so compatibility is not an issue (meaning they are chemically bonded) I am not too experienced in buckling and nonlinear modeling and my guess is that the physical tank is showing signs of buckling in the vacuum test (How do...
  5. PatriotsRule

    Anybody with experience with FEA on pulling vacuum in a tank?

    I am looking using ANSYS Workbench and am not getting comparitive results to a physical test. Material- Polyethylene and Foam composite Non-linear analysis The FEA results show higher tank stiffness compared to buckling like behaviour on the tank

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