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  • Users: mgage
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  1. mgage

    Ansys 12 Plasticity

    Once you get yielding through the entire cross section of your pipe the analysis will fail. This is due to the fact that any more load will result in an infinite displacement because you are perfectly plastic. I've done this exact type of analysis before by using time steps to "sneak" up to...
  2. mgage

    Two FEA runs and different results for the same model !!!

    If the boundary conditions, loads and geometry are the same in both models, then I would look at the material properties. Possibly different units or a typo?
  3. mgage

    Wierd meshing problem

    It was even wierder than I thought, the parts would mesh if they were far enough apart. The solutiion I found was to create a volume region on the flange part, basically creating a tube within the flange. Now they mesh just fine. Autogem must have struggled with the fact that the tube wall...
  4. mgage

    Wierd meshing problem

    Hello All, I have a two piece assembly consisting of a tube with a flange welded onto it. The flange was placed first,with the tube mated to it. When I meshed, only the flange would mesh and no elements were created for the tube. When I opened up the tube by itself, it meshed without any...
  5. mgage

    Press fit seal between two BeCu cylinders, *pics*

    I ran into this problem very recently. When you created your design study, did you check the "nonlinear" checkbox. Doing this opens up the "include contacts" checkbox. I wasted a whole day trying to get anything but bonded contact to work until I discovered this. Marcus
  6. mgage

    Part passing FEA but failing lab test

    Well a few things that come to mind are: 1) your model does not capture the test correctly 2) there is something wrong with your material properties there are many more possibilities but without more specific information that's where I would start looking. Marcus
  7. mgage

    How bad is it in the US?

    Falling Down
  8. mgage

    nonlinear statics on a previously deformed model

    Peter, I'm not sure what software you're using, but you can do what you want with ANSYS. You can do it by a RESTART or creating Load Steps, look in the help for these. I'm not sure how other FEA programs do this. Hope this helps, Marc
  9. mgage

    Encouraging women to enroll in engineering

    I think that the other building set that you're referring to is Tinker Toys. I didn't have Transformers either, but my friends did.
  10. mgage

    Using Deformed Shapes

    Zartan, Yes, if you go to Solution, and then select Restart, you can then continue your analysis. Look in the Ansys help file for Restarts. Hope this helps, marc
  11. mgage

    Structure with Different Modulus when in Tension vs. Compression

    Hi Gill, If you go to www.ansys.net or the xansys group on yahoo you can download the macro bilinear.mac. This macro runs your problem once, determines which elements are in compression/tension, then reruns the problem assigning the appropriate modulus. Hope this helps. Marcus
  12. mgage

    Scale geometry in Ansys

    Yes, Go to PreProcessing->Modelling->Operate->Scale
  13. mgage

    ANSYS LS DYNA Documentation

    you can download the user, theory, and example manuals from www.lstc.com.
  14. mgage

    ANSYS modelling question

    Thanks for the tip. I actually took it a step further and reduced the yield stress and the stresses along the curve by 75 percent. The results matched well with the physical data. The test now is wether the model predicts the correct deformed shape (which I haven't seen yet) and if it can...
  15. mgage

    ANSYS modelling question

    In our testing, the seals are compressed to a height of 0.051". The load is removed and the final height of the seal is 0.0535", giving a springback of 0.0025". The load to get this compression was 330lbs. I was given true stress-true strain data for my model. My biso model...
  16. mgage

    ANSYS modelling question

    I am currently modelling a metallic seal made of 316l stainless steel. The outputs I'm most concerned with are the load to compress the seal 0.01" and the resulting springback after unloading. I've tried to match physical testing data without much luck. The biso and miso hardening rules...

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