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AS_863467110-Marble
10-Marble
Apr 25, 2023 8:11 AM UTC
Question

Simulation CREO Material

Hallo,

I have a problem with my simulation......

no matter what material I use for my simulation the result remains the same. I may have a bad configuration of CREO...  someone has already had this problem an can help me?

thanks a lot

 

 

 

 

16 replies

Chris3
Chris321-Topaz I
21-Topaz I
Apr 25, 2023 10:58 AM UTC

You are going to need to provide more information. Likely causes:

 

  1. Your input is using the wrong units and is just over whelming the results regardless of what material you choose (what is your load?)
  2. Your material files do not have accurate material properties (can you share a screenshot?)
  3. You have a degree of freedom that is very weak (ie a low stiffness spring) and that is just absorbing all of the energy

The more information you can provide the better the answer you are going to get.

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AS_863467110-MarbleAuthor
10-Marble
Apr 25, 2023 12:11 PM UTC

Hallo Chris3,

thank you for your response

I try to load the Plate to breaking  strength (15KN) but I always get a very high stress at one point (see attachment)

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Chris3
Chris321-Topaz I
21-Topaz I
Apr 25, 2023 1:28 PM UTC

Material values look ok

 

It looks like you have two different loads being applied its unclear how they are being applied. It also appears that you have the 3 front surfaces constrained in all degrees of freedom. Is this part welded and then there is a load being applied on the half spheres? If not how is the load being applied? I question whether or not all 3 of those surfaces are really constrained in all degrees of freedom in your real application. Stresses can be very high when you over constrain the geometry so it has no where to go. In real life though this is likely not the case. It will twist and or translate to relieve the stress.

 

When you change the material is the stress always 3206.51 or does the number change even a little bit?

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tmoser12-Amethyst
12-Amethyst
Apr 25, 2023 12:58 PM UTC

Are the units in your model set to mmNS and not mmKgS? That would throw your results of by a factor of 9.81.

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AS_863467110-MarbleAuthor
10-Marble
Apr 25, 2023 1:05 PM UTC

I simulated this in mmNs

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    tmoser12-Amethyst
    12-Amethyst
    Apr 25, 2023 1:24 PM UTC

    The stress pattern looks good. Have you done a rough hand calculation to get a ballpark figure of what your stress results should be?

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    SweetPeasHub17-Peridot
    17-Peridot
    Apr 26, 2023 12:18 PM UTC

    For a single material, single component the stress is not a function of material. Try changing materials dramatically and look at the deflection instead.

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      ChrisKaswer16-Pearl
      16-Pearl
      Apr 26, 2023 12:40 PM UTC

      Indeed! Please recall that "stress = force / area" - material properties are not part of this 1st principal relation. Always review displacement magnitudes and their exaggerated animation before making conclusions...and always review other stresses besides von Mises (like max & min principal)...and check your strains when applying polymers!

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