Parts passing through solid walls in simulation

[Anonymous]

Hello,

I am completely new to autocad and its simulation features so I have no idea how to search for questions that are similar to this one. If there are past solutions, I would be grateful if you could point me to where I need to go. 

So I am trying to simulate 2 stress points(0.1 N) on a model under gravity and I noticed that parts of my model are going through walls that are solid. Is this something I ignore or is there a way to prevent this? In addition, is the gravity feature reflecting normal gravity? I'm assuming it just applies atmospheric gravity to the model and I guess that would be realistic so I left it on. Thanks a bunch for the help. 

[TheCADWhisperer]

Can you File>Export and then Attach your *.f3d file here?

Have you defined Contacts?

[Andrew.Sartorelli · Accepted solution]

Hi @Anonymous,

Welcome to the world of finite element analysis. It looks like the results you are getting a likely correct with the small load that you've applied. However, Fusion will use a scalar on the deformed shape to exaggerate the deformation so it's easier to see how the model behaves. You can change this by going to Results > Deformation Scale > Actual.

One important thing to keep in mind is that Fusion currently only has linear static stress, which does not allow for contact to occur between surfaces/faces that are not initially in contact. If you you defined a sufficient load to cause the faces to touch then they would penetrate each other. The good news is that non-linear static stress is on the Fusion roadmap!

Best Regards,

Andrew

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[Anonymous]

Hello,

here is my f3d file for my model. I have not added contacts as the model is one singular piece. Thanks for the help

[Anonymous]

Hello,

I have adjusted the result animation scale to actual and that solved it for me. I had really small stress points so I was blown away that my model would deform this much. Is the default set to adjusted 1.0x? Thanks a bunch for the help. 

[Andrew.Sartorelli]

Hi @Anonymous,

I'm glad I was able to help! I'll mark my answer as a solutions others can find the answer moving forward.

The results display will default to showing the 1x adjusted. In most models it's usually not as dramatic as your model, but especially when displacements are very small you can see strange behavior with this type of scaling.

Regards,

Andrew