Strange behavior of fem simulation of elastic part

Strange behavior of fem simulation of elastic part

Anonymous
Not applicable
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Message 1 of 7

Strange behavior of fem simulation of elastic part

Anonymous
Not applicable

Dear board friends,

 I designed a small part (chain) for 3d printing with thermoplastic polyurethane. Later tis part will be stretched and the developed reactive force is my main interest. One ring is fixed and on the other, a linear force is applied following the line of the middle part. I managed to configure already custom material properties.

CAD-construction was no problem, but when applying a force in the simulation module the chain bends to one side and is not stretched as expected. What did I do wrong??

with kind regards

Karl

 

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430 Views
6 Replies
Replies (6)
Message 2 of 7

TheCADWhisperer
Consultant
Consultant

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

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Message 3 of 7

Anonymous
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Thank you for the answer. I attached the file. 

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Message 4 of 7

TheCADWhisperer
Consultant
Consultant

See Attached.  

(Be careful - I changed your original model as it wasn't fully defined.)

TheCADWhisperer_0-1611838805413.png

 

 

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Message 5 of 7

Anonymous
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Thank your for the help! it works - what was my mistake? as my last question for now... i see there is a small rectangle new at the side where the force is acting.

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Message 6 of 7

TheCADWhisperer
Consultant
Consultant

Check this example.

1. Your Sketch1 was not properly defined.

2. When I fully defined the sketch - one of the Hole features did not update position properly - so it was not correctly located.

3. The load was placed on edge rather than on face.

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Message 7 of 7

Anonymous
Not applicable

Dear CadWhisperer,

thank you very much for your effort to help me. I am not so experienced with Fusion360 FEM and CAD is far away from my studied profession. However, your solution seems to fix the problem quite quickly (I guess?).

"properly defined" means something went wrong from 2D sketch to 3D shape. I constructed one rectangle and two circles at the edges, I marked the sketch, and extruded it. Then I placed I drill hole (? my Fusion user interface is in German...). Sorry for this basic question. 

best wishes karl

 

 

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