difference between shell model and 3d

[stef_design]

Hey, guys.
I am doing comparative tests between an analysis with a shell model (sole surfaces) and the same model but with thickness.
If I apply the same materials, constraints and loads I get 2 different results.
How come?
I hope that from the attached pdf you can understand something, cmq the procedure I followed is the following:
3d model:- amount of the model
- I make mesh with 'element size' 2 mm
- material stick (alloy to), load (400 kgf) and constraints (fixed support)
shell model:- amount of the model
- I attach a thickness of 2.5 mm with 'offset type' = top
- I make mesh with 'element size' 2 mm
- material stick (alloy to), load (400 kgf) and constraints (fixed support)

 

[stef_design]

I also train the 3d model if someone wants to do tests.
Hi.

 

[Onda]

try to block the scale of stress at a predetermined value for both analyses and assess differences. I think it's a constraint problem.
blocks the scale to 200 mpa and evaluates if the two models are similar. the peak value in my judgment does not mean much

 

[stef_design]

try to block the scale of stress at a predetermined value for both analyses and assess differences. I think it's a constraint problem.
blocks the scale to 200 mpa and evaluates if the two models are similar. the peak value in my judgment does not mean much

Hi, can you tell me how to lock the stress scale at a precise value?
I don't have ansys right now so I can practice.
Thank you.

 

[Onda]

No.
Sorry.