Confusing behaviour of the beam model
Confusing behaviour of the beam model
(OP)
Hi,
I have found myself in a quite confusing situation.
My beam model does not behave as I expected.
I included 3 photos to show the model. Basicly the only difference between them is the diameter of lateral support (the shortest section in the model, the changes in diameter are visible, thickness of this sections remain the same).
When I decreased the radius of this lateral support stresses level is also decreasing. Comparing the size of the support 25(radius) (186MPa) & 10 (150 MPa) & 20 (195 MPa).
Why for the smallest tube the stresses level are the lowest?
Can you help me to understand this problem is it "normal" or is it something wrong with my model?
I have found myself in a quite confusing situation.
My beam model does not behave as I expected.
I included 3 photos to show the model. Basicly the only difference between them is the diameter of lateral support (the shortest section in the model, the changes in diameter are visible, thickness of this sections remain the same).
When I decreased the radius of this lateral support stresses level is also decreasing. Comparing the size of the support 25(radius) (186MPa) & 10 (150 MPa) & 20 (195 MPa).
Why for the smallest tube the stresses level are the lowest?
Can you help me to understand this problem is it "normal" or is it something wrong with my model?
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RE: Confusing behaviour of the beam model
When I post-process stress on beam elements I take the max (Abs) of these four output vectors:
EndA Max comb stress
EndA Min comb stress
EndB Max comb stress
EndB Min comb stress
Try to post-process like that and see if results become as you've expected..
Seif Eddine Naffoussi, Stress Engineer
www.Innovamech.com
33650 Martillac û France
RE: Confusing behaviour of the beam model
EndA Max comb stress
EndA Min comb stress
EndB Max comb stress
EndB Min comb stress
is the same so this won't change anything.
RE: Confusing behaviour of the beam model
You can see that the stress distribution is transferred to the medium section which is not the case in your first case.
Seif Eddine Naffoussi, Stress Engineer
www.Innovamech.com
33650 Martillac û France
RE: Confusing behaviour of the beam model
i'd look at where the load is going (rather than the stress) ... internal shears and bending moments should help you understand what's happening.
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