von mises stress in lattice opti.
Hı,
I want to create stress restriction in lattice optimization. So I am changing the value in the image below. But I do not see any change when I check the analysis results. (von mises).
Can you help me?
Answers
-
Hi @Busra ASlan
Can you try in phase 2 of lattice optimization instead of phase 1
Provide a stress constraint in phase and check if that helps.
0 -
Thank you for your answer.
But the same error occurred when I resolved it again.
I share my files with you.
Can you check?
0 -
The stress target in topology optimization is applied globally to the model (including non-design space). Please refer to the online help for the DTPL card (especially comment #1). It is through the DTPL card and not a DCONSTR
From FAQ section of help:
The stress constraint definition in a topology optimization is a global constraint and does not target local stress concentrations. These areas can be addressed subsequently through size, shape, and free shape optimization or a combination thereof. Artificial stress concentrations are filtered out during topology optimization with stress constraints.0 -
Hi,
Sorry for a late reply. Stress constraint on latticeworks a little different.
Here is a doc which helps with stress constraint.
0 -
Thank you for everything.
I understand, Stress constraint has little effect for lattice structure. When I examine lattice type (1, 2, 3, 4) seems to have little an effect. Ok, then which parameter should I use for the changes analysis result aside from lower and upper bound lattice.
I tried stress constraint for topology optimization, but I still can not see any changes. Analysis----optimization---topology---parameters---stress constraint...
As I change stress constraint have to change element stress and displacement values, is that correct ?
0 -
Hi @Busra ASlan
During topology the stress constraint may or may not have any effect during the first phase.
In order to have a better concept, try with compliance and volume fraction and in phase two stress constraint can be added.
0
Altair Employee