I m completely a new user of optimization. Pl let me now how to fix the following error
Altair EmployeeRROR # 1800: Stress/strain/force response is applied to
topology domain.
For stress-constrained topology optimization, please
use STRESS option on topology design variable definition.
Property ID = 5
***** FATAL INPUT ERROR *****
This error occurred in subroutine dppdrv1
Answers
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How have you defined the optimization constraint? This seems to suggest that your opitimization is using Property 5 and this is connected to a Stress based constraint. However, it looks like you haven't defined the Stress on the design variable (DESVAR) card. Can you post the design input from the model?
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I am also looking for the answer of this question. I am very new to optistruct. I wanna use stress as constrain for topology optimisation. I am getting same error. I have defined
analysis--> optimisation-->topology-->parameter-->stress-->defined my allowable(420MPa).
analysis-->optimisation-->response-->staticstress->vonmises
I used this response as dconstrain-->upperbound-->for the all loadstep.
I am getting same error as the dhiren getting. If anyone know the answer pls post.
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are you taking the volume fraction into account for response?
or else it wont accept the problem ,plz give compliance as your design objective
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When doing topology optimization stress constraint can be applied through analysis--> optimisation-->topology-->parameter-->stress-->defined my allowable.
Stress constraint defined on a stress response using the method below is not possible for topology optimization.
analysis-->optimisation-->response-->staticstress->vonmises
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It is always better to give compliance or vol or volfrac as response. If you give stress as constraint it is not necessary that you have to give response as stress.
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if anybody no the ans of this question please give me
Q.please use the stress option on design variable definition card
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Altair Forum User said:
Q.please use the stress option on design variable definition card
This means use Stress constraint through DTPL card. Goto Topology panel>> Parameters>> Stress constraint (See the image below)
<?xml version="1.0" encoding="UTF-8"?>
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