Thermal-Stress Analysis Procedure
Thermal-Stress Analysis Procedure
(OP)
I have been attempting to do a sequentially coupled thermal-stress analysis and I keep running into problems with the thermal data transferring from the thermal analysis to the mechanical analysis. This is procedure I am doing right now.
1. Run heat transfer analysis
2. Copy model and delete heat transfer step and use the same mesh for the stress model. Then create a stress analysis step.
3. Apply the temperature data to the stress analysis model using a predefined field.
Is this the correct way to do this or should I be using some other procedure such as defineing all the steps in one model?
Thanks
1. Run heat transfer analysis
2. Copy model and delete heat transfer step and use the same mesh for the stress model. Then create a stress analysis step.
3. Apply the temperature data to the stress analysis model using a predefined field.
Is this the correct way to do this or should I be using some other procedure such as defineing all the steps in one model?
Thanks





RE: Thermal-Stress Analysis Procedure
corus
RE: Thermal-Stress Analysis Procedure
RE: Thermal-Stress Analysis Procedure
corus
RE: Thermal-Stress Analysis Procedure
Using the same model that I used for the heat transfer analysis, I delete the heat transfer step and create a static, general step with the same time increments as the heat transfer model.
I apply the appropriate load and boundary conditions.
For the predefined field, I selected the temperature distribution "from results or output database file". Then I selected the .odb file from the heat transfer analysis. There are other options for Begin Step, Begin increment, End step, End Increment. I left all of these blank because I wasn't sure what to put there.
For the mesh, I keep the same mesh that was used in the heat transfer analysis; however, the element was changed to the one that you used in your report.
I run the analysis using a different job than what was used in the heat transfer analysis and I get an error that says this:
*TEMPERATURE MAY NOT BE USED WITH ELEMENTS THAT POSSESS TEMPERATURE DEGREES OF FREEDOM. USE *BOUNDARY TO PRESCRIBE BOUNDARY CONDITIONS ON TEMPERATURE
I've tried to use temperature boundary conditions and I still get the same error message.
Did you run across anything similar to this when you were developing your model? I really appreciate your help!!
RE: Thermal-Stress Analysis Procedure
Check the .sta file for the end increment value. If you only have one step then bstep=1, binc=1, estep=1 and einc will be however many increments it took.
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