Sequentially coupled thermal-stress analysis

[grnlan03]

I am trying to run sequentially coupled thermal stress analysis. I run the uncoupled heat transfer analysis first. Then I copy the file and use the same mesh in a mechanical analysis where I apply predefined temperature field, delete the thermal step from before and create a new mechanical step with boundary conditions. The problem occurs when I try to run the model. I keep on getting an error saying that it can not find the .odb file. When I follow the file path the file is in the right place. Has anyone seen this before?

Thanks

 

[corus]

Is it the odb file or perhaps the step and increment that it can't find?

corus

 

[grnlan03]

I believe I figured it out. It had something to do with the a network drive I was running the working directory. I just changed the drive and it kinda worked.

Thanks

 

[kag50]

I've decided to use a sequentially coupled thermal-stress analysis for my model. I was able to successfully replicate the heat transfer analysis part of the model. I'm having a problem when I try to run the stress analysis using the nodal temperatures as a predefined field. Here is what I'm doing:

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!!

 

[corus]

Please don't post the same question twice in the same forum ffs.

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