Steady state thermal with isotropic temp dependent material

[Inv_kaos]

I have created two temp dependent materials and applied them to my model but I can't get the run to finish with the following error message:

missing Material(1).Heat.Orthotropic(1).Conduct.Y

Error. Invalid or missing data

I don't know what is missing, I have filled out all properties except the electrical data. I am running an isotropic study so I am not sure why is says orthotropic. Any ideas?

Cheers

[PipePakPat · Accepted solution]

From you description is seems as if you have edited the Material LIbrary Manager material entry, but not the material properties from within the analysis.

In the model tree, right-click on "Material" under part 1 and choose to edit the properties.  When the material property applicator appears (different than the material library manager), choose the "Edit Properties" button in the bottom left corner and ensure that you have at least two rows of temperature dependent material properties defined that bound the anticipated temperature range.  It is often advantageous to define a temperature range that is 15% lower and 15% higher than the applied model temperatures to compensate for fluctuations if the AMG iterative solver is selected.  Please let me know if you have further questions.

[Inv_kaos]

Hi Pat,

Yeah that was the problem, I didn't think I needed to override the material properties I had already filled out in the material library manager. However I can't think of any conceivable reason to want to refill out all the temperatures that I had already filled in when I spent considerable time adding 16 rows of data to my custom materials? I assume this is by design, can you explain why my materials all need to be [Customer Defined] instead of the library material? I mean thermal conductivity and specific heat all come through based on what I entered for that temperature so if I entered any other temperature next to these values it would no longer be valid..

Thanks for your assistance.

Stew

[PipePakPat]

Unfortunately, this issue exists in the 2013 software release.  It has been documented and forward to development.  The work-around is to define your material as a temperature dependent orthotropic material in the library, then use the corresponding temperature dependent orthotropic material model in the heat transfer analysis.  Please let me know if you have further questions.

[Inv_kaos]

Thanks Pat, good to know it wasn't just me.

[Inv_kaos]

Hi Pat,

I am getting this same error again on another simulation but this time I have the SP installed. I have checked my materials and all information is complete. I am running istropic temperature dependant material models. Is there anything else that can cause this error?

Cheers.

[Inv_kaos]

Are there still some bugs in the thermal materials and thermal simulation, I know a lot was fixed in the SP? I don't think it likes my custom materials but there are none in the library for me to check it against. The same materials have worked in the past. I can't get it to run with an orthotropic material model either.