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[Asif Haq]

I running a simulation in transient thermal. I have input temperature dependent thermal conductivity for steel 1010. I am given the following error. The following image is the property that I used. How can I get around this issue. 

*** WARNING ***                         CP =       1.547   TIME= 17:00:34

 Using 1 iteration per substep may result in unconverged solutions for   

 nonlinear analysis and the program may not indicate divergence in this  

 case.  Check your results.                                              

 

 *** WARNING ***                         CP =       1.547   TIME= 17:00:34

 Temperature-dependent properties have not been specified.  The          

 THOPT,QUASI option does not perform equilibrium iterations.  Small      

 time steps may be required to obtain accurate results.                  

 

 *** WARNING ***                         CP =       2.359   TIME= 17:00:34

 Element shape checking is currently inactive.  Issue SHPP,ON or         

 SHPP,WARN to reactivate, if desired.                                    

 

 *** WARNING ***                         CP =       2.812   TIME= 17:00:34

 Material number 17 (used by element 98218) should normally have at      

 least one MP or one TB type command associated with it.  Output of      

 energy by material may not be available.                                

 

 

 

[Aniket]

Hi, These are warnings, not errors, does your other material have temperature-dependent conductivity as well? The warning could be due to other material.

-Aniket

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[Asif Haq]

 

I am exporting ohmic losses into transisent thermal. That does not have any temperature dependent proporties. I am only interested to look at the object that i am heating. 

In transient thermal, there is only 1 material. that is steel 1010. The simulation does not complete either. 

 

[Aniket]

two things:

1. try deleting the stainless steel defined in the Engineering data
2. refresh cells B4 and B5 before solving again.

You mentioned that the solution doesn't complete, are there any other errors in solver output?

-Aniket

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[Asif Haq]

I have deleted all the information and started the material from scratch. I have input thermal conductivity , young modulus, poissons ratio, and density upto 1600c. WELL IT DID RUN BUT THE THE FINAL TEMPERATURE OUTPUT WAS 9000 degree C. 

SO i deleted it again and only input thermal conductivity and limited it to 1000 degree C. I have results now. I guess Ansys cant handle temp dependent data above 1000 degree or i might be missing something fairly obvious. 

[Aniket]

I don't think there's any limit for data in the material. Have you checked the mesh and ITS are as per the required guidelines mentioned here under "Number of substeps per load step, or the time step size":

https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v231/en/ans_the/Hlp_G_THE3_5.html

-Aniket

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