Learning Forum

[javat33489]

Hi all.

 I use these units:

When adding the THERMAL_ISOTROPIC card, you must enter the parameters HC and TC.

In what units should I do this, taking into account my units?

I have the following data:

For degrees I will use Celsius. And in what units will I use HC in TC?

[javat33489]

It seems I figured out the data based on mm and kg:

But I still get the error

[Ashish Khemka]

Hi,

 

It looks that you found a solution.

 

Regards,

Ashish Khemka

[javat33489]

No, I have an error and the solution stops:

[javat33489]

Tell me which cards should I show you? I would like to solve this error.

[javat33489]

Help please

[Ashish Khemka]

Hi,

Please wait for the members to comment.

Regards,

Ashish Khemka

[javat33489]

I really need your help. Tell me which cards to show, I’ll make screenshots. I'm desperate.

[Armin]

Hi Javat,

I have a question regarding your model: Does this error occur due to the *MAT_THERMAL_ISOTROPIC card that is used to define material thermal properties? It might be relevant to other cards utilized for the thermal-structural simulation.

[javat33489]

I use cards:

MAT_THERMAL_ISOTROPIC

INITIAL_TEMPERATURE_SET

CONTROL_THERMAL_TIMESTEP

CONTROL_THERMAL_SOLVER

CONTROL_SOLUTION = 2

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Whatever parameters I use in MAT_THERMAL_ISOTROPIC there is always an error. I'll try to turn off these cards and run the calculation. Then I will turn them off sequentially to understand where the error is. Thanks for the advice. I'll write what the result is.

[javat33489]

Hello.

I tried different options but the error still appears.

I did some tests. I'll tell you more.

I'm using calculation time 7.5.

The drill material is plastic kinematic, the material is SPG sand MOHR_COULUMB.

I wrote above which units I use.

I manage to make the first entry in d3plot, but at the next step an error occurs.

I changed the timestep parameters of the temperature solver and the HC and TC parameters in the MAT_THERMAL_ISOTROPIC settings (for drill and sand).

1. 

With these settings, the sand temperature is noticeably very high:

 

2.

With these settings there are generally negative temperatures

 

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Where to go next? What to watch or configure? Please tell me?