Abaqus Problem

[aliasgere]

I have created a 3D model of 2 solid parts and 1 shell part. I created mesh sets for the 2 solid parts but when I apply initial stress conditions using the input file, the following error is displayed on the .dat file when I run the input file:

AN INITIAL CONDITION HAS BEEN SPECIFIED ON ELEMENT 0 BUT THIS ELEMENT HAS NOT BEEN DEFINED

What does this mean since I do not have Element 0 in my model?

Your help will be appreciated.

 

[Geotech2011]

Hi,
Would you please let me know what did you type in input file in order to define the initial condition.

 

[aliasgere]

*Initial Conditions, Type=Stress, Geostatic
Soil,0,35,-630000,0,1.0,1.0
*Initial Conditions, Type=Stress, Geostatic
Plug,0,35,-360000,15,1.0,1.0

 

[Geotech2011]

Your definition for Initial condition seems right. you can check your defining for element set. Additionally, you can remove one of your initial condition and then see what's happen to find out which element set make this error.

 

[aliasgere]

Thanks I will try that and let you know what happens.

 

[aliasgere]

Just tried and it runs when I remove the initial condition for the plug so must be to do with that.

 

[Geotech2011]

Yes definitely. Could you let me know what's the material of plug?

 

[aliasgere]

soft clay (same properties as that of the surrounding soil but separated by the pile).

 

[Geotech2011]

Have you selected any other material element as a plug element? Be careful that as far as I know you can just define stress initial condition for soil.

 

[aliasgere]

No used the same solid elements as the soil and used the same properties.

 

[Geotech2011]

Have you checked your plug element set? or re-define plug element set. may be it could be helpful. I modelled some models similar your model by axisymmetric and I did not have this problem.

 

[aliasgere]

did u apply initial stress condition to your plug soil?

 

[Geotech2011]

I did not define two soil material properties, so I just define one stress initial condition.

 

[aliasgere]

I also have one material property (clay) for both soil and plug. Does this mean I do not need to define an initial stress condition for the plug even though the mesh set for my soil does not include the plug.

 

[Geotech2011]

You can edit your soil set and add those plug elements which you want to assign stress initial condition for it.

 

[aliasgere]

I edited my soil set to include the soil plug and it works! Thanks for your assistance.

Do you have experience in using shell elements?

 

[Geotech2011]

Unfortunately I do not have any experience regarding shell element. Good luck.

 

[aliasgere]

Thanks!