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Re: Bounding Cam Clay Model
Posted: Fri Oct 18, 2024 7:50 am
by STKO Team
Therefore, the elastic analysis stage is only to obtain the initial ground stress. In this process, the performance of the soil does not change, because the parameters set by the soil are determined under this stress condition. The properties of soil will only change under the action of additional loads. In order to reflect the influence of external loads, it is necessary to activate the plastic phase. I don't know if I can interpret it that wa
It's correct
Re: Bounding Cam Clay Model
Posted: Sat Oct 19, 2024 9:30 am
by Lei Lei
Thanks, this gives me a deeper understanding of the use of this constitutive model.
Best wishes!
Re: Bounding Cam Clay Model
Posted: Mon Oct 21, 2024 8:25 am
by STKO Team
You're welcome
Re: Bounding Cam Clay Model
Posted: Tue Oct 22, 2024 2:01 pm
by Lei Lei
Dear STKOteam,
It's so weird!
I made a reloading cell test with a 1m×1m size， it worked well.
However, when I changed its' size to 200m×100m, it couldn't converge.
The two models have no difference except for the model size.
Could you help find out where the problem is?
Looking forward to your reply!
Re: Bounding Cam Clay Model
Posted: Wed Oct 23, 2024 10:52 am
by STKO Team
Can you try with a coarser mesh?
When you have a very fine mesh, you should increase the tolerance in the test command, because it's a norm of a vector of errors! (If all DOFs have a small error, the norm will be larger as the number of DOFs increase)
Re: Bounding Cam Clay Model
Posted: Thu Oct 24, 2024 5:26 am
by Lei Lei
Yes, it works for a simple model.
However, for a relatively complex model, the BCC's convergence ability seems poor.
I've tried to change the test tolerance, gird size, and steps with the most robust Newton algorithm, even for the first elastic stage.
Re: Bounding Cam Clay Model
Posted: Thu Oct 24, 2024 10:23 am
by STKO Team
The InitialStateAnalysisWrapper does not support the "materialState" keyword for parameters!
- InitWrapBCC.png (99.94 KiB) Viewed 803 times
Re: Bounding Cam Clay Model
Posted: Thu Oct 24, 2024 10:49 am
by Lei Lei
STKO Team wrote: ↑Thu Oct 24, 2024 10:23 am
The InitialStateAnalysisWrapper does not support the "materialState" keyword for parameters!
The BoundingCamCly material needs "materialState" to enter the plastic stage.
Is there another method to conduct the initial analysis with BoundingCamCly material?
Re: Bounding Cam Clay Model
Posted: Fri Oct 25, 2024 8:18 am
by STKO Team
The initialStateAnalsysis is only useful when you are doing stage analysis and you want to reset the initial displacement to zero while keeping the initial stress.
Anyway it's not mandatory, just don't use it.
If you want to build other pieces of solids like in a construction stage there are other ways to do it without the initalStateAnalysis Wrapper
Re: Bounding Cam Clay Model
Posted: Fri Oct 25, 2024 8:38 am
by Lei Lei
STKO Team wrote: ↑Fri Oct 25, 2024 8:18 am
The initialStateAnalsysis is only useful when you are doing stage analysis and you want to reset the initial displacement to zero while keeping the initial stress.
Actually, this is exactly the functionality I need. Is there any way to accomplish this?