Why not consider the pressure follower effect in DKT element

IamChinese

Hello everyone, I don't understand French, but I still read some of the help files with the help of translation software.
I have a question: why does DKT not have the function of pressure follower effect, which only needs to be considered within the theoretical framework of finite strain.
Coque-3D consumes too much resources (including human brainpower).
This is my first time posting here, nice to meet everyone. Wishing everyone a happy Spring Festival in advance!
祝大家春节快乐！

AsterO'dactyle

Hello,

Pressure follower effect exists on DKT. See ssls101m testcase for instance

IamChinese

AsterO'dactyle
Thank you! I got it!
Why didn't I see any relevant description in the help section? Is it a new feature? Where can I find the new features of the software every time it is updated? thank you!

IamChinese

AsterO'dactyle
I tested this case and unfortunately, pressure following is still not applicable to DKT element. It only does not report an error when the pressure value is 0, and indicating shows that DKT does not contain the matrix required for load following.
Pressure following requires consideration of an asymmetric matrix generated by this effect, and currently only coque-3D seems to take this effect into account.
I use code Aster to calculate pressure vessels, especially the latest version of ASME VIII-2 regarding buckling calculations. The new standard requires the calculation of post buckling behavior .DKT element are more user-friendly and 'suiv' is need be considered.

AsterO'dactyle

Hello,

Which version of code_aster ?

IamChinese

AsterO'dactyle
Version 16.5.0

AsterO'dactyle

Hello,

I get it.
Following a question on the forum in 2013, we have ensured that the code does not crash when a function follower pressure is requested on DKTs. However, this pressure is not calculated.
In fact, we require the function to be zero.

The functionality is therefore not available.

IamChinese

AsterO'dactyle
Why not consider adding this feature?

AsterO'dactyle

Hello,

No one has asked for it internally from our customers