Is there a DKT element with reduced integration available?

k_zurawski

Hi all, I'm looking for a QUAD4 element with one integration point. Is it available in Code_Aster v15.6+? ChatGPT told me about DKQ, but I can't find any information in the documentation. Please advise.

jeanpierreaubry

k_zurawski
hello
what is ChatGPT doing in this matter ?

k_zurawski

jeanpierreaubry actually a big mess in my head. But I treat it as initial "filter". Well, it's providing either outdated information, mixes info between versions of C_A or mixes info with other software.

AsterO'dactyle

k_zurawski

AsterO'dactyle thank you.

jeanpierreaubry

k_zurawski

as far as i understand code_aster jargon in the naming of the element
D means, i do not know, maybe Diagonal
K means Kirchoff law type of elements
T for a Triangle, Q for a quadrangle
if you assign DKT in MODELISATION and a QUAD element is encountered code_aster will keep going treating it as QUAD

k_zurawski

Thank you.

AsterO'dactyle

Sorry, I misunderstood the question, I was confused by ChatGpt and his stupid answer

For QUAD4 underintegrated, use D_PLAN_SI or C_PLAN_SI on QUAD4 cell geometry.

DKT/DKQ: Discrete Kirchhoff Triangle and DIscrete Kirchhoff Quadrangle are elements for plate theory developped by Jean-Louis Batoz in 80's.