why there is no drilling stiffness in QUAD4?
why there is no drilling stiffness in QUAD4?
(OP)
I have been using Nastran for many years and know that there is no rotational stiffness about its normal axis to it when using QUAD element(I know QUADR has drilling stiffness). Would anyone please tell me what is a theoretical reason why a rotational stiffness is not involed in traditional shell formulation? I have read some FEM books about this but none of them cleary say this reason. I am talking about linear physics only.





RE: why there is no drilling stiffness in QUAD4?
However, when this shell theory is applied to FEA, this mode becomes relevant and must be addressed (or the dof must be omitted).
Brad
RE: why there is no drilling stiffness in QUAD4?