2D beam element - stiffness matrix


I would like to model a 2D beam element with 3 DOF in each node (horizontal and vertical displacement and rotation). My model consists of 1 element and 2 nodes.

Ansys seems to model the beam element in 3D with 6 DOF in each node as seen by the 12by12 stiffness matrix as attached (Ansys stiffness matrix).


Can you help me to model the beam in 2D so that the stiffness matrix is a 6by6 stiffness matrix as shown in the picture attached (2D element stiffness matrix)?

Best regards,



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