Hi ,

I have set up a simple rectangular plate of 10 x 10 x 0.1 inches and with a circular hole in the center Diameter 3 inch.

Additionally, I have connected the perimeter with a set of Truss elements *ELEMENT,TYPE=T3D2 which share a common node (Vertex) .

The Vertex is at the center of the hole but slightly elevated in the Z direction 1 inch.

The rectangular plate is clamped on two sides and I’m pulling in the perpendicular direction to the plate with a force F=100lb applied to the Vertex.

The result shows that the truss elements aligned with the X direction do not release their Rotational DOFs as all the other ones have.

See Pictures.

Inp file attched