Hello Thanhttdt,

You have applied different loads to the two models.

On the Solid Model, you have a bearing load, which takes the force and applies it to the nodes only on the side of the face that a pin in the hole would push on, and with the force scaled as a cosine function with 1 on the centerline ramping down to 0 at the 90 degree point of the face.

On the Shell Model, you have a force load, which takes the force and divides it equally to all nodes around the circle.

Try putting a force load on the solid model and it will be closer. However, the bearing load is a more realistic load for your case.