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.
Regards,
Peter.
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