Kampanat Cheng

Thank so much, but is there a way to apply force to an area like this

cause when I create the model by using the cross section command, the model will only be transparent model and I can't edit anything to the surface so I can't apply force as above picture.

The model will only look like this.

If there is no way, I will use the 3d solid model and just ignore the area where the stress is singularity.

Thank you sir.