Hello Mehmet,
It is a general guideline to use at least three elements through the thickness of solids. It is to correctly depict the stress through the thickness of a thin body under a bending load, which results in a substantial gradient through the thickness. When using shells, you only need one element on the surface of a body with an allotted thickness because shell elements have internal equations that appropriately compute the stress across the thickness when the element is carrying a bending force.
To get a better understanding of analyzing thin structures efficiently, have a look at this Ansys Innovation Course:
Geometry Representation - ANSYS Innovation Courses
Regards,
Nanda.
Guidelines for Posting on Ansys Learning Forum
How to access ANSYS help links
You are navigating away from the AIS Discovery experience