FEM best practices and examples: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
===Mesh Size=== | ===Mesh Size=== | ||
The mesh element used with in XFEM4U is a modified [https://en.wikipedia.org/wiki/Bending_of_plates | The mesh element used with in XFEM4U is a modified [https://en.wikipedia.org/wiki/Bending_of_plates Kirchhoff] element. It is extended in 2021 by [https://nl.wikipedia.org/wiki/Johan_Blaauwendraad | Professor Blaauwendraad]. Usually Kirchhoff is less precise regarding shearforce distribution. In the modified element this is solved. | ||
Below we describe a method how to find the right mesh size for your structure. If you make the mesh too dense, internal forces will be higher then reality. First some basics. | Below we describe a method how to find the right mesh size for your structure. If you make the mesh too dense, internal forces will be higher then reality. First some basics. | ||
Revision as of 06:33, 25 August 2022
Mesh Size
The mesh element used with in XFEM4U is a modified Kirchhoff element. It is extended in 2021 by | Professor Blaauwendraad. Usually Kirchhoff is less precise regarding shearforce distribution. In the modified element this is solved.
Below we describe a method how to find the right mesh size for your structure. If you make the mesh too dense, internal forces will be higher then reality. First some basics.
- Element size should never be smaller then the plate thickness. Otherwise the theory of Kirchhoff is not correct anymore.
- Element size also at least the smallest spansize in the structure to expect a correct result.
- Steel plate structures: If you make you mesh 50% smaller the stress should not increate more then 10-12%.
Workflow to find the right meshsize within a steel structure.