FEM best practices and examples: Difference between revisions

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(Created page with " ===Mesh Size=== The mesh element used with in XFEM4U is a modified 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...")
 
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===Mesh Size===
===Mesh Size===
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.
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 05:01, 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.