This article was translated by Google Translator View original text

Have I selected the correct FE mesh size?

Answer

Unfortunately, it is not possible to give a general answer to the question whether a system is sufficiently discretized. When calculating with Finite Elements, the general rule is that the calculated deformations and stresses no longer deviate from the analytical solution. The goal is to find out the optimal number of FE elements at which the stresses no longer change.

Consequently, the user should select the discretization as fine as necessary and as roughly as possible. The general rule is that you always have to select at least 3 FE elements by height for holes or breakthroughs in the structure.

How singularities are handled at reentrant corners, etc. is described in the following FAQ .

Based on the figures in this article, it is easy to see that, given the insufficient discretization of the system, the geometric intersections of the structure are hardly covered and the system thus approximates to a bending beam. Meaningful design is thus not possible.

Keywords

Discretization FE mesh size Singularities

Contact us

Contact to Dlubal

Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

+49 9673 9203 0

info@dlubal.com

RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD