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Have I selected the correct FE mesh size?


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.


Discretization FE mesh size Singularities

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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

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