Since there have been some fixes in FemWB lately here is a simple cantilever beam to prove the FemWB is useble allready.

Since FemWB uses CalculiX to calculate displacements the first example of CalculiX manual is choosen.

- http://web.mit.edu/calculix_v2.7/Calcul ... node7.html

or the whole pdf (http://www.dhondt.de/cgx_2.8.pdf)

Geometry:

a box

l = 8.0 m

w = 1.0 m

h = 1.0 m

The start section (face) of the beam is fixed and the end section of the beam is loaded by 9.0 MN which makes it a usual cantilever beam.

material is steel:

young's modulus = 210000 Mpa

poisons ratio = 0.3

displacement formula (beam theory)

f = (F x l^3) / (3 x E x I) = ( 9 x 8^3 ) / ((3 x 210000 x ((1x1^3)/12)) = (12x9x8^3) / (3x210000) = 0.0877 m = 87.7 mm

The mesh was generated by Netgen (10-node-tetrahedron, max size = 750mm)

Max Displacement in FreeCAD is 85.1 mm which is only 3 % difference to the beam theory.

Current Limitations of CalculiX run:

- one mesh object

- one fixed object (only faces)

- one force object (only faces, force in N is distributed on all nodes of the given faces)

- one material object

- output

- since input is in mm, N and N/mm2 output will be in these units too.

OS: Debian GNU/Linux 8.0 (jessie)

Word size of OS: 64-bit

Word size of FreeCAD: 64-bit

Version: 0.15.4660 (Git)

Branch: femunits

Hash: a0892a9c5637d843b72decf0ece8a01209ae5cb6

Python version: 2.7.8

Qt version: 4.8.6

Coin version: 4.0.0a

OCC version: 6.7.0

Screen:
File:
EDIT: File which runs on FreeCAD 0.16.5231