Contrib:KeesWouters/prestressmodal
Contents
Buckling behaviour of a beam
To start with, this contribution mainly focuses on the use of Salome and Code Aster, not on the results and the mechanical justifications of the code that has been used. So no garantees that the results will be correct upto the fifth decimal place, which they are not. I do hope though that this information is useful. For me it has been, because I had to think about some commands and look through the documentation and learn from that. In case of mistakes, errors and the like, please notify me, or better, you are invited to correct them yourself. Enjoy.
Defining the properties of the cylinder
Geometry of the cylinder
The construction is readily defined in the Geometry module of Salome by Cylinder, radius 0.5 and length 50 mm, at the origin of the coordinate system. The axial direction of the beam coincides with the global z axis. The two axial faces of the beam are denoted by 'bot' and 'top', used to apply boundary conditions and loads.
Beam with solid elements
The mesh is generated by NetGen. The choosen algorithm is tetrahedron (NetGen), NetGen 1D 2D 3D. The applied hypothysis are: Maximum volume 0.25, maximum size 0.125. Second order elements are generated, finess is moderate, and optimize is set. A face group is generated for top and bot. The boundary conditions will be dx=dy=dz=0 at the 'bot' and dx=dy=0, dz=-0.2 mm at 'top', see command file for this further on.
Material properties of the beam
The beam consists of steel. The material properties are as given above.
