Roland's homepage

My random knot in the Web

Articles tagged with "Calculix"

  1. Folded leaf spring ball joint flexure

    The Dutch-language engineering book “Constructieprincipes” by M.P. Koster contains flexure made out of four folded leaf springs that kind of acts like a ball joint.

    The point where the load is applied should rotate around a virtual center formed by the point where the fold lines meet. The goal of this article is to simulate that and see if it works.

  2. Corrugation against buckling

    Composite sandwich products loaded in bending tend to fail by buckling of the laminate under compression. The author’s intuition is that corrugating the surface under compression should help. So the question is; does it help, and how much. That is what will be investigated in this article.

  3. Hex versus tet meshes in FEA

    In this article the difference in the images of the stresses between a quadrilateral hexahedron (“hex”) mesh and a tetraeder (“tet”) mesh will be investigated. In both cases, second order elements will be used.

    Hopefully this will make it clear to the reader why hex meshes are generally preferred.

    The plate with a hole that was the subject of a previous article will again be used. The analyses will be done using CalculiX.

  4. Patching CalculiX Graphics to fix flipped screen hardcopy

    Since some time, I’ve had the problem that generating hardcopy images from cgx doesn’t work properly; the pictures are inverted vertically.

    At first, I thought this might have been a change in cgx. But comparing the source code for cgx.c for 2.16 up to and including 2.19, I don’t see anything that would explain it.

  5. Automating CalculiX with make(1)

    The make program is a staple UNIX development tool. In this article I will show how it can be used to automate and simplify the usage of CalculiX.

    My CalculiX projects are all kept in their own directories. In each of those directories there exists a Makefile. This contains instructions for the make program.

    By default, invoking make in this directory runs the pre-processor and the solver. But there are also specific sub-commands, for example:

    • “make mesh” shows the mesh used in the FEA.
    • “make disp” shows the deformed product in the post-processor.
    • “make stress” shows the stresses in the product in the post-processor.

Page 1 / 2 Page 2 →