May 14, 2019


Base Tutorial. Topic. Finite Element Analysis. Level If the solver CalculiX is not installed see FEM Install. The following is the tutorial from : Calculix FEA Beam Part 1: Buliding Geometry and Meshing. This article is the first. Then presented as an alternative to the basic tutorial “Getting Started with Calculix” by Jeff.

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The standard shape functions for quadratic elements are very good. This leads to a larger variation in the results if you use linear elements.


A vda CAD interface is available. In addition the eigenfrequencies were calculated to determine possible resonances with the vanes. The compressor is made of casted aluminum alloy AlSi – C and the turbine of a high temperature alloy Inco C and both are loaded by pure centrifugal force.

If you include contact in your calculations and you are ttuorial quadratic elements, first avoid to include middle nodes in the slave surface. That way you get the expanded form of these elements in the. Both programs can be used independently. Despite this the quality of documentation and logic handled at the command causes the program is easily manageable, where skilled users might include their own functions. In CalculiX, slave middle nodes in contact formulations are internally connected to their neighboring vertex calxulix by means of multiple point constraints.

By Sebastian Rodriguez — valculix Mechanics] [1]. Furthermore, you get a feeling what the solution should look like. Static, dynamic and thermal solutions are available. Both programs can be used independently. CalculiX is a package designed to solve field problems. For a quick overview of the capabilities of Tuyorial the results of an investigation of a small jet engine are presented.


FEM CalculiX Cantilever 3D – FreeCAD Documentation

Since CalculiX uses the standard shape functions for linear elements too, the results must be considered with care. Static, dynamic and thermal solutions are available. Contact information can be found at the bottom of the “Download” page. The models are meshed calvulix 20 noded brick elements with reduced integration. This futorial in very high speed if a hardware-accelerated openGL-library is available and still high speed for software-rendering MesaGL.

This program uses the openGL library for visualization and the glut library for window management and event handling. The solver is able to do linear and non-linear calculations.

Advanced CalculiX Tutorial

This kind calcuulix cases of study are specially complex and requires much more technological resources due to the nonlinearity characteristics of the case, where a slight change on the geometry, mesh or frontier conditions overcome on a totally different behavior.

Therefore it must know the name and syntax of each command, or at least constant consultation of the user manual.

Click HERE for the jet-engine-model and documentation. Views Read View source View history.

Most finite element programs use these standard functions. If the former is incorrect, so will the latter be. Therefore, most finite element programs modify the standard shape functions for linear elements to alleviate these problems.

The CalculiX package was developed by a team of enthusiasts in their raw spare time. In some problems you can save memory by choosing an iterative solution method.

Advanced CalculiX Tutorial | Libre Mechanics

The solver is able to do linear and non-linear calculations. The right and left side of the disks are connected by cyclic symmetry equations which allow to calculate eigenvalues and mode-shapes for certain nodal diameters of a rotational symmetric volume based only on a segment of the structure. Because the solver makes use of the abaqus input format it is possible to use commercial pre-processors as well.


The method used is the finite element method. The FE-model was build from scratch with CalculiX and the compressor- and turbine models together with solver input files can be found in the distribution. Check the quality of your mesh in CalculiX GraphiX or by using any other good preprocessor. Error message Deprecated function: For this precise tutorial it will be assumed that the user its already familiar with the working environment of CalculiX CCX and CGX modules, if this is not the case it is recommendable to refer first to some beginner tutorial for example: This tutorial is intended as a reference or starting point for those who choose to use more high-performance software and control.

Only a subset of commands which are most important for post-processing is also available through a pop-up menu.

According to my experience, the following guidelines are quite helpful:. You can easily verify whether the thicknesses you specified are correct. Please keep in mind that any file may vary from user to user by the meshing and computational conditions, but it does not meaning this difference will represent an error of processing.

Click HERE to see the example of the turbo-charger compressor. As the user is probably aware by now, the document make a number of simplifying assumptions as the tutorial progressed, this is done in the interest of gaining a clearer understanding of these fundamental without getting bogged down in special details and exceptions.

Click HERE to see the example of the turbo-charger turbine. However, adhering to a couple of simple rules can make life a lot easier.