Category Archives: Uncategorized

Fatlab 2.034 available. Now with anisotropy feature

A new version has just been released along with an associated example. This time, the main feature is the handling of anisotropic fatigue strength, as is needed in several cases, e.g. for additive manufacturing.

A relatively simple approach is taken, where the fatigue strength is scaled according to the surface angle of a given node relative to a user-defined reference direction, e.g. the direction of gravity during a print.

Video Tutorial

After many requests, I have now created a video tutorial showing how to get started using Fatlab. The video shows how to export the model and stress files from ANSYS and setup the analysis in Fatlab.

The video is on youtube. Use the high resolution to see what is going on. Hopefully more will follow and hopefully they will be better and without the annoying watermark.

Fatlab getting started tutorial.

Minor updates

Fatlab and the examples have been updated to accommodate for changes in Matlab 2018b and ANSYS 18.2.

In Matlab, the figure window has been changed due to the new zoom features (using the mouse wheel).

In ANSYS, the default format of text based stress output has been changed to include one more zero in the exponent.

Parallel execution option available

As mentioned, the standalone version will be discontinued and only the source will be provided for running under Matlab. This is because the deployed version behaved slightly different than the source version, and ran much slower. So, going forward, development will not be halted by limitations of the deploytool.

One of the limiting issues of the deployed version was in parallel execution of the code. It ran fine in Matlab, but not when deployed. So now this feature has been re-implemented, as of Fatlab 2.022. It uses the Parallel Computing Toolbox. Fatlab will detect whether the toolbox is installed and enable it accordingly. The user can then select a number of cores for the execution under Run Analysis.

Special thanks to Martin Dahl Kilt for helping with this feature and performance issues.