# PyLabFEA: ML of yield functions with Abaqus and perhaps this year with calculix

**URL:** <https://calculix.discourse.group/t/pylabfea-ml-of-yield-functions-with-abaqus-and-perhaps-this-year-with-calculix/3876>\
**Category:** Tool interfaces\
**Created:** [April 12, 2026, 4:48pm UTC](https://calculix.discourse.group/t/pylabfea-ml-of-yield-functions-with-abaqus-and-perhaps-this-year-with-calculix/3876 "2026-04-12T16:48:49Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Stefano4000](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\
**Post date:** [April 12, 2026, 4:48pm UTC](https://calculix.discourse.group/t/pylabfea-ml-of-yield-functions-with-abaqus-and-perhaps-this-year-with-calculix/3876/1 "2026-04-12T16:48:49Z")

</div>

> **[pyLabFEA/examples/UMAT at master · AHartmaier/pyLabFEA](https://github.com/AHartmaier/pyLabFEA/tree/master/examples/UMAT)**
>
> master/examples/UMAT

PyLabFEA does have an example of machine learning of material yield functions.  
Isotropic and anisotropic examples are shown in a science article.

See

> **[GitHub - AHartmaier/pyLabFEA: Python Laboratory for Finite Element Analysis](https://github.com/AHartmaier/pyLabFEA)**
>
> Python Laboratory for Finite Element Analysis

Abaqus example with umat.

So calculix should be also possible. I made an issue.

> <https://github.com/AHartmaier/pyLabFEA/issues/13>
>
> Here Abaqus with umat is here in examples.
> 
> Is calculix also here possible?
> Calc…ulix is open source with abaqus syntax.
> But not all umat possibilities of abaqus are supported by calculix.
> 
> See www.calculix.de
> http://www.dhondt.de/cgx\_2.23.pdf
> Compatibility calculix to Abaqus 
> see in pdf page 657 and more

The developer will make an umat for calculix. It is a new point of his development list.