The scientific challenge

The FABEST HCF Competition is open to research groups, universities, laboratories, industrial partners and individual researchers working on fatigue modelling, multiaxial fatigue criteria, fatigue-life prediction and benchmark validation.

Participants are asked to submit blind fatigue-life predictions for 42CrMo4+QT steel specimens tested under high-cycle fatigue conditions. The blind target cases include plain and notched cylindrical specimens subjected to combined axial and torsional loading, including in-phase and 90° out-of-phase loading histories, with constant internal pressure.

The objective is to compare different fatigue-life prediction methods on the same well-characterised experimental basis and to assess their robustness under proportional and non-proportional multiaxial loading conditions.

Experimental database

Participants will receive a common experimental package including:

• specimen geometries and technical drawings;
• material information for 42CrMo4+QT steel;
• static tensile properties and fatigue calibration datasets (60 S-N curves and 1 Manson-Coffin curve);
• surface roughness measurements;
• hardness measurements;
• residual-stress information, when available;
• test setup and test-sequence documentation;
• public blind load matrix;
• Excel submission template;
• Word and LaTeX method-description templates.

All competition information and datasets will be made available on Zenodo as downloadable zipped folders.

Key information

Prizes and recognition

Research groups may participate in the competition; however, only one person per group can receive the prize.

Prizes will be awarded to the two best predictions:

• 1st place: funding for one-month Short-Term Scientific Mission (STSM) within FABER COST Action framework;
• 2nd place: free participation in the 2nd Annual FABER Conference 2027

Both first- and second-place contributors will also be invited to join as co-authors of the round-robin paper presenting the competition results, which will be published in a high-impact journal.

How to participate

1. Register for the competition, so that you can be updated whenever some new information is delivered.
2. Download the FABEST HCF Zenodo package.
3. Access the paper submitted to Data in Brief journal to document the data package of item 2.
4. Read the Start Here file and the Competition Rules including evaluation metrics.
5. Study the experimental basis, specimen geometries, load matrix and test-protocol documents.
6. Calibrate the fatigue model using the provided experimental data.
7. Complete the Excel prediction template.
8. Complete either the Word or LaTeX method-description template.
9. Submit the required files before the deadline of October 31.

Contacts

For questions about the HCF competition:

• Prof. Michaela Gkantou, [email protected],
• Dr. Jan Papuga, [email protected],
• Dr. Andrea Chiocca, [email protected]