PSI - Issue 66

Ramdane Boukellif et al. / Procedia Structural Integrity 66 (2024) 55–70 Ramdane Boukellif et al. / Structural Integrity Procedia 00 (2025) 000 – 000

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Fig. 22. Schematic representation of the comparison between crack propagation in the test and the crack growth simulation: crack path prediction by the crack growth simulation (left); crack propagation during the test of (M50Nil) (right). 4. Conclusion In this work, the concept of 1 ′ -criteria is applied for the prediction of the crack path in the structure under rolling contact fatigue. Here, 2D-crack growth simulations were performed under LEFM assumptions. In the crack growth simulations, both the complex load situation and the measured residual stresses were taken into account. The residual stresses were modelled as thermal stresses. The results of the crack growth simulations showed good agreement with some results of the tests. Here, crack paths in the hollow shaft and in the outer ring were predicted and compared with the cracks that developed in the same parts. The prediction of the crack path after spalling in the outer ring agreed very well with the crack paths in the tests. In the future, these FE models could be extended to 3D and for even more complex geometries and stress fields. For more accurate results, accurate data for material properties and an accurate quantification of the residual stress The authors would like to thank the participating team from EASA and the project partners SKF Aerospace, IMKT from the University of Hannover, WUZ from University of Paderborn, the Central Research and Development of ZF AG and all colleagues from Airbus Helicopters Technik who took part during the time Project. The authors confirm that they, and/or their company or organization, hold copyright on all of the original material included in this paper. The authors also confirm that they have obtained permission, from the copyright holder of any third-party material included in this paper, to publish it as part of their paper. The authors confirm that they give permission, or have obtained permission from the copyright holder of this paper, for the publication and distribution of this paper as part of the crack path conference proceedings or as individual offprints from the proceedings and for inclusion in a freely accessible web-based repository. profile are required. Acknowledgements