PSI - Issue 75

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia (2025) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia (2025) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 75 (2025) 205–218

© 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Dr Fabien Lefebvre with at least 2 reviewers per paper Abstract For an overall state of traction (hydrostatic pressure > 0), it is clearly established that determining the lifetime of a mechanical part subjected to multiaxial stress states via a uniaxial fatigue estimation method (such as EN 1993-1- 9:2005) can lead to overestimating the lifetime of this part and therefore have a negative impact on safety. Carrying out a multiaxial fatigue calculation (Dang Van type criterion) is therefore more realistic but more costly in terms of time and know-how than a uniaxial fatigue calculation (EN 1993-1-9:2005 type). In practice, the safety components of cableways are subject to multiaxial stress state, but at what level of multiaxiality is it necessary to carry out a multiaxial fatigue lifetime calculation? To help the engineer decide which method to apply: we offer a simple tool based on reading charts, to quickly determine depending on the parameters of bi-axiality of the signal (  II /  I ) ratio, average stress over amplitude (  m /  R ), variation of loading angle (  ) the difference in lifetime between an estimation by Eurocode (N E ) or by Dang Van (N DV ). We then discuss acceptable N DV /N E lifetime variation values to be applied by the cableway sector profession for future standardisation work. © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2025 organizers Keywords: Type your keywords here, separated by semicolons ; Abstract For an overall state of traction (hydrostatic pressure > 0), it is clearly established that determining the lifetime of a mechanical part subjected to multiaxial stress states via a uniaxial fatigue estimation method (such as EN 1993-1- 9:2005) can lead to overestimating the lifetime of this part and therefore have a negative impact on safety. Carrying out a multiaxial fatigue calculation (Dang Van type criterion) is therefore more realistic but more costly in terms of time and know-how than a uniaxial fatigue calculation (EN 1993-1-9:2005 type). In practice, the safety components of cableways are subject to multiaxial stress state, but at what level of multiaxiality is it necessary to carry out a multiaxial fatigue lifetime calculation? To help the engineer decide which method to apply: we offer a simple tool based on reading charts, to quickly determine depending on the parameters of bi-axiality of the signal (  II /  I ) ratio, average stress over amplitude (  m /  R ), variation of loading angle (  ) the difference in lifetime between an estimation by Eurocode (N E ) or by Dang Van (N DV ). We then discuss acceptable N DV /N E lifetime variation values to be applied by the cableway sector profession for future standardisation work. © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2025 organizers Keywords: Type your keywords here, separated by semicolons ; Fatigue Design 2025 (FatDes 2025) Methodological tools for engineers: how to assess the relevance of using a uniaxial fatigue life assessment with Eurocode 3 or multiaxial fatigue life assessment with a Dang Van-type criterion? Application to mechanical parts of cableway installations. Benjamin Causse a *, Rémy Bernot a , Thomas Schmidt a,b,c , Françoise Fauvin b , Claudio Tonetta d , Thomas Bortolamedi e , Mathieu Weiss a and Eric Feulvarch b Fatigue Design 2025 (FatDes 2025) Methodological tools for engineers: how to assess the relevance of using a uniaxial fatigue life assessment with Eurocode 3 or multiaxial fatigue life assessment with a Dang Van-type criterion? Application to mechanical parts of cableway installations. Benjamin Causse a *, Rémy Bernot a , Thomas Schmidt a,b,c , Françoise Fauvin b , Claudio Tonetta d , Thomas Bortolamedi e , Mathieu Weiss a and Eric Feulvarch b a STRMTG, Domaine Universitaire de Grenoble - 1461 rue de la Piscine 38400 Saint-Martin d'Hères, France b Univ. Lyon, Ecole Centrale de Lyon, LTDS UMR 5513 CNRS, ENISE, 42023 Saint-Etienne cedex 02, France c CETIM, 7 Rue de la Presse, 42000 Saint-Étienne, France Etienne cedex 02, France d LEITNER, AG-S.p.A.,Brennerstr. 34 – Via Brennero, 34 - 39049 Sterzing - Vipiteno (BZ), Italy e LATIF, via Provina, 24 – 38123 Ravina (TN), Italy a STRMTG, Domaine Universitaire de Grenoble - 1461 rue de la Piscine 38400 Saint-Martin d'Hères, France b Univ. Lyon, Ecole Centrale de Lyon, LTDS UMR 5513 CNRS, ENISE, 42023 Saint-Etienne cedex 02, France c CETIM, 7 Rue de la Presse, 42000 Saint-Étienne, France Etienne cedex 02, France d LEITNER, AG-S.p.A.,Brennerstr. 34 – Via Brennero, 34 - 39049 Sterzing - Vipiteno (BZ), Italy e LATIF, via Provina, 24 – 38123 Ravina (TN), Italy

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2025 organizers 2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2025 organizers

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Dr Fabien Lefebvre with at least 2 reviewers per paper 10.1016/j.prostr.2025.11.023