PSI - Issue 75

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 75 (2025) 392–418

Fatigue Design 2025 (FatDes 2025)

© 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 Analyses include finite element models to evaluate critical areas and stress distribution. Experimental tests on reduced scale prototypes were conducted to validate numerical predictions. These tests utilized strain gauges and acoustic emission sensors to detect crack initiation and propagation. The results demonstrate that normative approaches, such as (API 16F, 2022) and (DNV GL RP C203, 2020), for fatigue calculations tend to be either overly conservative or inadequate. In contrast, the proposed methodology, which incorporates multiaxial stress considerations, material non linearity, and mean stress correction, provides a more realistic prediction. The tests confirmed the robustness of 10CrMo9-10 alloy material under severe dynamic conditions, showing that the product far exceeds normal operational scenarios. In conclusion, the document highlights the design improvements, advanced fatigue calculation methodologies, and excellent performance of the product during the dynamic tests. © 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 Abstract The document outlines the evolution of the Clip-Riser ® product, a connector initially designed for deep-water drilling operations. A new generation of the Clip-Riser improves upon its predecessor by offering increased load capacities, easier inspection, and enhanced fatigue resistance through specific materials and structural innovations. Towards a better assessment of Clip-connector fatigue thanks to an improved design methodology and the use of acoustic emission Fabrice Deleau a *, Emmanuel Persent a , Guillaume Coudouel a , Guillaume Perrin b a IFP Energies nouvelles, 1-4 avenue de Bois-Préau 92852 Rueil-Malmaison Cedex, France b Institut de Soudure Industrie, Parc technologique des Rives de l'Oise, Rue les Rives de l'Oise, 60280 Venette, France

* Corresponding author. Tel.: +33 4 37 70 33 06. E-mail address: fabrice.deleau@ifpen.fr

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.2025.11.040