PSI - Issue 38

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000

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

ScienceDirect

Procedia Structural Integrity 38 (2022) 141–148

© 2021 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 2021 Organizers © 2021 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 2021 Organizers Abstract D s ite the c ntinuou progress in t e additive manufacturing (AM) t chnologies to improve the quality f the produc d parts, the pr sence of defects induce by the process rem ins a critical issue for the de ign f industrial components with respect to atigu amag . Analytical m dels such a Kitagawa diagrams represent easy o use tools to p edict fa igue strengt accounting for the detrimen al inf ence of t defects. Th y are therefore of great interest from an i dustrial point of view. Th aim of the present work is to evaluate whether rtificial fects obtained by placing hole directly into the CAD files of fatigue specimens can be used to stablish Kitagawa diagrams, d spite some differences in terms of shapes and morphologies between the natural and artifici defects. Two artificial defect geometries with a similar ize were studied. For ea h of these geom tries, the experimen al fatigue strengt s and the real sizes of the critical defec s measured from the fracture surfaces were used to determine th arameters of the El-Haddad model. For one of the geom tries, the btained model as able to predict t strength corre ponding to the natural def cts, an th associated parameters were found consistent with the literature. The fatigue tests results also highlighted the influence of the defect shape. © 2021 The Authors. Published by ELSEVIER B.V. This is an open acces article under CC BY-NC-ND lic nse (https://creativecommons.org/l c nses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Contribution of the introduction of artificial defects by additive manufacturing to the determination of the Kitagawa diagram of Al Si alloys M. Bonneric a, *, C. Brugger a , N. Saintier a , A. Castro Moreno b , B. Tranchand b a Arts et Métiers Institute of Technology, University of Bordeaux, CNRS, Bordeaux INP, INRAE, HESAM Université, I2M, Esplanade des Arts et Métiers, 33400 Talence, FRANCE b IRT Saint-Exupery, 3 rue Tarfaya, 31400 Toulouse, FRANCE Abstract Despite the continuous progress in the additive manufacturing (AM) technologies to improve the quality of the produced parts, the presence of defects induced by the process remains a critical issue for the design of industrial components with respect to fatigue damage. Analytical models such as Kitagawa diagrams represent easy to use tools to predict fatigue strength accounting for the detrimental influence of the defects. They are therefore of great interest from an industrial point of view. The aim of the present work is to evaluate whether artificial defects obtained by placing holes directly into the CAD files of fatigue specimens can be used to establish Kitagawa diagrams, despite some differences in terms of shapes and morphologies between the natural and artificial defects. Two artificial defect geometries with a similar size were studied. For each of these geometries, the experimental fatigue strengths and the real sizes of the critical defects measured from the fracture surfaces were used to determine the parameters of the El-Haddad model. For one of the geometries, the obtained model was able to predict the fatigue strength corresponding to the natural defects, and the associated parameters were found consistent with the literature. The fatigue tests results also highlighted the influence of the defect shape. FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Contribution of the introduction of artificial defects by additive manufacturing to the determination of the Kitagawa diagram of Al Si alloys M. Bonneric a, *, C. Brugger a , N. Saintier a , A. Castro Moreno b , B. Tranchand b a Arts et Métiers Institute of Technology, University of Bordeaux, CNRS, Bordeaux INP, INRAE, HESAM Université, I2M, Esplanade des Arts et Métiers, 33400 Talence, FRANCE b IRT Saint-Exupery, 3 rue Tarfaya, 31400 Toulouse, FRANCE

* Corresponding author. E-mail address: matthieu.bonneric@ensam.eu * Corresponding author. E-mail address: matthieu.bonneric@ensam.eu

2452-3216 © 2021 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 2021 Organizers 2452-3216 © 2021 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 2021 Organizers

2452-3216 © 2021 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 2021 Organizers 10.1016/j.prostr.2022.03.015