PSI - Issue 42

ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 42 (2022) 1545–1551

© 2022 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 23 European Conference on Fracture – ECF23 Abstract The fatigue limit stress prediction models make it possible to determine the durability of metals, considering experimental fatigue tests, mechanical properties, hardness, manufacturing technology (namely through intrinsic defects in the process), and empirical constants depending on the manufacturing processes and components’ dimension. The manufacturing defects in the materials lead to failures at much lower applied stresses. Therefore, considering such defect features as input parameters in fatigue limit assessment is of primary importance. This work aims to develop fatigue life prediction models for extruded 6060 aluminium. The methodology used in this study is based on experimental work. The materials used were obtained from three extruded pieces of 6060 aluminium with different geometries (a rectangular section with smooth faces and recess faces and a solid rectangular section) and different thermal treatments (T1 and T4). In addition, the manufacturing defects of the stress concentration zones were studied. The algorithm to predict durability is based on the experimental results obtained. The Murakami , Ueno and Schӧnbauer models were studied. In conclusion, new models to predict fatigue limits were developed for the 6060-aluminium extruded alloy, considering different geometries and heat treatment. 23 European Conference on Fracture - ECF23 Fatigue Limit Prediction Models of 6060 Aluminium Extruded Alloy Teresa Morgado a,b,c,d *, Diogo Paulo b , Alexandre Velhinho e , Mário Pereira f , António Mourão b,d a Lisbon School of Engineering of Instituto Politécnico de Lisboa, Rua Conselheiro Emilio Navarro 1, 1959-007 Lisboa, Portugal b Research and Development Unit for Mechanical and Industrial Engineering & Department of Mechanical and Industrial Engineering of NOVA School of Science and Technology of Universidade NOVA de Lisboa, Campus da FCT/UNL 2829-516 Caparica, Portugal c Navy Research Center, Alfeite, 2810-001 Almada, Portugal d Intelligent Systems Associate Laboratory, 4800-058 Guimarães, Portugal e Materials Research Centre/ Institute for Nanostructures, Nanomodelling and Nanofabrication & Department of Materials Engineering of Universidade NOVA de Lisboa, Campus da FCT/UNL 2829-516 Caparica, Portugal f Centre for Rapid and Sustainable Product Development & School of Technology and Management of Instituto Politécnico de Leiria, Campus 2, 2411-901 Leiria; Portugal Abstract The fatigue limit stress prediction models make it possible to determine the durability of metals, considering experimental fatigue tests, mechanical properties, hardness, manufacturing technology (namely through intrinsic defects in the process), and empirical constants depending on the manufacturing processes and components’ dimension. The manufacturing defects in the materials lead to failures at much lower applied stresses. Therefore, considering such defect features as input parameters in fatigue limit assessment is of primary importance. This work aims to develop fatigue life prediction models for extruded 6060 aluminium. The methodology used in this study is based on experimental work. The materials used were obtained from three extruded pieces of 6060 aluminium with different geometries (a rectangular section with s ooth faces and recess faces and a solid rectangular section) and different thermal treatments (T1 and T4). In addition, the manufacturing defects of the stress concentration zones were studied. The algorithm to predict durability is based on the experimental results obtained. The Murakami , Ueno and Schӧnbauer models were studied. In conclusion, new models to predict fatigue limits were developed for the 6060-aluminium extruded alloy, considering different geometries and heat treatment. 23 European Conference on Fracture - ECF23 Fatigue Limit Prediction Models of 6060 Aluminium Extruded Alloy Teresa Morgado a,b,c,d *, Diogo Paulo b , Alexandre Velhinho e , Mário Pereira f , António Mourão b,d a Lisbon School of Engineering of Instituto Politécnico de Lisboa, Rua Conselheiro Emilio Navarro 1, 1959-007 Lisboa, Portugal b Research and Development Unit for Mechanical and Industrial Engineering & Department of Mechanical and Industrial Engineering of NOVA School of Science and Technology of Universidade NOVA de Lisboa, Campus da FCT/UNL 2829-516 Caparica, Portugal c Navy Research Center, Alfeite, 2810-001 Almada, Portugal d Intelligent Systems Associate Laboratory, 4800-058 Guimarães, Portugal e Materials Research Centre/ Institute for Nanostructures, Nanomodelling and Nanofabrication & Department of Materials Engineering of Universidade NOVA de Lisboa, Campus da FCT/UNL 2829-516 Caparica, Portugal f Centre for Rapid and Sustainable Product Development & School of Technology and Management of Instituto Politécnico de Leiria, Campus 2, 2411-901 Leiria; Portugal

* Corresponding author. Tel.: +0-351-939824712. E-mail address: t.morgado@fct.unl.pt * Corresponding author. Tel.: +0-351-939824712. E-mail address: t.morgado@fct.unl.pt

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23

2452-3216 © 2022 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 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.195