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A damage-based uniaxial fatigue life prediction method for metallic materials
Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, 08243 Manresa, Spain; CIEFMA – Department of Materials Science and Engineering, EEBE, Universitat Politècnica de Catalunya-BarcelonaTech, 08019 Barcelona, Spain.ORCID iD: 0000-0002-1401-6877
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials. Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, 08243 Manresa, Spain.ORCID iD: 0000-0003-4720-7888
Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, 08243 Manresa, Spain.
CIEFMA – Department of Materials Science and Engineering, EEBE, Universitat Politècnica de Catalunya-BarcelonaTech, 08019 Barcelona, Spain.
2023 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 231, article id 112056Article in journal (Refereed) Published
Abstract [en]

Determining the fatigue behaviour of metallic materials using standardised testing methods is costly and time-consuming. Therefore, several methods have been proposed to shorten the testing time and improve the fatigue optimisation of materials and components. This work presents a new fatigue testing method based on fatigue damage monitoring that allows determining the fatigue resistance in a short time and with few specimens. The presented method, named as the stiffness method, monitors the inelastic strains as an indicator of fatigue damage evolution. Strain measurements were carried out by digital image correlation techniques and showed to effectively follow damage evolution during fatigue tests. Results are convincing and more evident to obtain and discuss than other monitoring techniques, like temperature dissipation. In addition, the method overcomes the main limitations of the existing fast testing methods by avoiding the utilisation of complex apparatus, like infrared cameras or acoustic emission sensors. The approach has been validated in ten different metallic materials, as titanium and aluminium alloys, carbon steels, and stainless steels. The estimated fatigue limit was compared with values obtained following standardised tests, showing excellent agreement. Results allow pointing out the stiffness method as an efficient and effective tool for rapidly determining the fatigue behaviour of metallic materials.

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 231, article id 112056
Keywords [en]
Damage mechanics, Fatigue crack growth, Fatigue limit, Fatigue test methods
National Category
Applied Mechanics Other Materials Engineering
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-98896DOI: 10.1016/j.matdes.2023.112056ISI: 001054344600001Scopus ID: 2-s2.0-85161326279OAI: oai:DiVA.org:ltu-98896DiVA, id: diva2:1774863
Funder
EU, Horizon 2020, 101006844
Note

Validerad;2023;Nivå 2;2023-06-26 (hanlid);

Funder: Fatigue4Light project and the Ministerio de Ciencia e Innovación (PID2019-106631GBC41)

Available from: 2023-06-26 Created: 2023-06-26 Last updated: 2024-03-07Bibliographically approved

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Casellas, Daniel

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