1. A damage-based uniaxial fatigue life prediction method for metallic materials
- Author
-
Sergi Parareda, Daniel Casellas, Marc Mares, Antonio Mateo, Universitat Politècnica de Catalunya. Doctorat en Ciència i Enginyeria dels Materials, Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, and Universitat Politècnica de Catalunya. CIEFMA-PROCOMAME - Disseny Microestructural i Fabricació Avançada de Materials more...
- Subjects
Materials--Fatiga ,Fatigue limit ,Annan materialteknik ,Applied Mechanics ,Teknisk mekanik ,Materials--Fatigue ,Damage mechanics ,Enginyeria dels materials::Assaig de materials::Assaig de fatiga [Àrees temàtiques de la UPC] ,Fatigue test methods ,Other Materials Engineering ,Fatigue crack growth - Abstract
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. Validerad;2023;Nivå 2;2023-06-26 (hanlid);Funder: Fatigue4Light project and the Ministerio de Ciencia e Innovación (PID2019-106631GBC41) more...
- Published
- 2023