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Title: Prediction of multiaxial fatigue life of notched maraging steel components manufactured by selective laser melting
Authors: Branco, R. 
Costa, J. D. 
Jesus, J. S. de 
Berto, F.
Ferreira, J. A. Martins 
Capela, C. 
Keywords: multiaxial fatigue; fatigue crack initiation; maraging steel; selective laser melting
Issue Date: 2022
Project: FEDER/FCT - UIDB/00285/2020 
Serial title, monograph or event: Procedia Structural Integrity
Volume: 39
Abstract: This paper aims at predicting the fatigue crack initiation life in maraging steel manufactured by selective laser melting under in-phase bending-torsion loading. Three relationships between the bending moment and the torsion moment were studied, namely B/T=2, B/T=1, and B/T=2/3. The tested geometries consisted of hollow cylindrical specimens with lateral holes. The crack initiation and the crack paths were detected in-situ using a high-resolution digital camera. The local stress-strain states at the notch region were accounted for using two alternative numerical models developed within linear-elastic frameworks: (1) a parametric structured mesh; and (2) an automatic unstructured mesh. Fatigue crack initiation sites and fatigue crack initiation lives were successfully predicted using both numerical models.
ISSN: 24523216
DOI: 10.1016/j.prostr.2022.03.097
Rights: openAccess
Appears in Collections:I&D CEMMPRE - Artigos em Revistas Internacionais

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