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Prediction of multiaxial fatigue life of notched maraging steel components manufactured by selective laser melting
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| 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. | 615.32 KB | Adobe PDF |
Orientador(es)
Resumo(s)
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.
Descrição
Palavras-chave
multiaxial fatigue fatigue crack initiation maraging steel selective laser melting
Contexto Educativo
Citação
R. Branco, J.D. Costa, J. Jesus, F. Berto, J.A. Martins Ferreira, C. Capela, Prediction of multiaxial fatigue life of notched maraging steel components manufactured by selective laser melting, Procedia Structural Integrity, Volume 39, 2022, Pages 273-280, ISSN 2452-3216, https://doi.org/10.1016/j.prostr.2022.03.097.
Editora
Elsevier