RT info:eu-repo/semantics/article
T1 Modelling of fatigue microfracture in porous sintered steel using a phase-field method
A1 Tomić, Zoran
A1 Jarak, Tomislav
A1 Lesičar, Tomislav
A1 Gubeljak, Nenad
A1 Tonković, Zdenko
K1 Metals
K1 Metallic Materials
K1 Metales -  Materiales
K1 Materials science
K1 Ciencia de los materiales
K1 Microcracks
K1 Fatigue
K1 Materiales - Fatiga
K1 Metales - Fatiga
K1 Phase field method
K1 Porosity
K1 Porosidad
K1 2303.18 Metales
K1 3312 Tecnología de Materiales
AB Porosity in sintered materials negatively affects its fatigue properties. In investigating its influence, the application of numerical simulations reduces experimental testing, but they are computationally very expensive. In this work, the application of a relatively simple numerical phase-field (PF) model for fatigue fracture is proposed for estimation of the fatigue life of sintered steels by analysis of microcrack evolution. A model for brittle fracture and a new cycle skipping algorithm are used to reduce computational costs. A multiphase sintered steel, consisting of bainite and ferrite, is examined. Detailed finite element models of the microstructure are generated from high-resolution metallography images. Microstructural elastic material parameters are obtained using instrumented indentation, while fracture model parameters are estimated from experimental S–N curves. Numerical results obtained for monotonous and fatigue fracture are compared with data from experimental measurements. The proposed methodology is able to capture some important fracture phenomena in the considered material, such as the initiation of the first damage in the microstructure, the forming of larger cracks at the macroscopic level, and the total life in a high cycle fatigue regime. However, due to the adopted simplifications, the model is not suitable for predicting accurate and realistic crack patterns of microcracks.
PB MDPI
SN 1996-1944
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/65822
UL https://uvadoc.uva.es/handle/10324/65822
LA eng
NO Materials, 2023, Vol. 16, Nº. 11, 4174
NO Producción Científica
DS UVaDOC
RD 20-may-2024