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Title:Modelling of fatigue microfracture in porous sintered steel using a phase-field method
Authors:ID Tomić, Zoran (Author)
ID Jarak, Tomislav (Author)
ID Lesičar, Tomislav (Author)
ID Gubeljak, Nenad (Author)
ID Tonković, Zdenko (Author)
Files:.pdf Tomic-2023-Modelling_of_Fatigue_Microfracture.pdf (8,81 MB)
MD5: 17B8C8B4D9A3A2A32251AD9DF38F4721
 
URL https://doi.org/10.3390/ma16114174
 
Language:English
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract: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.
Keywords:sintered steel, microcracks, fatigue, phase-field method, porosity
Publication status:Published
Publication version:Version of Record
Submitted for review:30.04.2023
Article acceptance date:30.05.2023
Publication date:03.06.2023
Publisher:MDPI
Year of publishing:2023
Number of pages:Str. 1-22
Numbering:Letn. 16, Št. 11, št. članka 4174
PID:20.500.12556/DKUM-87032 New window
UDC:621.9:539.3
ISSN on article:1996-1944
COBISS.SI-ID:154724355 New window
DOI:10.3390/ma16114174 New window
Publication date in DKUM:09.02.2024
Views:349
Downloads:27
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
TOMIĆ, Zoran, JARAK, Tomislav, LESIČAR, Tomislav, GUBELJAK, Nenad and TONKOVIĆ, Zdenko, 2023, Modelling of fatigue microfracture in porous sintered steel using a phase-field method. Materials [online]. 2023. Vol. 16, no. Št. 11,  članka 4174, p. 1–22. [Accessed 13 April 2025]. DOI 10.3390/ma16114174. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=87032
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Record is a part of a journal

Title:Materials
Shortened title:Materials
Publisher:MDPI
ISSN:1996-1944
COBISS.SI-ID:33588485 New window

Document is financed by a project

Funder:HRZZ - Croatian Science Foundation
Project number:PZS-1 2019-02-4177
Name:Multiscale Numerical Modelling and Experimental Investigation of Aging Processes in Sintered Structural Components
Acronym:MultiSintAge

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:03.06.2023

Secondary language

Language:Slovenian
Keywords:sintrano jeklo, mikrorazpoke, utrujanje, metoda faznega polja, poroznost


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