Study of the Fatigue Crack Growth in Long-Term Operated Mild Steel under Mixed-Mode (I + II, I + III) Loading Conditions

The paper presents an analysis of mixed-mode fatigue crack growth in bridge steel after 100-years operating time. Experiments were carried out under mode I + II configuration on Compact Tension Shear (CTS) specimens and mode I + III on rectangular specimens with lateral stress concentrator under ben...

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Autores principales: Lesiuk, Grzegorz, Smolnicki, Michał, Rozumek, Dariusz, Krechkovska, Halyna, Student, Oleksandra, Correia, José, Mech, Rafał, De Jesus, Abílio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6982046/
https://www.ncbi.nlm.nih.gov/pubmed/31906261
http://dx.doi.org/10.3390/ma13010160
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author Lesiuk, Grzegorz
Smolnicki, Michał
Rozumek, Dariusz
Krechkovska, Halyna
Student, Oleksandra
Correia, José
Mech, Rafał
De Jesus, Abílio
author_facet Lesiuk, Grzegorz
Smolnicki, Michał
Rozumek, Dariusz
Krechkovska, Halyna
Student, Oleksandra
Correia, José
Mech, Rafał
De Jesus, Abílio
author_sort Lesiuk, Grzegorz
collection PubMed
description The paper presents an analysis of mixed-mode fatigue crack growth in bridge steel after 100-years operating time. Experiments were carried out under mode I + II configuration on Compact Tension Shear (CTS) specimens and mode I + III on rectangular specimens with lateral stress concentrator under bending and torsion loading type. Due to the lack of accurate Stress Intensity Factor (SIF) solutions, the crack path was modelled with the finite element method according to its experimental observation. As a result, the Kinetic Fatigue Fracture Diagrams (KFFD) were constructed. Due to the change in the tendency of higher fatigue crack growth rates from K(I) towards K(III) dominance for the samples subjected to bending and torsion, it was decided to analyze this phenomenon in detail using electron-scanning microscopy. The fractographic analysis was carried out for specimens subjected to I + III crack loading mode. The mechanism of crack growth in old bridge steel at complex loads was determined and analyzed.
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spelling pubmed-69820462020-02-07 Study of the Fatigue Crack Growth in Long-Term Operated Mild Steel under Mixed-Mode (I + II, I + III) Loading Conditions Lesiuk, Grzegorz Smolnicki, Michał Rozumek, Dariusz Krechkovska, Halyna Student, Oleksandra Correia, José Mech, Rafał De Jesus, Abílio Materials (Basel) Article The paper presents an analysis of mixed-mode fatigue crack growth in bridge steel after 100-years operating time. Experiments were carried out under mode I + II configuration on Compact Tension Shear (CTS) specimens and mode I + III on rectangular specimens with lateral stress concentrator under bending and torsion loading type. Due to the lack of accurate Stress Intensity Factor (SIF) solutions, the crack path was modelled with the finite element method according to its experimental observation. As a result, the Kinetic Fatigue Fracture Diagrams (KFFD) were constructed. Due to the change in the tendency of higher fatigue crack growth rates from K(I) towards K(III) dominance for the samples subjected to bending and torsion, it was decided to analyze this phenomenon in detail using electron-scanning microscopy. The fractographic analysis was carried out for specimens subjected to I + III crack loading mode. The mechanism of crack growth in old bridge steel at complex loads was determined and analyzed. MDPI 2020-01-01 /pmc/articles/PMC6982046/ /pubmed/31906261 http://dx.doi.org/10.3390/ma13010160 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lesiuk, Grzegorz
Smolnicki, Michał
Rozumek, Dariusz
Krechkovska, Halyna
Student, Oleksandra
Correia, José
Mech, Rafał
De Jesus, Abílio
Study of the Fatigue Crack Growth in Long-Term Operated Mild Steel under Mixed-Mode (I + II, I + III) Loading Conditions
title Study of the Fatigue Crack Growth in Long-Term Operated Mild Steel under Mixed-Mode (I + II, I + III) Loading Conditions
title_full Study of the Fatigue Crack Growth in Long-Term Operated Mild Steel under Mixed-Mode (I + II, I + III) Loading Conditions
title_fullStr Study of the Fatigue Crack Growth in Long-Term Operated Mild Steel under Mixed-Mode (I + II, I + III) Loading Conditions
title_full_unstemmed Study of the Fatigue Crack Growth in Long-Term Operated Mild Steel under Mixed-Mode (I + II, I + III) Loading Conditions
title_short Study of the Fatigue Crack Growth in Long-Term Operated Mild Steel under Mixed-Mode (I + II, I + III) Loading Conditions
title_sort study of the fatigue crack growth in long-term operated mild steel under mixed-mode (i + ii, i + iii) loading conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6982046/
https://www.ncbi.nlm.nih.gov/pubmed/31906261
http://dx.doi.org/10.3390/ma13010160
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