Quantitative Analysis of the Correlation between Geometric Parameters of Pits and Stress Concentration Factors for a Plate Subject to Uniaxial Tensile Stress
- The offshore environment is inherently corrosive. Consequently, pits may nucleate on exposed steel surfaces. Corrosion pits can be a source of crack initiation when the structure is subject to fatigue loading. The criticality of a corrosion pit with respect to the structural integrity depends on its shape and size and can be quantified using a stress concentration factor (š¾š”). In this work, a parametric 3D finite element model is developed to perform stress analysis of a pitted plate subjected to uniaxial tensile stress. The model is used for an extensive parameter study in which š¾š” is determined for various pit configurations. It is demonstrated that each one of the geometrical parameters holds a substantial influence on the location of the Most Critical Region (MCR). It is shown that š¾š” increases as the pit gets narrower. Pits with an elliptical mouth yield higher š¾š” values when the angle between the load direction and the pit mouth major axis increases. Moreover, š¾š” increases withThe offshore environment is inherently corrosive. Consequently, pits may nucleate on exposed steel surfaces. Corrosion pits can be a source of crack initiation when the structure is subject to fatigue loading. The criticality of a corrosion pit with respect to the structural integrity depends on its shape and size and can be quantified using a stress concentration factor (š¾š”). In this work, a parametric 3D finite element model is developed to perform stress analysis of a pitted plate subjected to uniaxial tensile stress. The model is used for an extensive parameter study in which š¾š” is determined for various pit configurations. It is demonstrated that each one of the geometrical parameters holds a substantial influence on the location of the Most Critical Region (MCR). It is shown that š¾š” increases as the pit gets narrower. Pits with an elliptical mouth yield higher š¾š” values when the angle between the load direction and the pit mouth major axis increases. Moreover, š¾š” increases with the increase in the localized thickness loss which is more pronounced for relatively wider pits. Finally, a regression model is presented for estimating š¾š” based on the geometric parameters of a pit.ā¦
Autor*innen: | F Mehri Sofiani, Somsubhro ChaudhuriORCiD, S.A. Elahi, K. Hectors, W. De Waele |
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Dokumenttyp: | Zeitschriftenartikel |
Verƶffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des Ć¼bergeordneten Werkes (Englisch): | Theoretical and Applied Fracture Mechanics |
Jahr der Erstverƶffentlichung: | 2023 |
Organisationseinheit der BAM: | 8 Zerstƶrungsfreie PrĆ¼fung |
8 Zerstƶrungsfreie PrĆ¼fung / 8.0 Abteilungsleitung und andere | |
Verlag: | Elsevier Ltd. |
Jahrgang/Band: | 127 |
Aufsatznummer: | 104081 |
Erste Seite: | 1 |
Letzte Seite: | 27 |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Angewandte Physik |
Freie Schlagwƶrter: | Corrosion; FEM; Pitting corrosion; SCF |
Themenfelder/AktivitƤtsfelder der BAM: | Energie |
DOI: | 10.1016/j.tafmec.2023.104081 |
ISSN: | 0167-8442 |
VerfĆ¼gbarkeit des Dokuments: | Datei im Netzwerk der BAM verfĆ¼gbar ("Closed Access") |
Datum der Freischaltung: | 13.09.2023 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 23.10.2023 |