Multiscale fatigue crack growth modelling for welded stiffened panels

Božić, Željko and Schmauder, Siegfried and Mlikota, Marijo and Hummel, Martin (2014) Multiscale fatigue crack growth modelling for welded stiffened panels. = Multiscale fatigue crack growth modelling for welded stiffened panels. Fatigue and Fracture of Engineering Materials and Structures, 37 (9). pp. 1043-1054. ISSN 8756-758X. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q2 (2013). Točan broj autora: 4.

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Abstract

The influence of welding residual stresses in stiffened panels on effective stress intensity factor (SIF) values and fatigue crack growth rate is studied in this paper. Interpretation of relevant effects on different length scales such as dislocation appearance and microstructural crack nucleation and propagation is taken into account using molecular dynamics simulations as well as a Tanaka-Mura approach for the analysis of the problem. Mode I SIFs, K I, were calculated by the finite element method using shell elements and the crack tip displacement extrapolation technique. The total SIF value, Ktot, is derived by a part due to the applied load, Kappl, and by a part due to welding residual stresses, Kres. Fatigue crack propagation simulations based on power law models showed that high tensile residual stresses in the vicinity of a stiffener significantly increase the crack growth rate, which is in good agreement with experimental results. © 2014 Wiley Publishing Ltd.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): Computer simulation; Dislocations (crystals); Fatigue crack propagation; Molecular dynamics; Residual stresses; Stress intensity factors; Welding; Crack tip displacement; Different length scale; Effective stress intensity factor; Fatigue crack growth modelling; Microstructurally small cracks; Molecular dynamics simulations; Tensile residual stress; Welding residual stress; Cracks
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 1300 Department of Aeronautical Engineering > 1310 Chair of Aerodynamics
Indexed in Web of Science: Yes
Indexed in Current Contents: Yes
Citations JCR: 0 (20.5.2015.)
Quartiles: Q2 (2013)
Citations SCOPUS: 0 (20.5.2015.)
Date Deposited: 20 May 2015 12:30
Last Modified: 20 May 2015 12:30
URI: http://repozitorij.fsb.hr/id/eprint/4323

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