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Mode I fatigue crack growth at notches considering crack closure

Savaidis, Georgios ; Savaidis, Alexander ; Zerres, Patrick ; Vormwald, Michael (2010)
Mode I fatigue crack growth at notches considering crack closure.
In: International Journal of Fatigue, 32 (10)
Article, Bibliographie

Abstract

Fn analytical elastic–plastic model is presented describing the fatigue life of arbitrary engineering components with elliptical notches under constant amplitude loading. A DJeff-based crack growth law is integrated from a starting crack size of micro-structural dimension up to the total fracture of the component. Plasticity-induced crack opening and closure effects are explicitly taken into account. Calculated opening load levels for cracks growing in notch affected areas have been found to be in good agreement with corresponding experimental values determined from notched specimens made of two different metallic materials. Comparison of experimentally determined and calculated crack growth curves for specimens with central notches confirm the satisfactory accuracy of model. The experimental verification of the model’s calculation accuracy covers various ductile materials, notch geometries, load amplitudes and mean load effects.

Item Type: Article
Erschienen: 2010
Creators: Savaidis, Georgios ; Savaidis, Alexander ; Zerres, Patrick ; Vormwald, Michael
Type of entry: Bibliographie
Title: Mode I fatigue crack growth at notches considering crack closure
Language: English
Date: March 2010
Publisher: Elsevier
Journal or Publication Title: International Journal of Fatigue
Volume of the journal: 32
Issue Number: 10
Abstract:

Fn analytical elastic–plastic model is presented describing the fatigue life of arbitrary engineering components with elliptical notches under constant amplitude loading. A DJeff-based crack growth law is integrated from a starting crack size of micro-structural dimension up to the total fracture of the component. Plasticity-induced crack opening and closure effects are explicitly taken into account. Calculated opening load levels for cracks growing in notch affected areas have been found to be in good agreement with corresponding experimental values determined from notched specimens made of two different metallic materials. Comparison of experimentally determined and calculated crack growth curves for specimens with central notches confirm the satisfactory accuracy of model. The experimental verification of the model’s calculation accuracy covers various ductile materials, notch geometries, load amplitudes and mean load effects.

Uncontrolled Keywords: Fracture mechanics Crack growth Crack closure Notches Fatigue life prediction
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Steel Constructions and Material Mechanics > Fachgebiet Werkstoffmechanik
13 Department of Civil and Environmental Engineering Sciences > Institute of Steel Constructions and Material Mechanics
13 Department of Civil and Environmental Engineering Sciences
Date Deposited: 30 Jan 2015 13:40
Last Modified: 19 Mar 2015 08:59
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