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Does the cyclic J-integral ΔJ describe the crack-tip opening displacement in the presence of crack closure?

  • In this paper, the correlation of the cyclic J-integral, ΔJ, and the cyclic crack-tip opening displacement, ΔCTOD, is studied in the presence of crack closure to assess the question if ΔJ describes the crack-tip opening displacement in this case. To this end, a method is developed to evaluate ΔJ numerically within finite-element calculations. The method is validated for an elastic–plastic materialIn this paper, the correlation of the cyclic J-integral, ΔJ, and the cyclic crack-tip opening displacement, ΔCTOD, is studied in the presence of crack closure to assess the question if ΔJ describes the crack-tip opening displacement in this case. To this end, a method is developed to evaluate ΔJ numerically within finite-element calculations. The method is validated for an elastic–plastic material that exhibits Masing behavior. Different strain ranges and strain ratios are considered under fully plastic cyclic conditions including crack closure. It is shown that the cyclic J-integral is the parameter to determine the cyclic crack-tip opening displacement even in cases where crack closure is present.show moreshow less

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Metadaten
Author:Mario Metzger, Thomas SeifertGND, Christoph Schweizer
Publisher:Elsevier Science
Place of publication:Kidlington
Year of Publication:2015
Language:English
GND Keyword:Finite-Elemente-Methode; Integralrechnung; Spalt; Verschluss
Tag:Crack closure; Cyclic J; Fatigue crack growth; J-integral
Parent Title (English):Engineering Fracture Mechanics
Volume:134
ISSN:0013-7944
First Page:459
Last Page:473
Document Type:Article (reviewed)
Institutes:Hochschule Offenburg / Bibliografie
Acces Right:Frei zugänglich
Release Date:2018/12/18
Licence (German):License LogoEs gilt das UrhG
URN:urn:nbn:de:0011-n-3320648
DOI:https://doi.org/10.1016/j.engfracmech.2014.07.017