Interaction factors for two elliptical embedded cracks with a wide range of aspect ratios

The value of stress intensity factor may be increased through the interaction of multiple cracks that are in close proximity to one another. We investigated the interaction factors of two equal elliptical cracks with a wide range of aspect ratios. Finite element analysis for a linear elastic solid w...

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Bibliographic Details
Published in:AIMS materials science 2017-01, Vol.4 (2), p.328-339
Main Authors: Azuma, Kisaburo, Li, Yinsheng
Format: Article
Language:English
Subjects:
embedded crack
finite element analysis
fitness-for-service
fracture mechanics
interaction factor
multiple crack interaction
stress intensity factor
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Summary:The value of stress intensity factor may be increased through the interaction of multiple cracks that are in close proximity to one another. We investigated the interaction factors of two equal elliptical cracks with a wide range of aspect ratios. Finite element analysis for a linear elastic solid was used to obtain the interaction factor for embedded cracks in an infinite model subjected to remote tension loading. Relationships between interaction factors and dimensionless distances between the cracks were discussed. The results demonstrated that the interaction factors depend on the crack aspect ratio, whose effect is related to the dimensionless distance. Thus, it is suggested that interaction factors can be reasonably characterized using different dimensionless distances depending on the aspect ratio. Finally, we provide a simple empirical formula for obtaining the interaction factors for embedded cracks.
ISSN:2372-0484
DOI:10.3934/matersci.2017.2.328