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Fatigue crack shape prediction based on vertex singularity

SYSNO ASEP	0337564
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Fatigue crack shape prediction based on vertex singularity
Author(s)	Hutař, Pavel (UFM-A)_{RID, ORCID} Náhlík, Luboš (UFM-A)_{RID, ORCID}
Number of authors	2
Source Title	Applied and Computational Mechanics - ISSN 1802-680X Roč. 2, č. 1 (2008), s. 45-52
Number of pages	8 s.
Language	eng - English
Country	CZ - Czech Republic
Keywords	3D vertex singularity ; crack shape ; fatigue crack propagation
Subject RIV	JL - Materials Fatigue, Friction Mechanics
R&D Projects	GA101/08/1623 GA ČR - Czech Science Foundation (CSF)
	GP106/06/P239 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z20410507 - UFM-A (2005-2011)
Annotation	Due to the existence of vertex singularity at the point where the crack intersects the free surface, stress distri-bution around the crack tip and the type of the singularity is changed. In the interior of the specimen the classical singular behaviour of the crack is dominant and can be described using analytic equations. Contrary to this, at the free surface or in the boundary layer close to free surface the vertex singularity is significant. The influence of vertex singularity on crack behaviour and a crack shape for a three-dimensional structure is described in this paper. The results presented make it possible to estimate fatigue crack growth rate and crack shape using the concept of the generalized stress intensity factor. The estimated fatigue crack shape can help to provide a more reliable estimation of the fatigue life of the structures considered.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2010

Number of the records: 1