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Fatigue crack propagation in thin structures
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SYSNO ASEP 0354082 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fatigue crack propagation in thin structures Author(s) Hutař, Pavel (UFM-A) RID, ORCID
Seitl, Stanislav (UFM-A) RID, ORCID
Náhlík, Luboš (UFM-A) RID, ORCID
Knésl, Zdeněk (UFM-A)Number of authors 4 Source Title Key Engineering Materials - ISSN 1013-9826
Roč. 417-418, - (2010), s. 257-260Number of pages 4 s. Language eng - English Country CH - Switzerland Keywords fatigue crack ; vertex singularity ; thin structures Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GA101/08/1623 GA ČR - Czech Science Foundation (CSF) GA106/09/1954 GA ČR - Czech Science Foundation (CSF) GA101/09/0867 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000279319200065 Annotation The influence of specimen thickness on fatigue crack behaviour has been investigated. To this aim the fatigue crack propagation rate has been measured on two different types of test specimens with varying thickness. The change of stress singularity exponent for the crack front due to vicinity of the free surface is considered. To explain the effect of stress singularity changes on obtained experimental results a methodology based on generalized stress intensity factor and strain energy density concept has been used. It is shown that for materials with Poisson’s ratio of about 0.3 the free surface effect does not play a decisive role for specimens with a low level of in-plane constraint but can influence fatigue crack propagation rate in the case of geometries with a high level of the constraint. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2011
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