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Sensitivity of Fatigue Crack Growth Data to Specimen Geometry
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SYSNO ASEP 0317639 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Sensitivity of Fatigue Crack Growth Data to Specimen Geometry Title Citlivost měřených dat při únavové šíření trhlin na tvar zkušebního tělesa Author(s) Seitl, Stanislav (UFM-A) RID, ORCID
Hutař, Pavel (UFM-A) RID, ORCID
Knésl, Zdeněk (UFM-A)Source Title Key Engineering Materials - ISSN 1013-9826
Roč. 385-387, - (2008), s. 557-560Number of pages 4 s. Language eng - English Country CH - Switzerland Keywords Fatigue crack ; Paris law ; threshold values 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) UT WOS 000262126000140 Annotation A commonly used formula in the field of high cycle fatigue is the Paris-Erdogan law. For given experimental conditions (such as temperature, stress ratio or environmental conditions) the parameters C and m have to be experimentally determined and considered as material constants. Thus, for a given material, the fatigue crack growth rate (FCGR) depends only on the applied range of the stress intensity factor. In a threshold region a significant shift in the data of the fatigue crack propagation rate can be observed. The shift is induced by different test specimen geometry. The authors will present their own laboratory fatigue crack growth rate test data measured on two different specimens with different levels of constraint and for different steels. It is demonstrated that fatigue characteristics (i.e. C, m and Kth) obtained from different specimen geometries are not only properties of the materials but properties of the structure itself. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2009
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