Počet záznamů: 1
Fatigue crack propagation in thin structures
0354082 - UFM-A 2011 RIV CH eng J - Článek v odborném periodiku
Hutař, Pavel - Seitl, Stanislav - Náhlík, Luboš - Knésl, Zdeněk
Fatigue crack propagation in thin structures.
Key Engineering Materials. Roč. 417-418, - (2010), s. 257-260 ISSN 1013-9826
Grant CEP: GA ČR GA101/08/1623; GA ČR GA106/09/1954; GA ČR GA101/09/0867
Výzkumný záměr: CEZ:AV0Z20410507
Klíčová slova: fatigue crack * vertex singularity * thin structures
Kód oboru RIV: JL - Únava materiálu a lomová mechanika
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.
Trvalý link: http://hdl.handle.net/11104/0193161