Influence of the V-notch opening angle on critical applied force values for the crack initiation from the sharp V-notch

0448572 - ÚFM 2016 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Štegnerová, Kateřina - Náhlík, Luboš - Hutař, Pavel
Influence of the V-notch opening angle on critical applied force values for the crack initiation from the sharp V-notch.
Advances in Fracture and Damage Mechanics XIII. Zürich: Trans Tech publications, 2015 - (Alfaiate, J.; Aliabadi, M.), s. 165-168. Key Engineering Materials, 627. ISBN 978-3-03835-235-8. ISSN 1013-9826.
[FDM 2014 International Conference on Fracture and Damage Mechanics /13./. São Miguel Island, Azores (PT), 23.09.2014-25.09.2014]
Grant CEP: GA MŠMT(CZ) EE2.3.30.0063
Institucionální podpora: RVO:68081723
Klíčová slova: sharp V-notch * crack initiation * stress singularity * generalized stress intensity factor
Kód oboru RIV: JL - Únava materiálu a lomová mechanika
www.scientific.net/KEM.627.165

The aim of this paper is to estimate a value of the critical applied force for a crack initiation from the sharp V-notch tip. The classical approach of the linear elastic fracture mechanics (LELM) was generalized, because the stress singularity exponent differs from 0.5 in studied case. The value of the stress singularity exponent depends on the V-notch opening angle. The finite element method was used for a determination of stress distribution in the vicinity of the sharp Vnotch tip and for the estimation of the generalized stress intensity factor depending on the V-notch opening angle. Critical value of generalized stress intensity factor was obtained by using stability criterion based on the tangential stress component averaged over a critical distance d from the Vnotch tip. Calculated values of the critical applied force were compared with experimental data taken from the literature.
Trvalý link: http://hdl.handle.net/11104/0250238