Critical Value for Crack Propagation from Sharp V-Notch

0398722 - ÚFM 2015 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Náhlík, Luboš - Štegnerová, Kateřina - Hutař, Pavel - Majer, Z.
Critical Value for Crack Propagation from Sharp V-Notch.
Materials Structure and Micromechanics of Fracture VII. Zurich: Trans Tech Publications, 2014 - (Šandera, P.), s. 177-180. Key Engineering Materials, 592-593. ISBN 978-3-03785-934-6. ISSN 1013-9826.
[MSMF 7 - International Conference on Materials Structure & Micromechanics of Fracture /7./. Brno (CZ), 01.07.2013-03.07.2013]
Grant CEP: GA MŠMT(CZ) EE2.3.20.0214
Grant ostatní: VUT(CZ) FSIJ- 13-2046
Institucionální podpora: RVO:68081723
Klíčová slova: V-notch * linear elastic fracture mechanics * stress singularity * generalized stress intensity factor * generalized strain energy density factor
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

The contribution is focused on estimation of a critical value of generalized stress intensity factor for crack propagation from sharp V-notches. Stress distribution around the tip of the V-notch is described on the base of generalized linear elastic fracture mechanics, because V-notch is a singular stress concentrator with stress singularity exponent different from 0.5 (depending on V-notch opening angle). Then also stability criteria based on strain energy density factor and average critical stress are generalized for the stress singularity different from 0.5. Using FE analysis the critical stresses for crack initiation was estimated and compared with experimental data from the literature.
Trvalý link: http://hdl.handle.net/11104/0228240