Estimation of critical values for crack initiation from sharp V-notches

0434989 - ÚFM 2015 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Náhlík, Luboš - Štegnerová, Kateřina - Hutař, Pavel
Estimation of critical values for crack initiation from sharp V-notches.
Engineering Mechanics 2014. 20th International conference. May 12-15, 2014, Svratka, Czech Republic. Book of full texts. Brno: Brno University of Technology. Institute of Solid Mechanics, Mechatronics and Biomechanics, 2014 - (Fuis, V.), s. 412-415. ISBN 978-80-214-4871-1. ISSN 1805-8248.
[Engineering Mechanics 2014 /20./. Svratka (CZ), 12.05.2014-15.05.2014]
Grant CEP: GA MŠMT(CZ) EE2.3.30.0063
Institucionální podpora: RVO:68081723
Klíčová slova: Failure initiation * stress singularity * V-notch * generalized stress intensity factor
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

Abstract: The aim of the paper is to estimate a critical value of an applied stress for a crack initiation from sharp tip of the V-notch using a procedure based on linear elastic fracture mechanics (LELM). The V-notch represents singular stress concentrator with the stress singularity exponent different from 0.5, therefore the generalized form of LELM for stress distribution description in the vicinity of the sharp V-notch was used. The stress singularity exponent depends on the V-notch opening angle, in general. A stability criterion based on the average value of the tangential stress component across a critical distance d from the V-notch tip is used in the paper. Resultant values of the critical applied stress are compared with experimental data.
Trvalý link: http://hdl.handle.net/11104/0238933