Original title:
Estimation of critical values for crack propagation from sharp v-notch
Translated title:
Stanovení kritické hodnoty pro šíření trhliny z ostrého v-vrubu
Authors:
Majer, Zdeněk ; Hutař, Pavel ; Náhlík, Luboš ; Knésl, Zdeněk Document type: Papers Conference/Event: Engineering Mechanics 2007, Svratka (CZ), 2007-05-14 / 2007-05-17
Year:
2007
Language:
eng Abstract:
[eng][cze] The aim of this paper is to investigate the beginnings of crack propagation from sharp V-notches. Stress distribution around the tip of a V-notch is described on the basis of linear-elastic fracture mechanics. The V-notch is a singular stress concentrator with a singularity exponent dependent on the V-notch opening angle. The stability criteria are generalized for a stress singularity different from 0,5. Using FEM analysis the critical stress for crack initiation was estimated as a function of the V-notch angle. The results of numerical calculations were compared with experiments taken from the literature.Cílem tohoto článku je prozkoumat rozdělení napětí u čela V-vrubu. V-vrub je obecný singulární koncentrátor napětí s exponentem singularity závislým na úhlu otevření vrubu. Klasická kritéria stability jsou odvozena pro exponent singularity 0,5. Pomocí konečnoprvkové analýzy je zjistěna funkční závislost kritické hodnoty napětí na úhlu rozevření V-vrubu.
Keywords:
V-notch Project no.: CEZ:AV0Z20410507 (CEP), GP106/06/P239 (CEP), GD106/05/H008 (CEP) Funding provider: GA ČR, GA ČR Host item entry: Engineering Mechanics 2007, ISBN 978-80-87012-06-2
Institution: Institute of Physics of Materials AS ČR
(web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences. Original record: http://hdl.handle.net/11104/0158326