Critical Value for Crack Propagation from Sharp V-Notch

Abstract:

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.

• Periodical: Key Engineering Materials (Volumes 592-593)
• Pages: 177-180
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.592-593.177
• Online since: November 2013
• Authors: Luboš Náhlík, Kateřina Štegnerová, Pavel Hutař, Zdeněk Majer
• Keywords: Generalized Strain Energy Density Factor, Generalized Stress Intensity Factor, Linear Elastic Fracture Mechanics, Stress Singularity, V-Notch

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