Critical applied stresses for a crack initiation from a sharp V-notch
Journal Title: Frattura ed Integrità Strutturale - Year 2014, Vol 8, Issue 30
Abstract
The aim of the paper is to estimate a value of the critical applied stress for a crack initiation from a 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 the 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 V-notch tip and for the estimation of the generalized stress intensity factor depending on the V-notch opening angle. Critical value of the generalized stress intensity factor was obtained using stability criteria based on the opening stress component averaged over a critical distance d from the V-notch tip and generalized strain energy density factor. Calculated values of the critical applied stresses were compared with experimental data from the literature and applicability of the LEFM concept is discussed.
Authors and Affiliations
L. Náhlík, P. Hutař, K. Štegnerová
Keywords
Related Articles
- EP ID EP147644
- DOI -
- Views 61
- Downloads 0
Hydrogen Re-Embrittlement of Aerospace grade High Strength Steels
Hydrogen Re-Embrittlement on anodically coated high strength steels is a relevant risk for aerospace structures due to the possibility of hydrogen uptake during the operative life of the components. AISI 4340...
Crack simulation models in variable amplitude loading - a review
This work presents a review of crack propagation simulation models considering plane stress and plane strain conditions. It is presented also a chronological different methodologies used to perform the crack ...
Infrared thermography study of the fatigue crack propagation
The work is devoted to the experimental study of heat dissipation process caused by fatigue crack propagation. To investigate a spatial and time temperature evolution at the crack tip set of experiments was carried...
State update algorithm for associativeelastic-plastic pressure-insensitive materialsby incremental energy minimization
This work presents a new state update algorithm for small-strain associative elastic-plasticconstitutive models, treating in a unified manner a wide class of deviatoric yield functions with linear ornonlinear strai...
Elementi di interfaccia per l’analisi di strutture murarie
The present paper deals with the modelling of the mechanical behaviour of masonry elements regarded as heterogeneous systems, made of mortar, bricks and interfaces. Thus, the adopted computational strategy consists in mo...