Crack initiation at V-notch tip subjected to in-plane mixed mode loading: An application of the fictitious notch rounding concept
Journal Title: Frattura ed Integrità Strutturale - Year 2015, Vol 9, Issue 34
Abstract
The fictitious notch rounding concept is applied for the first time to V-notches with root hole subjected to in-plane mixed mode loading. Out-of-bisector crack propagation is taken into account. The fictitious notch radius is determined as a function of the real notch radius the microstructural support length and the notch opening angle. Due to the complexity of the problem, a method based on the simple normal stress failure criterion has been used. It is combined with the maximum tangential stress criterion to determine the crack propagation angle. An analytical method based on Neuber's procedure has been developed. The method provides the values of the microstructural support factor as a function of the mode ratio and the notch opening angle. The support factor is considered to be independent of the microstructural support length. Finally, for comparison, the support factor is determined on a purely numerical basis by iterative analysis of FE models.
Authors and Affiliations
F. Berto
Keywords
Related Articles
- EP ID EP128000
- DOI 10.3221/IGF-ESIS.34.18
- Views 62
- Downloads 0
Interaction of shear and normal stresses in multiaxial fatigue damage analysis
Due to the abundance of engineering components subjected to complex multiaxial loading histories, being able to accurately estimate fatigue damage under multiaxial stress states is a fundamental step in many...
Utilizzo della tensione di picco per la verifica a fatica dei giunti saldati d’angolo con il metodo degli elementi finiti
In questo lavoro viene applicato il metodo della tensione di picco per l’analisi della resistenza a fatica di giunti saldati con cordone d’angolo limitatamente al caso di rottura al piede del cordone di saldatura. Il met...
Investigation of crack propagation in single optical fiber composite with thermal influence by finite element method
Two parallel comparative ‘Conventional Method and Computer Simulation using ANSYS software’ for prediction of crack growth and its behavior in optical fiber are studied and presented in this work. Corresponding finite el...
Individuazione frattografica di rotture per fatica in componenti metallici con microstrutture complesse
L’individuazione frattografica delle fratture per fatica risulta spesso piuttosto complessa nei materiali che non esibiscono adeguata duttilità. Microstrutture complesse caratterizzate dalla presenza di numerosi co...
On the notch sensitivity of cast iron under multi-axial fatigue loading
This work deals with the notch sensitivity of sharp notches under multi-axial fatigue loading. The main discussion concerns the differences in notch sensitivity at high cycle fatigue regime, between tensile, tors...