Publication detail
Effective Stress Intensity Factor for Crack of Intergranular Morphology
HORNÍKOVÁ, J. ŠANDERA, P. POKLUDA, J.
Czech title
Efektivní součinitel intensity napětí pro trhlinu s interkrystalickou morfologií
English title
Effective Stress Intensity Factor for Crack of Intergranular Morphology
Type
conference paper
Language
en
Original abstract
The microtortuosity of the crack front induces a local mixed mode 1+2+3 even in case of the remote mode I loading. It causes a shielding effect not taken into account in standard procedures for evaluation of fracture characteristics. The main aim of this work is to perform a 3D BEM analysis of the elastic stress-strain field at the front of real-like intergranular cracks. Results of this analysis are evaluated in terms of the integral effective stress intensity factor keff related to the intergranular crack front. Quantitative estimation of the corresponding shielding level can be used for correcting values of fracture toughness in order to get intrinsic component characterising well the real resistance of grain boundaries against the unstable crack growth initiation.
English abstract
The microtortuosity of the crack front induces a local mixed mode 1+2+3 even in case of the remote mode I loading. It causes a shielding effect not taken into account in standard procedures for evaluation of fracture characteristics. The main aim of this work is to perform a 3D BEM analysis of the elastic stress-strain field at the front of real-like intergranular cracks. Results of this analysis are evaluated in terms of the integral effective stress intensity factor keff related to the intergranular crack front. Quantitative estimation of the corresponding shielding level can be used for correcting values of fracture toughness in order to get intrinsic component characterising well the real resistance of grain boundaries against the unstable crack growth initiation.
Keywords in English
Effective stress intensity factor, intergranular crack front, shielding effect, ultra high strength steels, boundary element method, CT specimen.
RIV year
2001
Released
27.06.2001
Publisher
Vutium
Location
Brno
ISBN
80-214-1892-3
Book
Materials Structure & Micromechanics of Fracture (MSMF-3)
Pages count
9
BIBTEX
@inproceedings{BUT2821,
author="Jana {Horníková} and Pavel {Šandera} and Jaroslav {Pokluda},
title="Effective Stress Intensity Factor for Crack of Intergranular Morphology",
booktitle="Materials Structure & Micromechanics of Fracture (MSMF-3)",
year="2001",
month="June",
publisher="Vutium",
address="Brno",
isbn="80-214-1892-3"
}