Mode I fatigue crack-propagation mechanism based on the renewal stochastic damage-accumulation model

A mechanism of mode I fatigue-crack propagation, which involves the initiation and opening of the cleavage-mode crack, is proposed. This approach uses a renewal stochastic damage-accumulation model for crack propagation, in which the parameters are defined based on the dislocation density and the el...

Full description

Saved in:
Bibliographic Details
Published in:Engineering fracture mechanics 2007-06, Vol.74 (9), p.1488-1498
Main Authors: Ihara, Chiaki, Tanaka, Takeyuki
Format: Article
Language:English
Subjects:
Cleavage-crack initiation
Crack opening
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Mode I fatigue-crack propagation
Physics
Solid mechanics
Stochastic damage-accumulation model
Structural and continuum mechanics
Δ Keff threshold
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A mechanism of mode I fatigue-crack propagation, which involves the initiation and opening of the cleavage-mode crack, is proposed. This approach uses a renewal stochastic damage-accumulation model for crack propagation, in which the parameters are defined based on the dislocation density and the elastic energy of dislocation. The calculated results of Δ K eff for d a/d n agree with the experimental data. Δ K eff th is calculated under the condition that the energy of cleavage-crack initiation is equal to that given from the outside of material. The plastic-zone size is calculated based on the number of dislocations on each slip line contained within it.
ISSN:0013-7944
1873-7315
DOI:10.1016/j.engfracmech.2006.08.005