Inclined dislocation emission versus brittle extension at crack tip
- Oak Ridge National Laboratory, TN (USA)
Dislocation emission from a crack tip along an inclined direction from the crack plane results in blunting of the crack tip. A dislocation free zone (DFZ) is formed. Additional dislocations are emitted from the blunt crack tip. The solution for the problem of dislocation pileup at a blunt crack tip with a DFZ has been obtained by applying the extended Wiener-Hopf technique to the pileup integral equation. A DFZ theory of fracture was developed earlier for the dislocation generation versus brittle fracture at the crack tip along the plane of the crack. This solution has been used to derive the critical K values for the inclined dislocation emission versus brittle extension at the blunt crack tip.
- OSTI ID:
- 5308500
- Report Number(s):
- CONF-840909--
- Journal Information:
- TMS (The Metallurgical Society) Paper Selection; (USA), Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Vol. 56; ISSN 0197-1689; ISSN TMPSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Inclined pileup of screw dislocations at the crack tip without a dislocation-free zone
Near threshold fatigue curve based on the dislocation shielding model of fracture
Related Subjects
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
BRITTLENESS
CORRELATIONS
CRACK PROPAGATION
CRACKS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELEMENTS
EQUATIONS
FAILURES
FRACTURES
LINE DEFECTS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
METALS