Inclined Pileup of Edge Dislocations Near the Crack Tip.

Abstract

The formation of a plastic zone, in the form of a linear array of inclined edge dislocations in front of a mode I crack in plane strain, is studied. The direction of the force field on an edge dislocation due to the crack load allows for the determination of the plastic zone as a function of the inclination angle. The dislocation distribution along the plastic zone is found from force equilibrium considerations. The results show the presence of a dislocation free zone (DFZ) and a shrinking of the plastic zone size with greater angle of inclination. The latter angle does not seem to influence the DFZ size. The way in which we determined the stress field allows us to study the influence of defects on the plastic zone formation. Keywords: cracking(fracturing); plane strain solutions; electron microscopy.

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Document Details

Document Type
Technical Report
Publication Date
Dec 03, 1986
Accession Number
ADA175610

Entities

People

  • A. C. Eringen
  • G. D. Dhondt

Organizations

  • Princeton University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Cartesian Coordinates
  • Civil Engineering
  • Computer Programs
  • Crack Tips
  • Cracks
  • Dislocations
  • Elastic Materials
  • Electron Microscopes
  • Electron Microscopy
  • Electrons
  • Engineering
  • Equations
  • Integral Equations
  • Microscopy
  • Security
  • Shear Stresses

Fields of Study

  • Engineering

Readers

  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Microelectronics