Representation of Dislocation Dynamics Simulations

Abstract

The dislocation content of each active slip system in a crystal is defined by its Dislocation Density Vector (DDV). Each DDV possesses signed screw and edge components having lengths equal to the length per unit volume of all dislocations of like sign lying in the slip plane, projected parallel and perpendicular, respectively, to the slip direction. The length of the DDV is proportional to the length/unit volume of dislocations of like sign and its orientation is a measure of the edge-screw character of the population. To demonstrate this representation, we analyze a simulation of a micropillar of single crystal Ni deformed in compression. Finally, we discuss possible extensions of the analysis to determine parameters characterizing the motion of the distribution.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2010
Accession Number
ADA582289

Entities

People

  • Christopher Woodward
  • Craig S. Hartley
  • Jaafar A. El Awady

Organizations

  • Johns Hopkins University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Air Force Research Laboratories
  • Computers
  • Constitutive Equations
  • Coordinate Systems
  • Crystals
  • Dislocations
  • High Performance Computing
  • Information Operations
  • Military Research
  • Orientation (Direction)
  • Personal Information Managers
  • Personality
  • Simulations
  • Single Crystals
  • Strain Rate

Readers

  • Computer Vision.
  • Materials Science and Engineering.