Accession Number:

ADA582289

Title:

Representation of Dislocation Dynamics Simulations

Descriptive Note:

Conference paper

Corporate Author:

JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF MECHANICAL ENGINEERING

Report Date:

2010-10-01

Pagination or Media Count:

5.0

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 lengthunit 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.

Subject Categories:

  • Crystallography
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE