0
TECHNICAL PAPERS

Free-Surface Effects in 3D Dislocation Dynamics: Formulation and Modeling

[+] Author and Article Information
Tariq A. Khraishi

Department of Mechanical Engineering, University of New Mexico, Albuquerque, NM 87131e-mail: khraishi@me.unm.edu

Hussein M. Zbib

School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164e-mail: zbib@mme.wsu.edu

J. Eng. Mater. Technol 124(3), 342-351 (Jun 10, 2002) (10 pages) doi:10.1115/1.1479694 History: Received September 04, 2001; Revised March 15, 2002; Online June 10, 2002
Copyright © 2002 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
A dislocation segment inside a computational box
Grahic Jump Location
Segment A1B1 beneath a surface with ascribed local coordinate system
Grahic Jump Location
A mesh of rectangular elements, representing prismatic dislocation loops, covering area S upon which surface traction annulment is sought. The inset shows one of these prismatic dislocation loops.
Grahic Jump Location
Faces of a DD computational box uniformly meshed with square elements representing prismatic dislocation loops
Grahic Jump Location
A dislocation segment in a DD computational box reflected off of the six external box surfaces
Grahic Jump Location
Comparisons of the stresses from the current work (TK) versus the work by Maurissen and Capella (MC) for a sub-surface vertical segment. Stresses are in Pa. The segment points in the positive z-direction, has a zero y-component of b, and a length of 100b. The stresses are plotted along an axis parallel to the y-axis at a depth of 400b. The surface is 20,000b on each side and has a mesh density of 10×10 loops.
Grahic Jump Location
Same as Fig. 6 but with a surface mesh density of 30×30 loops.
Grahic Jump Location
Same as Fig. 6 but with a surface mesh density of 50×50 loops
Grahic Jump Location
The Peach-Koehler force pulling a subsurface horizontal segment towards the surface versus the segment depth for a fixed segment length
Grahic Jump Location
The Peach-Koehler force pulling a subsurface horizontal segment towards the surface versus the segment length for a fixed segment depth
Grahic Jump Location
Stress-strain diagrams from DD simulations for one operational Frank-Read source in a cubic cell that is 10,000b in side length. The source is close to the cell’s external surfaces. The continuous line correspond to no treatment of the traction-free boundary condition, and the dashed lines corresponds to an external surface mesh density of 10×10 loops, 20×20 loops, and 30×30 loops.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In