Dislocation Dynamics Simulations in the Presence of Interacting Cracks

[+] Author and Article Information
I. Demir

Department of Mechanical Engineering, King Saud University, PO Box 800, Riyadh, 11421, Saudi Arabia

A. N. Gulluoglu

Department of Materials Engineering, Marmara University, Goztepe, Istanbul, Turkey

J. Eng. Mater. Technol 121(2), 151-155 (Apr 01, 1999) (5 pages) doi:10.1115/1.2812360 History: Received June 15, 1998; Revised October 26, 1998; Online November 27, 2007


For an understanding failure behavior of crystalline solids, considerable interest is given to investigating interaction effects between the main crack and microcracks in the presence of mobile dislocations. Accurate analysis of these types of interaction problems may lead to accurate models for failure prevention and the history of plastic zone development. High stress concentration areas such as crack tips are the places where dislocations are subjected to higher forces. Therefore, a computer simulation technique based on dislocation dynamics has been developed to investigate the movement of dislocations in the presence of multiple cracks. Dislocation structures, dislocation distribution and strain rate results are presented as functions of applied stresses for different microcrack positions and orientations. Simulation results give a reasonable description of dislocation pattern development during deformation around the cracks and explain the shape and development of the plastic zone.

Copyright © 1999 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





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