On the Dynamic Behavior of a Frank-Read Source

[+] Author and Article Information
J. D. Campbell

Department of Engineering Science, Oxford University, Oxford, England

J. A. Simmons

Institute of Engineering Research, University of California, Berkeley, Calif.

J. E. Dorn

University of California, Berkeley, Calif.

J. Appl. Mech 28(3), 447-453 (Sep 01, 1961) (7 pages) doi:10.1115/1.3641726 History: Received August 12, 1960; Online September 16, 2011


The equation of motion for a curved dislocation moving at high velocities in a slip plane is solved for a dislocation half-mill. It is found that the angular velocity of a dislocation half-mill about the pinning point is constant for constant stress. The solution is applied to a Frank-Read source to give the shape of the nucleating source and the time of activation. For Al, the time of nucleation of a Frank-Read source is about 9 × 10−10 sec when the stress on the source is 5 × 10−4 G.

Copyright © 1961 by ASME
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