Motion of a Screw Dislocation under Uniform Applied Stress

Abstract

Acceleration motion of a screw dislocation is treated as a problem of an elastic continuum. The mechanical state around a moving dislocation under an applied stress is analysed with the use of the energy flow in an elastic field. The equation of motion is obtained on the basis of energy conservation: the energy inflow at the center of a moving dislocation is converted into kinetic energy of the elastic field around the dislocation. Numerical solutions are given for the free motion under a uniform stress and also for the motion with viscous force.