Abstract
The results are presented on computer simulation of plastic deformation of a single crystal under action of constant and alternating loads applied simultaneously. A model of nucleation and motion of dislocation lines on the area of simulating with defects arranged randomly is briefly described. Regions of varying the plasticity curve under action of an ultrasound load are found; the influence of the amplitude, frequency, and time of applying the ultrasonic load is determined. It is shown that there is a frequency at which the deformation of the material is maximal.
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