Motion of dislocations through ensembles of forest dislocations and point obstacles upon the simultaneous action of static and cyclic loads

Methods of computer simulation developed for hcp crystals were used to analyze the motion of gliding dislocations through composite ensembles of points obstacles and vibrating forest dislocations. It is shown that the possibility for forest dislocations to suffer forced vibrations increases the transparency of a composite ensemble. It was established that as the amplitude of dislocation vibrations reaches a certain limit depending on the strength of point obstacles, such obstacles in a composite ensemble almost completely lose their ability to hinder the motion of gliding dislocations.