COMPUTER-SIMULATION OF NONACTIVATED DISLOCATION-MOTION THROUGH COMPLEX ENSEMBLES OF FOREST DISLOCATIONS AND POINT OBSTACLES

Computer simulation methods are applied to NaCl crystals to study the processes of motion of slip dislocations through complex ensembles of forest dislocations and point obstacles taking into account the fine structure of the long-range fields of internal stresses. Characteristic intervals of the relative concentration of forest dislocations are found to exist in the complex ensemble, where various types of obstacles produce predominant influence upon the features of the motion of slip dislocations through complex ensembles. It is shown that the squared value of the total stress of the slip dislocation motion through complex ensembles best complies with the sum of squared stresses of slip dislocation motion through the single-component ensembles incorporated in the complex ones.