The Flow Of Dislocation And Evolution Of Self-lock Dislocation In Multi-slip System Continuum Dynamics

Based on the theory of continuum dislocation dynamic,the dynamic evolution scheme of flowing dislocations is derived in this paper.The scheme can accurately reflect the changing trend of convection direction when dislocations flow,thus getting rid of the lack of details of the traditional solid grid for the change of dislocation geometric characteristics.At the same time,based on the characteristics of the grid formed by the straight edge dislocations in the two-dimensional asymmetric slip system,the short-range interaction between the twodimensional Lomer lock and the Hirth lock is described by the rotation of the tensor function,and the evolution equations of different dislocations in the lock describing the periodic distribution are established.In this paper,the traditional dislocation continuum theory and the internal interaction of dislocation locks with reactive stacking properties are connected by the following three aspects:(1)introducing the ratio of the number of dislocations in a cell to the average distance of dislocations in different slip systems,more abundant information about local configuration of dislocations can be obtained;(2)The conditions for the formation and dissociation of dislocations are introduced,and the evolution equation is added to describe the evolution of dislocations in dislocation lock;(3)The average velocity of dislocation movement in different slip systems is introduced,and the relationship between the average velocity and the field variables of the distribution characteristics of micro cell dislocation is gradually determined by discrete numerical simulation.The neural network is used to fit the multivariable effect.In this paper,it can be found that the formation dissociation conditions of different dislocation locks are related to the types and distribution characteristics of dislocations in the lock.Compared with the traditional Taylor type formula,the unlocking stress has more characteristics which not only based on the dislocation density,thus the dynamic corresponding relationship of one or more step characteristics for dislocation lock is obtained.The work of this paper is to improve the microscopic characteristics of multi slip system dislocations which reflect the inhomogeneous deformation in the plastic region,and to supply more criteria for the existing dislocation continuum dynamic theory.The established theory can also reflect the influence of the plastic flow of crystal with different properties in all directions on the deformation of materials.In this paper,the collection of dislocation micro quantity and dynamic modeling of micro unit cell in materials,as well as the corresponding relationship between machine learning generation and macro average velocity field,can provide reference for the study of more similar macro mechanical models with micro evolution mechanism.