Dislocation glide through non-randomly distributed point obstacles

摘要: Abstract Classical meso-scale models for dislocation–obstacle interactions have, by and large, assumed a random distribution of obstacles on the glide plane. While good approximation in many situations, this does not represent materials where are clustered In work, we have investigated statistical problem dislocation sampling set point plane using modified areal-glide model. The results these simulations show two clear regimes. For weak obstacles, spatial matter critically resolved shear stress is found to be independent degree clustering. contrast, above critical obstacle strength determined clustering, becomes constant. It shown that behaviour can explained semi-analytically considering probability interaction between line at given level stress. consequenc...