New discrete dislocation algorithms in plastic deformation and its application to rate effect, creep and fracture

• Online Access: http://hdl.handle.net/2047/D20239916

Given that thermal activation and climb of dislocation contribute significantly to high temperature plastic behavior, creep and fracture, a thorough understanding of dislocation motion is extremely critical. A new discrete dislocation model is presented to solve the three: (i) the time scale gap between dislocation glide and other thermal process, (ii) plastic deformation when dislocation lines are thermally activated over an obstacle field and (iii) dislocation climb due to the vacancy diffusion at a wide range of time scale.