Dislocation Based Mechanics: the various contributions of Dislocation Dynamics simulations

Abstract: Plastic deformation In crystalline materials is controlled by the motion and interactions of dislocations [AND 17]. Discrete Dislocation Dynamics (DDD) simulations have now existed for about 25 years to investigate plastic flow at the mesoscale, which lies at a critical position between two very different scales. At small scale, atomistic simulations are particularly adapted to investigate the core structure or mobility of individual dislocations, while continuous approaches can simulate the complete and continuous mechanical behaviour at the scale of the components. the purpose of DDD is to simulate the evolution of large dislocation ensembles in reaction to an external load and to assess the collective behaviour of dislocations.