Dislocation dynamics simulations in the presence of interacting cracks

Article Abstract:

Research was conducted to examine a computer simulation technique based on dislocation dynamics for the investigation of the movement of dislocations in the presence of multiple cracks. dislocation distribution and strain rate results and dislocation structures are provided as functions of applied stresses for various microcrack orientations and positions. Results provide a reasonable description of dislocation pattern development during deformation around the cracks and offer an explanation for the development and shape of the plastic zone.

Usage, Computer simulation

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Laser-induced deformation patterns in thin films and surfaces

Article Abstract:

Research was conducted to examine the laser induced deformation of unsupported or weakly adherent thin films in the framework of a simple dynamical model for the interacting vacancy density and deformation fields of the film. Results demonstrate that one-dimensional gratings are always unstable in isotropic systems. In irradiation with focused laser beams, rose deformation patterns naturally arise in the model, which is in qualitative agreement with experimental observations.

Thin films

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Elastic interaction of defects on crystal surfaces

Article Abstract:

Research was conducted to examine the elastic field and the interaction energy associated with surface steps and adatoms. A harmonic model is proposed that presents a number of considerable advantages when compared to continuum models of Embedded Atom Method (EAM) simulations. Results are in good agreement with atomic EAM simulation results as well as the far-field predictions of continuum elastic theory.

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