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    A Coupling Atomistic-continuum Approach for Modeling Dislocation in Plastic Behavior of Nano-structures

    , M.Sc. Thesis Sharif University of Technology Omrani Pournava, Amir Mohsen (Author) ; Khoei, Amir Reza (Supervisor) ; Jahanshahi, Mohsan (Co-Advisor)
    Abstract
    In this study, a novel multi-scale hierarchical method has been employed to explore the role of edge dislocation on Nano-plates with hexagonal atomic structure in large deformation. multiscale hierarchical atomistic/molecular dynamics (MD) finite element (FE) coupling methods are proposed to demonstrate the impact of dislocation on mechanical properties of Magnesium in large deformation. The atomic nonlinear elastic parameters are attained via computing first-order derivation of stress with respect to strain of Representative Volume Element (RVE). To associate between atomistic and continuum level, the mechanical characteristics are captured in the atomistic scale and transferred to the...