Molecular Dynamics Simulation of Micro Mechanisms in Slip Deformation Theory of Crystals |
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Authors: | T. Inamura K. Yamada |
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Affiliation: | a Nagoya Institute of Technology, Gokiso-cho, Showa-ku, NAGOYA 466-8555, JAPAN |
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Abstract: | Based on the discussion that there should be a micromechanism that causes a macroscopic slip of mono-crystal copper, molecular dynamics simulations with the analytical displacement feld around a crack tip have been carried out. The result of the simulation shows that macroscopic shear slip in an f.c.c. mono-crystal copper occurs as discrete time events. This is because cross-slips occur in many places in a material such that a macroscopic shear slip is blocked until some critical state of deformation. A macroscopic shear slip then occurs suddenly at the critical state in which the area of disordered atomic arrangement has stretched from one end of a crystal to the other end. The reason why macroscopic shear slips occur in the directions of the slip planes of a crystal is attributed to the fact that the areas of disordered atomic arrangement develop only along those directions. |
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Keywords: | Simulation Microcutting Single crystal |
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