In this study, the tension-compression asymmetry in stress-strain curve on a nanocrystal Nickel is modeled implementing molecular dynamics simulations. The atomic positions, velocities, and intermolecular forces for each time step are obtained by solving Newton equations of motion in molecular dynamics code. The temperature of system is kept constant by the rescaling thermostat during the simulation. Initially, a solid FCC nickel nanocrystal with a square cross-section is considered. The infinitely long nickel nanocrystal is modeled by applying periodic boundary conditions in the [1 0 0] direction. In order to start the simulation, it is needed the system to be relaxed at a known temperature using constant pressure algorithm for duration of 420 ps.

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