Steady Motion of a Dislocation in a Lattice

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概要

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• Athermal motion of a dislocation in a lattice is studied. Using Nabarro force which represents the anharmonicity of the potential in the slip plane, a formula which describes the energy dissipated from a moving dislocation is given. Results of computer simulations of a one-dimensional dislocation are analyzed by the formula. It is shown that there are three types of motion: (i) a dislocation emits lattice waves, (ii) the displacement field around a moving dislocation is almost the same as the static one, (iii) dislocation velocity changes remarkably in the period of the lattice parameter. The boundaries between velocities of these types of motion depend strongly on the shape of the potential and damping of lattice waves. The continuum approximation is justified for the second type of motion which appears if a lattice has large damping and the low Peierls stress.

• 社団法人日本物理学会の論文
• 1973-02-05

著者

• Ishioka Shunya

  Department Of Information Science Kanagawa University

関連論文

• Phonon Number Fluctuations in One-Dimensional Fermi-Pasta-Ulam Lattices
• Observation of Chaotic Attractor in Spatially Extended Systems : Coarse-Grained Dimension of Frozen Chaos
• A Stochastic Model of 1/f Phonon-Number Fluctuations
• Simulation of a Dripping Faucet
• Thermodynamic Entropy of Computer Devices
• A Theory of the Peierls Stress of a Screw Dislocation. II
• Dislocation Vibration : Effective Mass and Line Tension
• A Theory of the Peierls Stress of a Screw Dislocation. I
• Uniform Motion of a Screw Dislocation in a Lattice
• Steady Motion of a Dislocation in a Lattice

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