703 ナノ結晶構造体の強度と粒運動に関する分子動力学的研究

概要

論文の詳細を見る
Nano-crystalline structure generated from copper atomic clusters by artificially arranging in regular configuration is studied by molecular dynamics simulation based on EMT potential. We pay particular attention to relation between structural morphology and strength and relation between grain motion and strength. A copper cluster of 683 atoms (0-dimension) and its duplicated and assembled products expanding in 1-, 2-, 3-dimensions are subjected to uniform tensile loading. Maximum stress is obtained for each dimensional models, where the order of values are as 0>1>3>2-dimentions. Especially in 2-dimensional structure, calculation model with initial voids exhibits larger grain motion including both translation and rotation, which leads to relaxation of stress concentration inherent in grain boundary (cluster boundary region).
一般社団法人日本機械学会の論文