513 SPHを組み入れた分子動力学法によるナノ界面の強度評価(OS-3 分子動力学法,研究発表講演)

概要

論文の詳細を見る
A concurrent simulation of molecular dynamics (MD) and smoothed particle hydrodynamics (SPH) is proposed by means of a force bridging method. Numerical test is performed on aluminum crystalline model with planar defect. 1980 MD particles with Σ=5 symmetrical tilt grain boundary structure are inserted into two SPH regions composed of 1960 particles. Shear and tensile loadings are applied to the model. In shearing, maximum stress occurring in MD region is comparable to that in full MD simulation. Amount of grain boundary migration also agrees with that obtained in full MD. On the other hand, in tension, fracture unexpectedly occurs in surrounding SPH region. This is supposed to be due to tensile instability which SPH should confront.
一般社団法人日本機械学会の論文
2005-03-18