Coarse-grained model for spring friction study of micron-scale iron by smoothed particle hydrodynamics

¹ Graduate School of Simulation Studies, University of Hyogo - Kobe, Hyogo 650-0047, Japan
² Mitsubishi Heavy Industries, Ltd. - 2-1-1 Arai- cho Shinhama, Takasago, Hyogo 676-8686, Japan
³ Faculty of Engineering, Tokyo City University - 1-28-1 Tamazutsumi, Setagaya, Tokyo 158-8557, Japan
⁴ Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University - 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245, Japan

^(a) levansang82@gmail.com
^(b) h@washizu.org

Received: 30 November 2017
Accepted: 22 May 2018

Abstract

The paper presents the construction of a coarse-grained model to investigate dry sliding friction of the body-centered-cubic Fe micron-scale system by smoothed particle hydrodynamics simulations and examines influences of the spring force on the characters of friction. The atoms Fe system is coarse-grained into the two different simple-cubic particle systems, one of 432000 and the other of 16000 particles. From the detection of stick-slip motion, friction coefficient, dependence of friction coefficient on isotropy or anisotropy of the spring force and externally applied normal load, we find that the coarse-grained model is a reasonable modeling process for the study of the friction of the Fe system, and the anisotropic behavior presents better friction of the system than the isotropic one.