Deformation of atomic models and their equivalent continuum counterparts using Eringen's two-phase local/nonlocal model


Tuna Eroğlu M., Kırca M., Trovalusci P.

MECHANICS RESEARCH COMMUNICATIONS, vol.97, pp.26-32, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 97
  • Publication Date: 2019
  • Doi Number: 10.1016/j.mechrescom.2019.04.004
  • Journal Name: MECHANICS RESEARCH COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.26-32
  • Keywords: Two-phase local/nonlocal model, Eringen, Atomic array, Finite element method, NONLOCAL INTEGRAL MODEL, EULER-BERNOULLI, ELASTICITY, VIBRATION, FORMULATION, GRADIENT
  • Istanbul Technical University Affiliated: Yes

Abstract

The aim of this contribution is to formulate equivalent continuum finite element model for two-dimensional atomic arrays under plane-stress condition, based on Eringen's two phase local/nonlocal model. The interaction between the atoms is modelled using translational and rotational linear elastic springs including both nearest and second nearest neighbor relations. Explicit relations between those set of springs and material properties of associated continuum model is looked for by means of equivalency of potential energy stored in atomic bonds and strain energy of continuum. Possibility of reducing computational burden of full atomic models by equivalent continuum models is discussed. This study may be regarded as the first step in composing a partitioned-domain multiscale model; with possibly smoother transition between coarse and fine scales due to the ability of nonlocal continuum model in incorporating long-range interactions. (C) 2019 Elsevier Ltd. All rights reserved.