Journal article
A bridging domain method for coupling continua with molecular dynamics
Computer methods in applied mechanics and engineering, Vol.193(17), pp.1645-1669
2004
DOI: 10.1016/j.cma.2003.12.053
Abstract
A bridging domain method for coupling continuum models with molecular models is described. In this method, the continuum and molecular domains are overlapped in a bridging subdomain, where the Hamiltonian is taken to be a linear combination of the continuum and molecular Hamiltonians. We enforce the compatibility in the bridging domain by Lagrange multipliers or by the augmented Lagrangian method. An explicit algorithm for dynamic solutions is developed. Results show that this multiscale method can avoid spurious wave reflections at the molecular/continuum interface without any additional filtering procedures, even for problems with significant nonlinearities. The method is also shown to naturally handle the coupling of the continuum energy equation with the molecular subdomain. A multiple-time-step algorithm is also developed within this framework.
Details
- Title: Subtitle
- A bridging domain method for coupling continua with molecular dynamics
- Creators
- S.P Xiao - Department of Mechanical and Industrial Engineering and Center for Computer-Aided Design, 3131 Seamans Center, University of Iowa, Iowa City, IA 52242, USAT Belytschko - Department of Mechanical Engineering, 2145 N Sheridan Road, Northwestern University, Evanston, IL 60208-3111, USA
- Resource Type
- Journal article
- Publication Details
- Computer methods in applied mechanics and engineering, Vol.193(17), pp.1645-1669
- Publisher
- Elsevier B.V
- DOI
- 10.1016/j.cma.2003.12.053
- ISSN
- 0045-7825
- eISSN
- 1879-2138
- Language
- English
- Date published
- 2004
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064235202771
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