We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Concurrent multiscale modeling of amorphous materials in 3D.
- Authors
Su, Z. C.; Tan, V. B. C.; Tay, T. E.
- Abstract
SUMMARY A general three-dimensional concurrent multiscale modeling approach is developed for amorphous materials. The material is first constructed as a tessellation of hexahedral amorphous cells. For regions of linear deformation, the number of degrees of freedom is reduced by computing the displacements of the vertices of the amorphous cells only instead of the atoms within. This is achieved by determining, a priori, the atom displacements within such pseudoamorphous cells associated with orthogonal deformation modes of the cell. Actual atom displacements are calculated using traditional molecular mechanics for regions of nonlinear deformation. Computational implementation of the coupling between pseudoamorphous cells and molecular mechanics regions and stiffness matrix formulation are elucidated. Multiscale simulations of nanoindentation on polymer and crystalline substrates show good agreement with pure molecular mechanics simulations. Copyright © 2012 John Wiley & Sons, Ltd.
- Publication
International Journal for Numerical Methods in Engineering, 2012, Vol 92, Issue 13, p1081
- ISSN
0029-5981
- Publication type
Article
- DOI
10.1002/nme.4369