Consistent Energy-Based Atomistic/Continuum Coupling For Two-Body Potentials In Three Dimensions

Very few works exist to date on development of a consistent energy-based coupling of atomistic and continuum models of materials in more than one dimension. The difficulty in constructing such a coupling consists in defining a coupled energy whose minimizers are free from uncontrollable errors on the atomistic/continuum interface. In this paper a consistent coupling in three dimensions is proposed. The main achievement of this work is in identifying and efficiently treating a modified Cauchy-Born continuum model which can be coupled to the exact atomistic model. The convergence and stability of the method is confirmed with numerical tests.


Published in:
Siam Journal On Scientific Computing, 34, 3, B335-B360
Year:
2012
Publisher:
Philadelphia, Siam Publications
ISSN:
1064-8275
Keywords:
Laboratories:




 Record created 2013-02-27, last modified 2018-03-17


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