TY - JOUR
T1 - Blended Ghost Force Correction Method for 3D Crystalline Defects
AU - Fang , Lidong
AU - Zhang , Lei
JO - Communications in Computational Physics
VL - 4
SP - 1246
EP - 1272
PY - 2021
DA - 2021/02
SN - 29
DO - http://doi.org/10.4208/cicp.OA-2020-0107
UR - https://global-sci.org/intro/article_detail/cicp/18650.html
KW - Multiscale computational method, atomistic/continuum coupling, crystalline defects, blending method, ghost force correction, many-body interaction potential.
AB - <p style="text-align: justify;">Atomistic/continuum coupling method is a class of multiscale computational method for the efficient simulation of crystalline defects. The recently developed blended ghost force correction (BGFC) method combines the efficiency of blending methods and the accuracy of quasi-nonlocal (QNL) type methods. BGFC method
can be applied to multi-body interaction potentials and general interfaces. In this paper, we present the formulation, implementation and analysis of the BGFC method in
three dimensions. In particular, we focus on the difference and connection with other
blending variants, such as energy based blended quasi-continuum method (BQCE)
and force based blended quasi-continuum method (BQCF). The theoretical results are
justified by a few benchmark numerical experiments with point defects and microcrack in the three dimensional face-centered cubic (FCC) lattice.</p>