Mesh refinement schemes for the concurrent atomistic-continuum method

摘要: Abstract Most concurrent multiscale methods that employ domain decomposition divide the simulation into atomistic and continuum subdomains such nanoscale defects are described at resolution while a treatment is employed elsewhere. An example atomistic-continuum (CAC) method. While dislocations can nucleate migrate in CAC, they restricted to prescribed slip planes along interelement boundaries. In this paper, we extend original CAC method by implementing mesh refinement schemes straightforward manner accommodate 3-D dislocation network curved migration. results validated comparing their equivalent fully simulations. Augmented with an adaptive scheme, brittle-to-ductile transition dynamic fracture response of single crystalline FCC Cu accurately predicted using Differing from most methods, complexity geometric topologies during avoided approach because does not require compatibility. The extended expected apply modeling more complex activities materials up μ m scale.