An adaptive multiscale method for quasi-static crack growth
作者： Pattabhi R Budarapu , Robert Gracie , Stéphane PA Bordas , Timon Rabczuk , None
DOI: 10.1007/S00466-013-0952-6
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摘要: This paper proposes an adaptive atomistic- continuum numerical method for quasi-static crack growth. The phantom node is used to model the in region and a molecular statics near tip. To ensure self-consistency bulk, virtual atom cluster material of coarse scale. coupling between scale fine realized through ghost atoms. positions are interpolated from solution enforced as boundary conditions on adaptively enlarged propagates behind tip coarsened. An energy criterion detect location. triangular lattice corresponds structure (111) plane FCC crystal. Lennard-Jones potential atom---atom interactions. implemented two dimensions. results compared pure atomistic simulations; they show excellent agreement.
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