Reference : Coarsen Graining: A Renewal Concept of Efficient Adaptivity Techniques for Multiscale...
Scientific journals : Article
Engineering, computing & technology : Mechanical engineering
Computational Sciences
http://hdl.handle.net/10993/13939
Coarsen Graining: A Renewal Concept of Efficient Adaptivity Techniques for Multiscale Models
English
Shih-Wei, Yang mailto [Institute of Structural Mechanics > Bauhaus University of Weimar]
Pattabhi Ramaiah, Budarapu mailto [Institute of Structural Mechanics > Bauhaus University of Weimar]
Roy Mahapatra, Debiprasad [Indian Institute of Science, Bangalore > Department of Aerospace Engineering]
Bordas, Stéphane mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Pierre, Kerfriden [Cardiff University > Institute of Mechanics and Advanced Materials]
Timon, Rabczuk mailto [> >]
Undated
Computer Methods in Applied Mechanics & Engineering
Yes
International
[en] DRKP ; Meshless methods ; multiscale
[en] This paper presents a multiscale method for the quasi-static crack propagation. The coarse
region is modeled by the di erential reproducing kernel particle(DRKP) method. The coupling
between the coarse scale and ne scale is realized through ghost atoms. The ghost atoms
positions are interpolated from the coarse scale solution and enforced as boundary conditions
on the ne scale. The ne scale region is adaptively enlarged as the crack propagates and the
region behind the crack tip is adaptively coarsened. The centro symmetry parameter(CSP) is
used to detect the crack tip location. The triangular lattice corresponds to the lattice structure
of the (111) plane of an FCC crystal in the ne scale region. The Lennard-Jones potential is
used to model the atom-atom interactions. The method is implemented in two dimensions. The
results are compared to pure atomistic simulations and show excellent agreement.
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/13939

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