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@article{Xu:2016:4/045007,
author = {Xu, Y and Balint, DB and Dini, DD},
doi = {4/045007},
journal = {Modelling and Simulation in Materials Science and Engineering},
title = {A method of coupling discrete dislocation plasticity to the crystal plasticity finite element method},
url = {http://dx.doi.org/10.1088/0965-0393/24/4/045007},
volume = {24},
year = {2016}
}
TY - JOUR
AB - A method of concurrent coupling of planar discrete dislocation plasticity (DDP) and a crystal plasticityfinite element (CPFE) method was devised for simulating plastic deformation in large polycrystals withdiscrete dislocation resolution in a single grain or cluster of grains for computational efficiency;computation time using the coupling method can be reduced by an order of magnitude compared toDDP. The method is based on an iterative scheme initiated by a sub-model calculation, which ensuresdisplacement and traction compatibility at all nodes at the interface between the DDP and CPFEdomains. The proposed coupling approach is demonstrated using two plane strain problems: (i)uniaxial tension of a bi-crystal film and (ii) indentation of a thin film on a substrate. The latter was alsoused to demonstrate that the rigid substrate assumption used in earlier discrete dislocation plasticitystudies is inadequate for indentation depths that are large compared to the film thickness, i.e. theeffect of the plastic substrate modelled using CPFE becomes important. The coupling method can beused to study a wider range of indentation depths than previously possible using DDP alone, withoutsacrificing the indentation size effect regime captured by DDP. The method is general and can beapplied to any problem where finer resolution of dislocation mediated plasticity is required to studythe mechanical response of polycrystalline materials, e.g. to capture size effects locally within a largerelastic/plastic boundary value problem.
AU - Xu,Y
AU - Balint,DB
AU - Dini,DD
DO - 4/045007
PY - 2016///
SN - 1361-651X
TI - A method of coupling discrete dislocation plasticity to the crystal plasticity finite element method
T2 - Modelling and Simulation in Materials Science and Engineering
UR - http://dx.doi.org/10.1088/0965-0393/24/4/045007
UR - http://hdl.handle.net/10044/1/28820
VL - 24
ER -