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Nanoindentation experiments are an excellent probe of micromechanical properties, but their interpretation is complicated by the multiple length scales involved. We report simulations of silicon nanoindentation, based on an extended version of the local quasicontinuum model, capable of handling complex crystal structures. This method embeds an interatomic force law within a finite element framework...
The Kocks-Mecking hybrid model for polycrystal deformation has been developed further, in order to obtain an easy definition of polycrystalline behaviour, from knowledge of the single crystal stress-strain curves. The hybrid model is a one-parameter theory that considers the flow stress governed by total dislocation density. This is the addition of the statistically stored dislocations, independent...
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