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Showing 1 to 8 of 8 for “"Shear localization"”.
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Shear localization in viscoplastic solids
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Large plastic deformation and shear localization of crystals
Bibliography: leaves 87-94.
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Modeling the mechanical behavior of amorphous metals by shear transformation zone dynamics
… proposed. The modeling framework considers the shear transformation zone (STZ) as the fundamental unit of deformation, and coarse-grains an amorphous collection of atoms into an ensemble of STZs on a mesh. By employing finite element analysis and a kinetic Monte Carlo algorithm, the modeling …
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Nanostructure stabilization and mechanical behavior of binary nanocrystalline alloys
… as a consequence of a shift to glass-like shear localization. In light of this finding, we study the Hall-Petch breakdown at high strain rates, and show that an "inverse Hall-Petch" weakening regime emerges at high rates. Additional effects from structural relaxation are investigated, and …
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Microstructure design of mechanically alloyed materials
… compacts suggest that this alloy deforms by shear localization. The penetration performance of this alloy is explored in sub-scale ballistic tests into concrete targets, and is found to be at least as good as current state-of-the-art penetrator materials.
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Localization and instability in sheared granular materials: role of friction and vibration
Shear banding and stick-slip instabilities have been long observed in sheared granular materials. Yet, their microscopic underpinnings, interdependencies and variability under different loading conditions have not been fully explored. Here, we use a non-equilibrium thermodynamics model, the Shear …
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Modeling of sheet metal fracture for shell finite elements with component level validation
… of a finite element model. A general shape of a localization locus that demarcates DSSE for proportional membrane loading is identified through a Marciniak-Kuczynski type localization analysis. The locus is successfully fitted by a mathematical form of the HC model, and a model parameter is …
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The rheological complexity of waxy crude oils : yielding, thixotropy and shear heterogeneities
… The three phenomena studied are, first: shear heterogeneities, i.e. the manifestation of wall slip, shear banding or other shear-localization events under imposed deformations that are assumed to be homogenous. For these purposes, flow visualization techniques capable of "Rheo-PIV" …