Plastic deformation under high-rate loading: The multiscale approach

Krasnikov, Vasiliy S.; Kuksin, A. Yu.; Mayer, Alexander E.; Yanilkin, A. V.

doi:10.1134/s1063783410070115

Cited by 60 publications

(35 citation statements)

References 16 publications

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“…[1][2][3][4][5][6][7][8][9][10][11][12] In this regard, shock-wave studies of the dynamic yielding and fracture of single crystals occupy a special place, since they allow the separation of contributions of different mechanisms of nucleation and the growth of plastic deformation and fracture and such experiments are useful for verifying molecular dynamic simulations. During recent decades, shock-wave studies of the dynamic yielding and fracture of metal single crystals have been performed on face-centered cubic (fcc) metals; such as copper [13][14][15][16] and aluminum, [17][18][19][20] body-centered cubic (bcc) metals, such as molybdenum; 21 and hexagonal close-packed (hcp) metals, such as beryllium 22 and zinc.…”

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confidence: 99%

Shock response of magnesium single crystals at normal and elevated temperatures

Kanel

Garkushin

Савиных

et al. 2014

Journal of Applied Physics

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Strength and elastic deformation of natural and synthetic diamond crystals shock compressed along [100] J.A series of magnesium single crystals, from 0.2 to 3 mm thick, were shock loaded in directions parallel and perpendicular to the c-axis of the hexagonal closed packed (hcp) structure and at 45 to the c-axis. Shock compression along the c-axis is associated with the largest Hugoniot elastic limit (HEL) for this material. Microscopic observation of recovered c-cut samples demonstrated intense twinning with a greater density of twins near the impact surface. The low-energy basal slip was activated by shock loading along the inclined direction and has the smallest HEL. In all cases, we observe the decay of the elastic precursor wave and growth of the HEL with increasing temperature. For the inclined shock compression after the HEL, two plastic waves were found where the stress level of the first plastic wave depends on the peak shock stress. Finally, the largest spall strength was along the transversal direction and the smallest in the off-axis direction. The fracture surface of the sample of transversal orientation contains numerous groves oriented along the base planes of the crystals. V C 2014 AIP Publishing LLC. [http://dx.

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confidence: 99%

Shock response of magnesium single crystals at normal and elevated temperatures

Kanel

Garkushin

Савиных

et al. 2014

Journal of Applied Physics

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“…We will describe the dislocation plasticity inside grains using the laws of hardening (1)- (3) in combination with the model of dislocation plasticity proposed in [48,49]. The model allows one to adequately describe the high rate plastic deforma tion for most of coarse grained metals [49].…”

Section: Study Of the Strength Properties Of Nanocrystalline Metals Imentioning

confidence: 99%

Yield strength of nanocrystalline materials under high-rate plastic deformation

Mayer

2012

Phys. Solid State

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A high rate plastic deformation of fine grained materials has been considered as a result of com peting processes of dislocation gliding in the grains and grain boundary sliding. A structural model has been proposed for describing the grain boundary sliding as a dominant mechanism of plasticity of nanocrystalline metals. The dependence of the yield strength on the material properties, temperature, and deformation rate has been studied numerically. For the adequate description of the experimental data and molecular dynamics calculations, it is necessary to take into account two parameters, namely, the barrier stress, which is depen dent on the elastic constants of a material, and the boundary viscosity, which is substantially dependent on temperature.

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“…The principle of accounting for deformation mechanisms at different structural levels has been more consistently implemented [161,162]. Here a three-level model has been formulated.…”

Section: Multilevel Modelsmentioning

confidence: 99%

Deformation models under intense dynamic loading (Review)

Merzhievskii

2015

Combust Explos Shock Waves

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This paper considers currently available models of irreversible deformation processes of materials under dynamic, in particular shock-wave, loading. The models can be divided into three groups: (1) macroscopic (continuum) models-traditional models of continuum mechanics, primarily classical models of elastic-plastic deformation, their various generalizations to the case of dynamic processes and models of viscoelastic relaxation media; (2) microstructural models based on the description of microstructural mechanisms of irreversible deformation (usually, the concept of the kinetics of a dislocation ensemble); (3) atomistic molecular dynamics models and calculations. A special category includes the most promising (from the point of view of the author) multilevel models which combine the advantages of each of these approaches and consider deformation mechanisms of various levels. Examples of calculations using such models are presented.

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Plastic deformation under high-rate loading: The multiscale approach

Cited by 60 publications

References 16 publications

Shock response of magnesium single crystals at normal and elevated temperatures

Shock response of magnesium single crystals at normal and elevated temperatures

Yield strength of nanocrystalline materials under high-rate plastic deformation

Deformation models under intense dynamic loading (Review)

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