Model of the kinetics of metal plastic deformation under shock-wave loading conditions

ABSTRACTThe work presented is devoted to study the mechanisms and kinetics of plastic deformation of bcc and fcc metals and alloys under shock-wave loading (strain rates > 105 s-1). To study the behavior of metals under conditions described the two scale approach is developed. It comprises molecular dynamics (MD) calculations of dislocation mobility and dislocations nucleation rate and continuum mechanics model with equations for description of elastoplastic deformation, kinetics and dynamics of dislocations.Dislocation velocities as functions of applied shear stress are calculated from MD in a wide temperature range up to the melting point. Velocity-dependent drag coefficient is introduced to approximate the data obtained.The influence of Guinier–Preston (GP) zones on dislocation motion is analyzed. The results obtained are used to evaluate temperature dependence of dynamic flow stress and the evolution of dislocations subsystem under shock loading. Data on the attenuation of the elastic precursor and rare surface velocity profiles calculated for Al are in good agreement with the experiments. Simulation of the free surface velocity profiles during shock-wave loading of AlCu alloys is carried out.

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Kinetics of Phase Transitions Induced by Shock-Wave Loading in Ice

The Journal of Physical Chemistry B ◽

10.1021/jp9631691 ◽

1997 ◽

Vol 101 (32) ◽

pp. 6215-6218 ◽

Cited By ~ 12

Author(s):

Vladimir Tchijov ◽

Jaime Keller ◽

Suemi Rodríguez-Romo ◽

Oleg Nagornov

Keyword(s):

Shock Wave ◽

Phase Transitions ◽

Shock Wave Loading ◽

Wave Loading ◽

Kinetics Of Phase Transitions ◽

Kinetics Of

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Investigation of the mechanical properties of organoplastic under shock wave loading conditions

Journal of Physics Conference Series ◽

10.1088/1742-6596/991/1/012013 ◽

2018 ◽

Vol 991 ◽

pp. 012013 ◽

Cited By ~ 1

Author(s):

A M Bragov ◽

L A Igumnov ◽

A Yu Konstantinov ◽

A K Lomunov

Keyword(s):

Mechanical Properties ◽

Shock Wave ◽

Shock Wave Loading ◽

Loading Conditions ◽

Wave Loading

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Compaction model validation under non-planar shock wave loading conditions

10.1063/12.0000980 ◽

2020 ◽

Author(s):

T. J. Voorhees ◽

M. S. Freeman ◽

C. L. Rousculp ◽

D. A. Fredenburg ◽

T. C. Carney ◽

...

Keyword(s):

Shock Wave ◽

Model Validation ◽

Shock Wave Loading ◽

Loading Conditions ◽

Wave Loading ◽

Planar Shock ◽

Planar Shock Wave

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The Resistance of Structural Elements to Impact and Shock-Wave Load

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.715.216 ◽

2016 ◽

Vol 715 ◽

pp. 216-221 ◽

Cited By ~ 1

Author(s):

Leopold Kruszka ◽

Iurii Vorobiov ◽

Nataliia Ovcharova

Keyword(s):

Shock Wave ◽

Plastic Deformation ◽

Strain State ◽

Dynamic Stress ◽

Shock Wave Loading ◽

Structural Elements ◽

Wave Loading ◽

Wave Load ◽

Deformation And Fracture ◽

Structure Strength

The ability of structural elements withstanding impact and shock-wave loading has been considered. The dynamic stress-strain state of structural elements at the stage of occurrence of large elastic-plastic deformation and fracture has been investigated, and different criteria of the structure strength has been used. The numerical and experimental results have been compared.

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