Plastic flow in close-packed crystals via nonequilibrium molecular dynamics

Journal Article · Mon Aug 15 04:00:00 EDT 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.28.1756· OSTI ID:5807815

Ladd, A J.C.; Hoover, W G

The measurement of plastic-wave profiles in strong shock waves suggests a power-law dependence of the solid-phase shear stress on strain rate. The strain rates in these experiments vary from about 10 kHz to 0.1 GHz. We have carried out molecular-dynamics simulations of steady-state plastic flow in two- and three-dimensional close-packed crystals, using recently developed ''nonequilibrium'' equations of motion to maintain a constant strain rate and temperature. These calculations appear to be consistent with current experimental data and suggest that the flow of close-packed metals is described by a single physical mechanism over a range of strain rates from 10 kHz to 1 THz.

• Research Organization: Department of Applied Science, University of California at Davis, Davis, California 95616
• OSTI ID: 5807815
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 28:4; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656000* -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUETTE FLOW
CRYSTALS
DIFFERENTIAL EQUATIONS
EQUATIONS
EQUATIONS OF MOTION
FLUID FLOW
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 100-1000
KHZ RANGE
MECHANICAL PROPERTIES
MHZ RANGE
PARTIAL DIFFERENTIAL EQUATIONS
PLASTICITY
SHOCK WAVES
SIMULATION
STRAIN RATE
THREE-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL CALCULATIONS
VISCOUS FLOW