Interpretation of shock-wave data for beryllium and uranium with an elastic-viscoplastic constitutive model

Journal Article · Sat Aug 01 00:00:00 EDT 1981 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.329458· OSTI ID:6346765

Steinberg, D J; Sharp, Jr, R W

We have developed a new elastic-viscoplastic constitutive model for metals which can easily be incorporated into a one-dimensional Lagrangian hydrodynamic computer code. Rather than the usual constant relaxation time, we have used one which is a function of temperature (i.e., thermal energy) and strain rate. This allows us to successfully calculate shock-wave profiles, including the effect of spall, in beryllium and uranium over a wide range of stress, temperature, strain, and strain rate.

• Research Organization: University of California, Lawrence Livermore National Laboratory, Livermore, California
• OSTI ID: 6346765
• Journal Information: J. Appl. Phys.; (United States), Vol. 52:8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BERYLLIUM
ELASTICITY
SHOCK WAVES
URANIUM
COMPUTER CODES
HYDRODYNAMICS
LAGRANGE EQUATIONS
MATHEMATICAL MODELS
METALS
ONE-DIMENSIONAL CALCULATIONS
PLASTICITY
RELAXATION
SPALLATION
SPATIAL DISTRIBUTION
STRAINS
TEMPERATURE DEPENDENCE
THEORETICAL DATA
VISCOSITY
ACTINIDES
ALKALINE EARTH METALS
DATA
DIFFERENTIAL EQUATIONS
DISTRIBUTION
ELEMENTS
EQUATIONS
FLUID MECHANICS
INFORMATION
MECHANICAL PROPERTIES
MECHANICS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTIAL DIFFERENTIAL EQUATIONS
TENSILE PROPERTIES
360103* - Metals & Alloys- Mechanical Properties