A knowledge of the Hugoniot of unreacted explosives is required to interpret transitional phenomena in explosives and to determine the shock sensitivity of explosives. The usual method employed to obtain the Hugoniot of a material is to perform a series of experiments which measure two of the following variables: shock velocity, particle velocity, pressure, and volume. However, there are drawbacks to this approach for porous (granular) explosives. Fortunately, computational methods have been...

Topics: DTIC Archive, Erkman, John O, NAVAL ORDNANCE LAB WHITE OAK MD, *EXPLOSIVES, *SHOCK TESTS, *TNT,...

In this report, we study the equilibrium and stability conditions of one-component charged gas using the Gibbs variational principles. We established the general equations allowing us to analyze the equilibrium conditions of the systems, which contain electrically charged constituents. For the sake of simplicity, technical transparency, and brevity, we limited ourselves to the systems containing the charges of a one sign. Our approach was based on the variational principles of Gibbs, which, in...

Topics: DTIC Archive, Grinfeld, Michael, US Army Research Laboratory Aberdeen Proving Ground United States,...

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Jan 4, 2020
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Eisenberg, David S

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xii, 296 pages 24 cm

Topics: Water, Water, 35.12 chemical thermodynamics, phase theory, 33.64 equations of state, phase...

The equilibrium vapor pressure of antimony triiodide (SbI3) has been measured over a temperature range from 20 to 47 C using a classical Knudsen cell method. An analysis of the slope of that data as a function of temperature yields an enthalpy of sublimation (Hvapor) value of Hvapor = 128.48 kJ/mol for SbI3.

Topics: DTIC Archive, Taylor, Patrick J, US Army Research Laboratory Adelphi United States, doping,...

This project aims to develop a novel three-stage coupled multi-scale QM-MD-SPH approach for modeling and simulation of complex heterogeneous multicomponent reactive systems, considering both high explosive (HE) explosion effects. The novelty of our approach is that the unified particle-based approaches couples the dynamic events over nine orders of magnitude length scales (nm-m) and twelve orders of magnitude timescales (ps-s). This is achieved by using ab initio quantum mechanics (QM)...

Topics: DTIC Archive, Liu,Guirong, University of Cincinnati Cincinnati United States, crystal structure,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

This report documents research performed to enable the EPIC 3D lagrangian hydrocode to run in a linked mode with the hull 3D Eulerian hydrocode. The linked mode is required to efficiently and accurately model multiple target plate impact and penetration events. The report also documents many changes made to make EPIC more user oriented and simple to run.

Topics: DTIC Archive, Osborn, John J, ORLANDO TECHNOLOGY INC SHALIMAR FL, *ARMOR PIERCING AMMUNITION,...

Two methods were investigated for approximating the speed of sound (using the Hugoniot or a compression ratio factor). Both methods were shown to have a high degree of accuracy at low pressures and correctly predict higher speeds of sound for the higher energy shocked states. The approximations of higher shock pressures diverge progressively greater at higher shock states. A relationship between the partial derivatives of the change in pressure to the change in volume along the Hugoniot to the...

Topics: DTIC Archive, Fuchs, Brian, ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY...

The Blast Load Simulator (BLS) at the U.S. Army Engineer Research and Development Center (ERDC) has been utilized for applying simulated blast loads on structures for more than a decade; however, the experimental efforts to date have not included a computational modeling component. The Defense Threat Reduction Agency tasked ERDC to conduct an integrated experimental/computational program to evaluate several first principles codes (FPCs) for modeling airblast environments typical of those...

Topics: DTIC Archive, Bessette,Gregory C, Army Engineer Research and Development Center Vicksburg, BLAST...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

A perturbation technique which is particularly well suited for high pressures is used to calculate thermodynamic properties for a simple liquid whose molecules interact via a Buckingham (exp-6) potential. There is good agreement between computations and experiments for moderate temperature isotherms for liquid nitrogen. A calculation of the shock Hugoniot of liquid nitrogen exhibits excellent agreement with experimental data. (Author)

Topics: DTIC Archive, Jones,Hermenzo D, NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD, *PERTURBATION...

This paper outlines a new simplified approach to developing a material model for adobe. The approach is to fit the equation of state (EOS) using a Mie-Gr neisen (MGR) analytical model with a P-Alpha compaction law, and to fit the pressure-dependent yield surface with the Geological Yield Surface (GEO) modeled in CTH using well characterized adobe. By identifying key parameters that governed material response, this simplified modeling approach aimed to increase the understanding of the shock...

Topics: DTIC Archive, Pena,Jeremy R, AIR UNIV MAXWELL AFB AL MAXWELL AFB United States, equations of state,...

Over the past few years RWME has been investigating the use of the liquid helium droplet beam technique to generate of single component and composite nanoclusters at low temperature, deposit the clusters onto various substrates, and then investigate the stability, chemical, and physical properties of the subsequent cluster-based material. This report provides an annual status update in the understanding of the environment of the clusters prior to, during, and after collision of the doped...

Topics: DTIC Archive, Ridge,Claron J, Munitions Directorate Eglin AFB United States, energetic materials,...

A reliable diagnostic/prognostic indicator for electrochemical systems would allow for the prediction of cell failures, a function that would improve battery safety, efficiency, and quality assurance. The technique of differential capacity has proven to be a useful tool in the pursuit of this type of diagnostic/prognostic device. The plots resulting from the differential capacity technique provide a fingerprint of a battery system that can be tracked throughout its life, and changes in these...

Topics: DTIC Archive, Marzocca,Lauren M, US Army RDECOM, Communications, Electronics, Research, Development...

According to the Kelvins formula paradox, a polarized body will be accelerated by its own electrostatic or magnetostatic field. This paradoxical statement obviously contradicts common sense and everyday experience, and should be eliminated from any rational theory of electromagnetism. We suggested a general approach allowing to get rid of this paradox. However, the approach leads to quite complex formulae. Needless to say, a simpler resolution of the paradox, if possible, would be highly...

Topics: DTIC Archive, Grinfeld,Michael, US Army Research Laboratory Aberdeen Proving Ground United States,...

A two-stage light gas gun incremental interior ballistic formalism is presented, along with a FORTRAN IV computer program that utilizes the system. Typical input and output data, both plotted and tabular, are included. A standard conventional gun ballistic analytic approach is coupled to a mathematical model of the light gas chamber. Correlations of the mathematical model and computer predictions to experimental device firings are demonstrated.

Topics: DTIC Archive, Heiney, Otto K, AIR FORCE ARMAMENT LAB EGLIN AFB FL, *INTERIOR BALLISTICS, *LIGHT GAS...

The general subroutine (TAMEOS) for generating thermodynamic equations of state for rock-water-void mixes has been used in the 1D SKIPPER code to predict the spherically symmetric ground motion for the Mine Dust HE test in partially saturated tuff. The pre-test calculations are in good agreement with the measured in situ stress and velocity time histories. Planar TAMEOS/SKIPPER parameter calculations are presented which demonstrate the need for explicit treatment of water vaporization in...

Topics: DTIC Archive, Riney, T D, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *GROUND MOTION, *ROCK...

This document contains reports on: (1) Energy of explosives, (2) Thermal decomposition of explosives, (3) Measurement of detonation properties, (4) Elementary theory of the plane detonation wave, (5) Application of theory to condensed explosives, (6) Structure of the plane detonation wave: finite reaction zone, (7) Detonation waves of cylindrical and spherical symmetry, (8) Thermal explosion, (9) Initiation of detonation by shock waves, (10) Initiation and growth of detonation from impact,...

Topics: DTIC Archive, ARMY MATERIEL COMMAND ALEXANDRIA VA, *EXPLOSIVES, COMPUTER PROGRAMS, DECOMPOSITION,...

In a previous memorandum (NOLM 10819), a method was developed to calculate the muzzle velocity and acceleration of a projectile in an idealized gun. It was shown that an accurate method is available and that, given the ratio of charge mass to projectile mass, G/M, the value of the excluded volume in the Abel equation of state, and the initial values of the pressure and temperature, the motion of the projectile within the gun barrel could be calculated for all values of the ratio of specific...

Topics: DTIC Archive, Heybey, W H, NAVAL ORDNANCE LAB WHITE OAK MD, *GUN BARRELS, *GUNS, *PROJECTILES,...

A new experimental technique was developed for determining load and unloading stress-volume paths directly from gage measurements; theoretical models were formulated for stress relaxation and the Bauschinger effect; Hugoniot information was generated from impact experiments on aluminum alloys, titanium alloys, and a woven quartz-phenolic; and the new experimental technique and Bauschinger calculations were applied to the aluminum alloys. The new experimental technique provides for measurement...

Topics: DTIC Archive, Seaman, L, STANFORD RESEARCH INST MENLO PARK CA, *MATERIALS, *SHOCK WAVES, STRESSES,...

The study has been concerned with developing improvements in the physics and in the numerical treatment of the equations governing the dynamics of the plasma produced by a nuclear burst. The studies of the motion of the plasma were based primarily on the Navier-Stokes equations which are applicable at low altitudes where the plasma is a continuum. Considerations were also given to the high altitude rarefied flow regime. Studies were made of the radiative properties of high temperature gases and...

Topics: DTIC Archive, Gordon, Paul, GENERAL ELECTRIC CO PHILADELPHIA PA RE-ENTRY SYSTEMS DEPT, *NUCLEAR...

Procedures for relating waste heat to entropy increases in a shock wave are described. Numerical coefficients for Mie-Gruneisen equations of state are obtained for several liquids. These equations of state are used to calculate the flow produced by a 1.6-cm-radius sphere of C-3-like explosive in a surrounding liquid. Specific entropy increase as a function of radius is included in the calculation, and this is used to determine the waste heat for a 3.85-cm-radius liquid burster....

Topics: DTIC Archive, Duvall, G E, STANFORD RESEARCH INST MENLO PARK CA, *BURSTING CHARGES, LIQUIDS, SHOCK...

The work presented here is related to various problems concerned with the propagation of shock waves, mainly imploding spherical and cylindrical shock waves, in water and (in part) in gases.

Topics: DTIC Archive, Welsh, Robert L, CALIFORNIA UNIV BERKELEY DIV OF AERONAUTICAL SCIENCES, *SHOCK WAVES,...

When a substance such as a low-order explosive or a propellant is ignited, the burning proceeds with a speed and temperature which are described by a certain partial differential equation. The general solution of this equation is not known. The present report deals with a special case of this equation, namely, the case of steady state, in which the burning progresses with uniform speed. We assume moreover that the burning substance has the shape of a thin rod of infinite length. The limitation...

Topics: DTIC Archive, Alt, Franz L, ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD, *PROPELLANTS,...