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,...

In the past decade there has been much work on the sound generated underwater by a moving laser source. In particular, a great deal of effort has been directed toward understanding the thermoacoustic sound generation process, in which the laser heats the fluid medium and radiates sound as a result of the induced volumetric expansion. Theoretical predictions of the laser generated sound and experimental measurements have been shown to agree well for a wide range of source velocities, and...

Topics: DTIC Archive, Chandrasekhar, Rao J, TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS, *THERMAL SHOCK,...

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,...

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...

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,...

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,...

Inverse thermal analyses of structural steel deep-penetration welds are presented. These analyses employ a methodology that is in terms of numerical-analytical basis functions and multiple constraint conditions for inverse thermal analysis of steady state energy deposition in plate structures. These analyses provide parametric representations of weld temperature histories that can be adopted as input data to various types of computational procedures, such as those for prediction of solid-state...

Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC MATERIALS SCIENCE AND TECHNOLOGY DIV, *LASERS,...

Inverse thermal analyses of structural steel deep-penetration welds are presented. These analyses employ a methodology that is in terms of numerical-analytical basis functions and multiple constraint conditions for inverse thermal analysis of steady state energy deposition in plate structures. These analyses provide parametric representations of weld temperature histories that can be adopted as input data to various types of computational procedures, such as those for prediction of solid-state...

Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC MATERIALS SCIENCE AND TECHNOLOGY DIV, *LASERS,...

Ballistic gelatin samples are measured to find their density and the specific heat capacity as a function of temperature. Their volume thermal expansion coefficients, the specific heat capacity ratio (from tests in the range of 20-30 degree C), and the Grueneisen parameter as a function of temperature are calculated from the measured data. These values are used to improve the P-V relationship data, which are then fitted to the Vinet and the Birch-Murnaghan equation of state. However, the fitted...

Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH...

A simple control volume model has been developed to calculate the discharge coefficient through a mass flow plug (MFP) and validated with a calibration experiment. The maximum error of the model in the operating region of the MFP is 0.54%. The model uses the MFP geometry and operating pressure and temperature to couple continuity, momentum, energy, an equation of state, and wall shear. Effects of boundary layer growth and the reduction in cross-sectional flow area are calculated using an in-...

Topics: NASA Technical Reports Server (NTRS), CALIBRATING, PRESSURE EFFECTS, COMPUTATIONAL FLUID DYNAMICS,...

Phase transitions occur in a variety of physical phenomena ranging from condensation of gases to solidi cation of liquids. It is of paramount importance to provide an adequate modelling of these phenomena in a thermodynamically consistent way. This paper addresses an introduction into the mathematical modelling of phase transitions in fluids from the perspective of consistently employing a modi ed Legendre transform of entropy considered as a given function of internal energy and volume. An...

Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS...

No abstract available

Topics: NASA Technical Reports Server (NTRS), X RAYS, SPACE MISSIONS, OBSERVATORIES, NEUTRON STARS, BLACK...

The Army's inchoate professional Ethic attempts to fill a significant gap in the Army's attempt to maintain professional status. It demonstrates the intentionality to address ethical failures by promulgating an aspirational Ethic focused on The Trustworthy Army Profession who has character, competence, and commitment. Is the Army Ethic sufficient for the Army profession? The Army Ethic passes screening criteria from an external literature review, which makes it a viable option as an Ethic. It...

Topics: DTIC Archive, ARMY COMMAND AND GENERAL STAFF COLLEGE FORT LEAVENWORTH KS, *EXPLOSIVES*EXPLOSIVES,...

Hugoniot states of heterogeneous materials obtained in shock experiments transit through various thermodynamic states that are not necessarily in equilibrium. Detailed numerical analysis employing a multi-phase constitutive material model has been conducted earlier which stressed the role of achieving equilibrium between the gaseous and condensed phases. The analysis also showed that the abnormal response of highly porous materials is closely associated with the attainment of the inter-phase...

Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY GROUP EDINBURGH (AUSTRALIA), *EQUILIBRIUM(GENERAL),...

No abstract available

Topics: NASA Technical Reports Server (NTRS), BOLTZMANN TRANSPORT EQUATION, BOND NUMBER, CRYOGENIC ROCKET...

A scalable computational approach to the simulation of propellant tank sloshing dynamics in microgravity is presented. In this work, we use the lattice Boltzmann equation (LBE) to approximate the behavior of two-phase, single-component isothermal flows at very low Bond numbers. Through the use of a non-ideal gas equation of state and a modified multiple relaxation time (MRT) collision operator, the proposed method can simulate thermodynamically consistent phase transitions at temperatures and...

Topics: NASA Technical Reports Server (NTRS), BOLTZMANN TRANSPORT EQUATION, BOND NUMBER, CRYOGENIC ROCKET...

Neutron star models are studied in the context of scalar-tensor theories of gravity in the presence of a conformally coupled scalar field, using two different numerical equations of state (EoS) representing different degrees of stiffness. In both cases we obtain a complete solution by matching the interior numerical solution of the coupled Einstein-scalar field hydrostatic equations, with an exact metric on the surface of the star. These are then used to find the effect of the scalar field and...

Topics: NASA Technical Reports Server (NTRS), NEUTRON STARS, STELLAR MODELS, STELLAR STRUCTURE, STELLAR...

Multi-scale modeling of complex material systems requires starting from fundamental building blocks to capture the scale relevant features through associated computational models. In this paper, molecular dynamics (MD) modeling is employed to predict mechanical properties of key hydrated cement constituent calcium-silicate-hydrate (CSH) at the molecular, nanometer scale level. Due to complexity, still unknown molecular configuration of CSH, a representative configuration widely accepted in the...

Topics: DTIC Archive, NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIV GREENSBORO, *MOLECULAR DYNAMICS,...

PDV (Photonic Doppler Velocimetry) has proven to be a reliable and versatile technique to observe rapid deformation of frangible joints. It will be a valuable technique in order to understand the physics of two-stage light gas guns and the material response to hypervelocity impact.

Topics: NASA Technical Reports Server (NTRS), HYPERVELOCITY IMPACT, PHOTONICS, LIGHT GAS GUNS, IMPACT...

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...

A new blast code, Loci/BLAST, has been coupled with the commercial structural dynamics package LS-DYNA to provide a fully-coupled simulation strategy for predicting the effects of blast on a ground vehicle. Loci/BLAST is a fully-conservative, computational fluid dynamics code with the capability to model soil and blast using a multispecies formulation with advanced equations of state. The two-way coupling between Loci/BLAST and LS-DYNA provides a robust mechanism for predicting the...

Topics: DTIC Archive, MISSISSIPPI STATE UNIV MISSISSIPPI STATE CENTER FOR ADVANCED VEHICULAR SYSTEMS,...

Oxygen fugacity (fO2) controls multivalent phase equilibria and partitioning of redox-sensitive elements, and it is important to understand this thermodynamic parameter in experimental and natural systems. The coexistence of a metal and its oxide at equilibrium constitutes an oxygen buffer which can be used to control or calculate fO2 in high pressure experiments. Application of 1-bar buffers to high pressure conditions can lead to inaccuracies in fO2 calculations because of unconstrained...

Topics: NASA Technical Reports Server (NTRS), OXIDATION-REDUCTION REACTIONS, PRESSURE DEPENDENCE,...

The equilibrium thermodynamic properties of propellants are routinely calculated by standard computer codes such as NASA-Lewis, BAGHEERA, or BLAKE. This thermodynamic information is also packaged by the interior ballistic (IB)-oriented codes BLAKE and BAGHEERA and transferred to IB performance codes via several parameters (mainly , impetus [I], and the covolume). A related quantity called the chemical energy [CE = I/( 1)] is also usually calculated, since it is sometimes viewed as one of the...

Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH...

In this project our long-term goal is to determine the ways and degrees to which realistically complex oceanic and atmospheric simulation models have an irreducible imprecision, hence an irreducible uncertainty in their analysis and forecast products. This goal is a natural accompaniment to the goal of continuing the evolution of the Regional Oceanic Modeling System (ROMS) as a multi-scale, multi-process model and utilizing it for studying a variety of oceanic phenomena that span a scale range...

Topics: DTIC Archive, CALIFORNIA UNIV LOS ANGELES, *OCEAN MODELS, *UNCERTAINTY, AIR WATER INTERACTIONS,...

This report documents development of a computer-based equation of state (EOS) that covers the range of conditions from the air saturation line to beyond lunar reentry conditions. Efforts to ascertain the limits of accuracy of the EOS are also documented. The EOS is largely a computer-based version of the venerable AEDC Mollier Diagram for equilibrium air, c. 1967. The basis of this EOS is different from its predecessor, but the range of applicability is comparable and the purpose is the same....

Topics: DTIC Archive, AEROSPACE TESTING ALLIANCE (ATA) ARNOLD AFB TN, *EQUATIONS OF STATE, AIR, CHEMICAL...

The widely spread hydro code uses the specific volume V and the specific internal energy E as independent thermodynamic variables. Because of that fact, the thermodynamically consistent implementation of the hydro code requires the complete equation of state (EOS) in the form S = S (V, E), where S is the specific entropy. We suggest a complete EOS for hydrocode which is an operator of three functions of one variable each: A (V), P (E), lambda (V).

Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH...

In theater, protective systems are exposed to a wide variety of ballistic and sub-ballistic threats, which may compromise their ability to withstand single or multiple impacts. Low-velocity impact damage can originate from a number of sources that may include vehicle collisions, harsh terrain and environmental conditions, or foreign object debris from persons of interest, other vehicles, or shrapnel. Advanced ceramic components in these systems include materials, such as aluminum oxide, boron...

Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH...

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,...

This paper deals with the accurate microscopic simulation and macroscopic modeling of extreme non-equilibrium phenomena, such as encountered during hypersonic entry into a planetary atmosphere. The state-to-state microscopic equations involving internal excitation, de-excitation, dissociation, and recombination of nitrogen molecules due to collisions with nitrogen atoms are solved time-accurately. Strategies to increase the numerical efficiency are discussed. The problem is then modeled using a...

Topics: NASA Technical Reports Server (NTRS), SIMULATION, MACROSCOPIC EQUATIONS, MATHEMATICAL MODELS,...

The previously unknown I2O7 was successfully synthesized and characterized. The only missing piece of information is a crystal structure. It was shown that it is of insufficient thermal stability, but that the known I2O6 is an excellent substitute. The literature synthesis for I2O6 was drastically improved and scaled up to the 100 g level. Several hundred gram of I2O6 were prepared and provided to Prof. Vashistha (USC), Prof. Dreizin (NJ Inst. of Technology), Prof. Zachariah (U of Maryland),...

Topics: DTIC Archive, UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES, *BIOLOGICAL AGENTS, *CHEMICAL AGENTS,...

Volatile escape is the classic existential problem of planetary atmospheres. The problem has gained new currency now that we can study the cumulative effects of escape from extrasolar planets. Escape itself is likely to be a rapid process, relatively unlikely to be caught in the act, but the cumulative effects of escape in particular, the distinction between planets with and without atmospheres should show up in the statistics of the new planets. The new planets make a moving target. It can be...

Topics: NASA Technical Reports Server (NTRS), PLANETARY ATMOSPHERES, EXTRASOLAR PLANETS, SHORELINES, GAS...

Accurate tools and procedures for simulating the blast effects of shallow buried explosive devices are critical to the Department of Defense's efforts to design blast-resistant vehicles that can increase crew survivability and counter the threat from improvised explosive devices. Of the various computer codes available for modeling explosive effects, the CTH (CHART Squared to the Three-Halves) Eulerian hydrocode from Sandia National Laboratories is one of the most popular and is considered a...

Topics: DTIC Archive, MISSISSIPPI STATE UNIV MISSISSIPPI STATE CENTER FOR ADVANCED VEHICULAR SYSTEMS,...

Accurate modeling and simulation of the effects of near-field blast events on vehicles and personnel is of interest to the Department of Defense. Applications include minimizing casualties and improving vehicle survivability from attacks using improvised explosive devices. The coupled Eulerian-Lagrangian (CEL) capability in Abaqus/Explicit was used to replicate experimental tests in which the structural response of varying metal panels subjected to the detonation of a buried charge was...

Topics: DTIC Archive, DASSAULT SYSTEMES SIMULIA CORP PROVIDENCE RI, *BLAST, *MATHEMATICAL MODELS, *NEAR...

No abstract available

Topics: NASA Technical Reports Server (NTRS), PULSED PLASMA THRUSTERS, MATHEMATICAL MODELS, KINETIC ENERGY,...

Currently, the modeling of supercritical-pressure flows through Large Eddy Simulation (LES) uses models derived for atmospheric-pressure flows. Those atmospheric-pressure flows do not exhibit the particularities of high densitygradient magnitude features observed both in experiments and simulations of supercritical-pressure flows in the case of two species mixing. To assess whether the current LES modeling is appropriate and if found not appropriate to propose higher-fidelity models, a LES a...

Topics: NASA Technical Reports Server (NTRS), DATA BASES, DIRECT NUMERICAL SIMULATION, MIXING LAYERS...

Using a mid-infrared calibration of the Cepheid distance scale based on recent observations at 3.6 micrometers with the Spitzer Space Telescope, we have obtained a new, high-accuracy calibration of the Hubble constant. We have established the mid-IR zero point of the Leavitt law (the Cepheid period-luminosity relation) using time-averaged 3.6 micrometers data for 10 high-metallicity, MilkyWay Cepheids having independently measured trigonometric parallaxes. We have adopted the slope of the PL...

Topics: NASA Technical Reports Server (NTRS), HUBBLE CONSTANT, CALIBRATING, CEPHEID VARIABLES, SPACE...

In order to understand the behavior of granular deposit subjected to high-speed projectile impact, we perform some experiments and grain-scale numerical simulations. In the high-speed impact experiment, we adopted a new technology to measure the deceleration of projectile after penetrating into sand layer. The observed results together with simple one-dimensional model with Rankine-Hugoniot equations suggests the importance of grain-scale mechanics such as grain crushing to evaluate the...

Topics: DTIC Archive, TSUKUBA UNIV IBARAKI (JAPAN), *GRANULAR MATERIALS, *IMPACT, *MATHEMATICAL MODELS,...

The response of porcine adipose and skeletal muscle tissues to shock compression has been investigated using the plate-impact technique in conjunction with manganin foil pressure gauge diagnostics. This approach has allowed for measurement of the levels of uniaxial stress imparted to both skeletal muscle and rendered adipose tissue by the shock. In addition, the lateral stress component generated within adipose tissue during shock loading has also been investigated. The techniques employed in...

Topics: DTIC Archive, CRANFIELD UNIV (UNITED KINGDOM), *ADIPOSE TISSUE, *COMPRESSION, *HYDRODYNAMICS,...

Simple mixture models for the prediction of shock equations of state (Hugoniot) are a necessary tool for characterization of multiple composites. A mixture model for determining the shock equation of state of composite materials is presented. The model is completely flexible allowing for multiple (2) components. Additionally, error propagation analysis for the two component mixture model has been accomplished. The model predicts the equation of state to 5%-15% of the experimental data, which is...

Topics: DTIC Archive, AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE, *EQUATIONS OF STATE,...

We present several novel explicit formulas for recovery of the complete EOS for hydrocode from experimental data. It is assumed that the substance in question possesses only two thermodynamic degrees of freedom V the specific volume V and the specific internal energy E . It is also assumed that the measurements of the heat capacity Cv = C(V,E) at constant volume, of the isentrope Es = E(circle multiply)s (V), passing through the state (V circle multiply, E circle multiply), and of the Hugoniot...

Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH...

Studies of anisotropic materials and the discovery of various novel and unexpected phenomena under shock loading has contributed significantly to our understanding of the behavior of condensed matter. The variety of experimental studies for isotropic materials displays systematic patterns, giving basic insights into the underlying physics of anisotropic shock-wave modeling. There are many similarities and significant differences in the phenomena observed for isotropic and anisotropic materials...

Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH...

Using density functional theory with empirical van der Waals corrections, cold pressure curves were calculated and combined with the quasi-harmonic approximation to study thermodynamical properties of several energetic molecular solids. Vibration spectra at each compression were calculated and used for including temperature and zero-point energy contributions to the free energy. Equilibrium properties at temperatures of experiments, as well as hydrostatic equations of state, specific heat...

Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC, *EQUATIONS OF STATE, DENSITY FUNCTIONAL THEORY,...

This second-year progress report describes an ongoing program on the multiscale modeling of noncrystalline ceramics (glass) funded from the Director s Strategic Initiatives (DSIs) in support of the U.S. Army Research Laboratory s (ARL) Strategic Research Initiatives. The long-term research goal of the program is to develop a concurrent multiscale computational finite element code for optimizing or enhancing the performance of various glasses against shaped-charge jets; the initial work focuses...

Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH...

This report describes the accomplishments for the MURI grant General, Unified, Multiscale Modeling to Predict the Sensitivity of Energetic Materials (Grant No. 48101-EG-MUR). This was a comprehensive theoretical/computational research program to develop, validate, benchmark, and apply methods and models to provide predictive capabilities for energetic materials. The thrust of the work was the development of atomic-level models and ab initio quantum chemistry methods that are generally...

Topics: DTIC Archive, MISSOURI UNIV-COLUMBIA DEPT OF CHEMISTRY, *ENERGETIC PROPERTIES, *MATERIALS, *MODELS,...

Objects model the world, and state is fundamental to a faithful modeling. Engineers use state machines to understand and reason about state transitions, but programming languages provide little support for building software based on state abstractions. We propose Plaid, a language in which objects are modeled not just in terms of classes, but in terms of changing abstract states. Each state may have its own representation as well as methods that may transition the object into a new state. A...

Topics: DTIC Archive, CARNEGIE-MELLON UNIV PITTSBURGH PA INST OF SOFTWARE RESEARCH INTERNAT, *OBJECT...

The future timing capabilities in X-ray astronomy will be reviewed. This will include reviewing the missions in implementation: Astro-H, GEMS, SRG, and ASTROSAT; those under study: currently ATHENA and LOFT; and new technologies that may enable future missions e.g. Lobster eye optics. These missions and technologies will bring exciting new capabilities across the entire time spectrum from micro-seconds to years that e.g. will allow us to probe close to the event horizon of black holes and...

Topics: NASA Technical Reports Server (NTRS), BLACK HOLES (ASTRONOMY), X RAY ASTRONOMY, X RAY OPTICS,...

The equation of state (EOS) with separable internal energy played a big role in the analysis of dynamics of condensed matter and development of the mathematical basis of the shock-wave physics (Courant, R.; Friedrichs, K. O. Supersonic Flow and Shock Waves; Interscience: New York, 1948). For such models, the internal energy density Epsilon , as a function of the specific volume V and entropy density S , can be presented as Epsilon(V , S) = Delta(V) + X(S), where functions Delta(V) and X(S)...

Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH...

This report documents the initial development of the High Pressure Particulate Physics (HP3) facility. The facility is anticipated to allow precision impact of two flat plates at a very high degree of precision with minimal misalignment when completed. A 60 mm smooth bore powder gun will be used to achieve this capability. Impacts will occur under high vacuum conditions. The gun will fire projectiles that carry a faced material at the nose and will impact a stationary target at the muzzle end....

Topics: DTIC Archive, AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE, *EQUATIONS OF STATE, *TEST...