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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
High Explosives (HE) performs work by the expansion of its detonation products. Along with the propagation of the detonation wave, the equation of state (EOS) of the products determines the HE performance in an engineering system. The authors show the failure of the standard Jones-Wilkins-Lee (JWL) equation of state (EOS) in modeling the overdriven release experiments of PBX 9501. The deficiency can be tracked back to inability of the same EOS in matching the shock pressure and the sound speed on the Hugoniot in the hydrodynamic regime above the Chapman-Jouguet pressure. After adding correction terms to the principal isentrope of the standard JWL EOS, the authors are able to remedy this shortcoming and the simulation was successful.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
High Explosives (HE) performs work by the expansion of its detonation products. Along with the propagation of the detonation wave, the equation of state (EOS) of the products determines the HE performance in an engineering system. The authors show the failure of the standard Jones-Wilkins-Lee (JWL) equation of state (EOS) in modeling the overdriven release experiments of PBX 9501. The deficiency can be tracked back to inability of the same EOS in matching the shock pressure and the sound speed on the Hugoniot in the hydrodynamic regime above the Chapman-Jouguet pressure. After adding correction terms to the principal isentrope of the standard JWL EOS, the authors are able to remedy this shortcoming and the simulation was successful.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
The author presents the Hugoniot pressure and sound speed data in the overdriven regime for both PBX 9501 and PBX 9502. The overdriven release experiments are also given. The failure of the standard Jones-Wilkins-Lee equation of state in modeling both the Hugoniot data and the overdriven release experiments for both high explosives are identified and remedy is made by including additional terms to steepen the slope of the Hugoniot in the high pressure regime. However, an anomaly presented itself as a kink in the release wave of PBX 9502 is observed. A careful examination of the Hugoniot data indicates similar behavior. A possible explanation is suggested for this peculiarity to the phase transition of carbon in the products.
Author: S. C. Schmidt
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1058
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Book Description
Annotation Presents 236 papers from the July/August, 1997 conference. Included are sections on equations of state; phase transitions; mechanical properties of reactive and nonreactive materials; material properties and synthesis; optical, electrical, and laser studies; hypervelocity phenomenology; and impact and penetration mechanics. Attention is focused on the strain and failure behavior, the weak impulse initiation, and the safety aspects of explosives. Developments in measurement techniques, particularly those employing fast optical methods, are also discussed. The CD-ROM contains the contents of the text. Annotation copyrighted by Book News, Inc., Portland, OR.
Author:
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Category :
Languages : en
Pages : 6
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Book Description
Shock initiation experiments on the explosive PBX 9501 (95% HMX, 2.5% estane, and 2.5% nitroplasticizer by weight) were performed at pressures below 3 GPa to obtain in-situ pressure gauge data, run-distance-to-detonation thresholds, and Ignition and Growth modeling parameters. Propellant driven gas guns (101 mm and 155 mm) were utilized to initiate the PBX 9501 explosive with manganin piezoresistive pressure gauge packages placed between sample slices. The run-distance-to-detonation points on the Pop-plot for these experiments showed agreement with previously published data and Ignition and Growth modeling parameters were obtained with a good fit to the experimental data. This parameter set will allow accurate code predictions to be calculated for safety scenarios in the low-pressure regime (below 3 GPa) involving PBX 9501 explosive.
Author: Jacqueline Akhavan
Publisher: Royal Society of Chemistry
ISBN: 183916235X
Category : Technology & Engineering
Languages : en
Pages : 278
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Book Description
The International Explosives Conference (IEC) champions cutting-edge, deep-science research conducted internationally in the energetic materials sector. Designed for professionals, academics and researchers, it is involved in the fundamental science of explosives and other energetic materials. Set firmly in the context of ‘future developments’, IEC-2022 presents and debates the themes of: energetic materials and characterisation; manufacturing and processing; response to stimuli; advances in experimental techniques and diagnostics and theory, modelling and simulation. IEC-2022 took place in London from 22 to 24 June 2022 and this publication provides a record of the proceedings for the oral presentations and display posters that were showcased at the event.
Author:
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ISBN:
Category : Environmental protection
Languages : en
Pages : 744
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Book Description
Author: Charles L. Mader
Publisher: CRC Press
ISBN: 142005239X
Category : Technology & Engineering
Languages : en
Pages : 539
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Book Description
Major advances, both in modeling methods and in the computing power required to make those methods viable, have led to major breakthroughs in our ability to model the performance and vulnerability of explosives and propellants. In addition, the development of proton radiography during the last decade has provided researchers with a major new experimental tool for studying explosive and shock wave physics. Problems that were once considered intractable – such as the generation of water cavities, jets, and stems by explosives and projectiles – have now been solved. Numerical Modeling of Explosives and Propellants, Third Edition provides a complete overview of this rapidly emerging field, covering basic reactive fluid dynamics as well as the latest and most complex methods and findings. It also describes and evaluates Russian contributions to the experimental explosive physics database, which only recently have become available. This book comes with downloadable resources that contain— · FORTRAN and executable computer codes that operate under Microsoft® Windows Vista operating system and the OS X operating system for Apple computers · Windows Vista and MAC compatible movies and PowerPoint presentations for each chapter · Explosive and shock wave databases generated at the Los Alamos National Laboratory and the Russian Federal Nuclear Centers Charles Mader’s three-pronged approach – through text, computer programs, and animations – imparts a thorough understanding of new computational methods and experimental measuring techniques, while also providing the tools to put these methods to effective use.
Author: S.C. Schmidt
Publisher: Elsevier
ISBN: 1483291456
Category : Science
Languages : en
Pages : 1103
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Book Description
The papers collected together in this volume constitute a review of recent research on the response of condensed matter to dynamic high pressures and temperatures. Inlcuded are sections on equations of state, phase transitions, material properties, explosive behavior, measurement techniques, and optical and laser studies. Recent developments in this area such as studies of impact and penetration phenomenology, the development of materials, especially ceramics and molecular dynamics and Monte Carlo simulations are also covered. These latest advances, in addition to the many other results and topics covered by the authors, serve to make this volume the most authoritative source for the shock wave physics community.
Author: Gabi Ben-Dor
Publisher: Springer
ISBN: 3319448668
Category : Technology & Engineering
Languages : en
Pages : 681
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Book Description
These proceedings collect the papers presented at the 30th International Symposium on Shock Waves (ISSW30), which was held in Tel-Aviv Israel from July 19 to July 24, 2015. The Symposium was organized by Ortra Ltd. The ISSW30 focused on the state of knowledge of the following areas: Nozzle Flow, Supersonic and Hypersonic Flows with Shocks, Supersonic Jets, Chemical Kinetics, Chemical Reacting Flows, Detonation, Combustion, Ignition, Shock Wave Reflection and Interaction, Shock Wave Interaction with Obstacles, Shock Wave Interaction with Porous Media, Shock Wave Interaction with Granular Media, Shock Wave Interaction with Dusty Media, Plasma, Magnetohyrdrodynamics, Re-entry to Earth Atmosphere, Shock Waves in Rarefied Gases, Shock Waves in Condensed Matter (Solids and Liquids), Shock Waves in Dense Gases, Shock Wave Focusing, Richtmyer-Meshkov Instability, Shock Boundary Layer Interaction, Multiphase Flow, Blast Waves, Facilities, Flow Visualization, and Numerical Methods. The two volumes serve as a reference for the participants of the ISSW30 and anyone interested in these fields.
Author: Stanley P. Marsh
Publisher: Univ of California Press
ISBN: 9780520040076
Category : Equations of state
Languages : en
Pages : 684
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Book Description
