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Pressure Wave Measurements From Thermal Cook Off Of An Hmx Based High Explosive
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Book Synopsis Pressure Wave Measurements from Thermal Cook-Off of an HMX Based High Explosive PBX 9501 by :
Download or read book Pressure Wave Measurements from Thermal Cook-Off of an HMX Based High Explosive PBX 9501 written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A better understanding of thermal cook-off is important for safe handling and storing explosive devices. A number of safety issues exist about what occurs when a cased explosive thermally cooks off. For example, violence of the events as a function of confinement are important for predictions of collateral damage. This paper demonstrates how adjacent materials can be gauged to measure the resulting pressure wave and how this wave propagates in this adjacent material. The output pulse from the thermal cook-off explosive containing fixture is of obvious interest for assessing many scenarios.
Book Synopsis Pressure Wave Measurements from Thermal Cook-off of an HMX Based High Explosive by :
Download or read book Pressure Wave Measurements from Thermal Cook-off of an HMX Based High Explosive written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A better understanding of thermal cook-off is important for safe handling and storing explosive devices. A number of safety issues exist about what occurs when a cased explosive thermally cooks off. For example, violence of the events as a function of confinement are important for predictions of collateral damage. This paper demonstrates how adjacent materials can be gauged to measure the resulting pressure wave and how this wave propagates in this adjacent material. The output pulse from the thermal cook-off explosive containing fixture is of obvious interest for assessing many scenarios.
Book Synopsis Pressure Wave Measurements Resulting from Thermal Cook-Off of the HMX Based High Explosive LX-04 by : F. Garcia
Download or read book Pressure Wave Measurements Resulting from Thermal Cook-Off of the HMX Based High Explosive LX-04 written by F. Garcia and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments that investigate thermal and nearby explosion scenarios are needed to provide essential data to models for accurate predictions. A porous LX-04 (85/15 wt% HMX/Viton) sample was heated in a heavily confined donor charge until it thermally exploded. The reaction accelerated a steel cover plate across a 10 cm gap into a preheated gauged acceptor cylinder (near its theoretical maximum density) of LX-04. The carbon resistor gauges in the acceptor measured the resulting multi-dimensional ramp wave as it propagated through the pre-heated LX-04. Detonation of the LX-04 acceptor does not occur. Results are compared to similar experiments with acceptors at room temperature.
Book Synopsis Pressure Wave Measurements from Thermal Cook-off of an HMX Based Explosive by :
Download or read book Pressure Wave Measurements from Thermal Cook-off of an HMX Based Explosive written by and published by . This book was released on 2001 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A better understanding of thermal cook-off is important for safe handling and storing explosive devices. A number of safety issues exist about what occurs when a cased explosive thermally cooks off. For example, violence of the events as a function of confinement are important for predictions of collateral damage. This paper demonstrates how adjacent materials can be gauged to measure the resulting pressure wave and how this wave propagates in this adjacent material. The output pulse from the thermal cook-off explosive containing fixture is of obvious interest for assessing many scenarios.
Book Synopsis Pressure Wave Measurements During Thermal Explosion of HMX-Based High Explosives by :
Download or read book Pressure Wave Measurements During Thermal Explosion of HMX-Based High Explosives written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Five different experiments on thermal heating of explosive materials have been performed. Three experiments thermally exploded PBX 9501 (HMX/Estane/BDNPA-F; 9512.512.5 wt %) donor charges while two others thermally exploded LX-04 (HMX/Viton A; 85/15 wt %). These donor charges were encased in 304 stainless steel. The transmitted two-dimensional pressure waves were measured by gauges in acceptor cylinders of Teflon, PBX 9501, or LX-04 that were in contact with the donors' steel case. A fifth experiment measured the pressure in an acceptor charge of PBX 9501 that had a 100 mm stand-off from the top of the steel case of the thermally cooked off PBX 9501 donor charge. Reactive flow hydrodynamic modeling using a rapid deflagration velocity of approximately 500 m/s was able to reproduce the pressure gauge records for both the in contact and stand off experiments that used PBX 9501 donors and acceptors.
Book Synopsis Thermal Cook-off of an HMX Based Explosive by :
Download or read book Thermal Cook-off of an HMX Based Explosive written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Safety issues related to thermal cook-off are important for handling and storing explosive devices. Violence of event as a function of confinement is important for prediction of collateral events. There are major issues, which require an understanding of the following events: (1) transit to detonation of a pressure wave from a cook-off event, (2) sensitivity of HMX based explosives changes with thermally induced phase transitions and (3) the potential danger of neighboring explosive devices being affected by a cook-off reaction. Results of cook-off events of known size, confinement and thermal history allows for development and/or calibrating computer models for calculating events that are difficult to measure experimentally.
Book Synopsis Shock Compression of Condensed Matter - 2001 by : Michael D. Furnish
Download or read book Shock Compression of Condensed Matter - 2001 written by Michael D. Furnish and published by American Institute of Physics. This book was released on 2002 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of 336 papers discusses recent research on the response of inert and energetic materials to high-pressure environments produced by rapid loading phenomena. This includes theoretical, computational (modeling/simulation) and experimental studies of inert and energetic materials, as well as ballistic and material synthesis studies and advances in experimental techniques. All papers have been peer-reviewed.
Book Synopsis THERMAL COOK-OFF EXPERIMENTS OF THE HMX BASED HIGH EXPLOSIVE LX-04 TO CHARACTERIZE VIOLENCE WITH VARYING CONFINEMENT. by : F. Garcia
Download or read book THERMAL COOK-OFF EXPERIMENTS OF THE HMX BASED HIGH EXPLOSIVE LX-04 TO CHARACTERIZE VIOLENCE WITH VARYING CONFINEMENT. written by F. Garcia and published by . This book was released on 2005 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal cook-off experiments were carried out using LX-04 explosive (85% HMX and 15% Viton by weight) with different levels of confinement to characterize the effect of confinement on the reaction violence. These experiments involved heating a porous LX-04 sample in a stainless steel container with varying container end plate thickness and assembly bolt diameter to control overall confinement. As expected, detonation did not occur and reducing the overall confinement lowered the reaction violence. This is consistent with modeling results that predict that a lower confinement will act to lower the cook-off pressure and thus the overall burn rate which lowers the overall violence. These results suggest that controlling the overall system confinement can modify the relative safety in a given scenario.
Book Synopsis Shock Compression of Condensed Matter - 2005 by : Michael D. Furnish
Download or read book Shock Compression of Condensed Matter - 2005 written by Michael D. Furnish and published by American Institute of Physics. This book was released on 2006-08-24 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, Baltimore, Maryland USA, 2005. The volume embodies the most recent research on shock compression of condensed matter and includes 363 plenary, invited, and contributed papers, all peer-reviewed. Topics include: equations of state, phase transitions, chemical reactions, warm dense matter, fracture, geophysics and planetary science, energetic materials, optical studies, and more.
Book Synopsis Molecular Modeling of the Sensitivities of Energetic Materials by : Didier Mathieu
Download or read book Molecular Modeling of the Sensitivities of Energetic Materials written by Didier Mathieu and published by Elsevier. This book was released on 2022-04-01 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular Modeling of the Sensitivities of Energetic Materials, Volume 22 introduces experimental aspects, explores the relationships between sensitivity, molecular structure and crystal structure, discusses insights from numerical simulations, and highlights applications of these approaches to the design of new materials. Providing practical guidelines for implementing predictive models and their application to the search for new compounds, this book is an authoritative guide to an exciting field of research that warrants a computer-aided approach for the investigation and design of safe and powerful explosives or propellants. Much recent effort has been put into modeling sensitivities, with most work focusing on impact sensitivity and leading to a lot of experimental data in this area. Models must therefore be developed to allow evaluation of significant properties from the structure of constitutive molecules. - Highlights a range of approaches for computational simulation and the importance of combining them to accurately understand or estimate different parameters - Provides an overview of experimental findings and knowledge in a quick and accessible format - Presents guidelines to implement sensitivity models using open-source python-related software, thus supporting easy implementation of flexible models and allowing fast assessment of hypotheses
Book Synopsis Shock Compression of Condensed Matter--2003 by : Michael D. Furnish
Download or read book Shock Compression of Condensed Matter--2003 written by Michael D. Furnish and published by . This book was released on 2004 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two volumes contain 350 papers presented at the 13th Biennial International Conference of the APS Topical Group on Shock Compression of Condensed Matter (Portland, Oregon, July 2003). One of the three plenary lectures was given by James Asay (Institute for Shock Physics, Washington State U., Pullman, Washington) on wave structure studies in condensed matter physics. The papers in v.1 address nonenergetic materials; energetic materials; phase transitions; the modeling, simulation, theory, and molecular dynamics modeling of nonreactive and reactive materials; spall, fracture, and fragmentation; constitutive and microstructural properties of metals; mechanical properties of polymers and composites; and mechanical properties of ceramics, glasses, ionic solids, and liquids. The largest number of papers in v.2 are under the headings mechanical properties of reactive materials; detonation and burn phenomena; explosive and initiation studies; experimental techniques; and geophysics, structures, and medical applications. The contributors represent 14 countries, where they work in state and private industry and academic settings. Indexed by both author and subject. Annotation :2004 Book News, Inc., Portland, OR (booknews.com).
Book Synopsis Emerging Technology in Fluids, Structures, and Fluid-structure Interactions--2004 by :
Download or read book Emerging Technology in Fluids, Structures, and Fluid-structure Interactions--2004 written by and published by . This book was released on 2004 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shock Wave Science and Technology Reference Library, Vol. 5 by : Blaine Asay
Download or read book Shock Wave Science and Technology Reference Library, Vol. 5 written by Blaine Asay and published by Springer Science & Business Media. This book was released on 2009-12-16 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Los Alamos National Laboratory is an incredible place. It was conceived and born amidst the most desperate of circumstances. It attracted some of the most brilliant minds, the most innovative entrepreneurs, and the most c- ative tinkerers of that generation. Out of that milieu emerged physics and engineering that beforehand was either unimagined, or thought to be f- tasy. One of the ?elds essentially invented during those years was the science of precision high explosives. Before 1942, explosives were used in munitions and commercial pursuits that demanded proper chemistry and con?nement for the necessary e?ect, but little else. The needs and requirements of the Manhattan project were of a much more precise and speci?c nature. Spatial and temporal speci?cations were reduced from centimeters and milliseconds to micrometers and nanoseconds. New theory and computational tools were required along with a raft of new experimental techniques and novel ways of interpreting the results. Over the next 40 years, the emphasis was on higher energy in smaller packages, more precise initiation schemes, better and safer formulations, and greater accuracy in forecasting performance. Researchers from many institutions began working in the emerging and expanding ?eld. In the midst of all of the work and progress in precision initiation and scienti?c study, in the early 1960s, papers began to appear detailing the ?rst quantitative studies of the transition from de?agration to detonation (DDT), ?rst in cast, then in pressed explosives, and ?nally in propellants.
Book Synopsis Energy Materials Coordinating Committe (EMaCC): Fiscal Year 1999 Annual Technical Report by :
Download or read book Energy Materials Coordinating Committe (EMaCC): Fiscal Year 1999 Annual Technical Report written by and published by DIANE Publishing. This book was released on with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Violent Cookoff Reactions in HMX-based Explosives in DDT Tubes by :
Download or read book Violent Cookoff Reactions in HMX-based Explosives in DDT Tubes written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book English Tests; Teacher Pack written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deflagration Behavior of HMX-Based Explosives at High Temperatures and Pressures by : J. F. Wardell
Download or read book Deflagration Behavior of HMX-Based Explosives at High Temperatures and Pressures written by J. F. Wardell and published by . This book was released on 2003 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the deflagration behavior of several HMX-based explosives at pressure from 10-600 MPa and temperatures from 20-180 C. We have made laminar burn rate measurements with the LLNL High Pressure Strand Burner, in which burn wires are used to record the time-of-arrival of the burn front in the cylindrical sample as a function of pressure. The explosive samples are 6.4 mm in diameter and 63 mm long, with ten burn wires embedded at different positions in the sample. Burning on the cylindrical surface is inhibited with an epoxy layer. With this direct measurement we do not have to account for product gas equation of state or heat losses in the system, and the burn wires allow detection of irregular burning. We find that formulation details are very important to overall deflagration behavior - the presence of 10% or less by weight of binder leads to physical deconsolidation and rapid deflagration at high pressures, and a larger particle size distribution leads to slower deflagration. High temperatures have a relatively minor effect on the deflagration rate until the beta-to-delta phase transition temperature is reached, beyond which the deflagration rate increases approximately 40-fold.
