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Download or read book Comparative Thermal Behavior of HMX and Tatb Base Explosives written by and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 866 pages
Book Rating : 4.:/5 (318 download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1973 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt: NSA is a comprehensive collection of international nuclear science and technology literature for the period 1948 through 1976, pre-dating the prestigious INIS database, which began in 1970. NSA existed as a printed product (Volumes 1-33) initially, created by DOE's predecessor, the U.S. Atomic Energy Commission (AEC). NSA includes citations to scientific and technical reports from the AEC, the U.S. Energy Research and Development Administration and its contractors, plus other agencies and international organizations, universities, and industrial and research organizations. References to books, conference proceedings, papers, patents, dissertations, engineering drawings, and journal articles from worldwide sources are also included. Abstracts and full text are provided if available.
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ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (822 download)
Download or read book Ensekigaisen ni yoru kakuyūgō purazuma no shindan, keisoku kenkyū hōkokusho written by and published by . This book was released on 1980 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Basil Timothy Fedoroff
Publisher :
ISBN 13 :
Total Pages : 930 pages
Book Rating : 4.:/5 (31 download)
Download or read book Encyclopedia of Explosives and Related Items written by Basil Timothy Fedoroff and published by . This book was released on 1960 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Seymour M. Kaye
Publisher :
ISBN 13 :
Total Pages : 932 pages
Book Rating : 4.F/5 ( download)
Download or read book Encyclopedia of Explosives and Related Items written by Seymour M. Kaye and published by . This book was released on 1978 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical-decomposition Models for the Thermal Explosion of Confined HMX, TATB, RDX, and TNT Explosives written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical decomposition models have been deduced from the available chemical kinetic data on the thermal decomposition of HMX, TATB, RDX, and TNT. A thermal conduction model is used in which the thermal conductivity of the reacting explosive decreases linearly with the mass fraction reacted to that of the gaseous products. These reactive heat flow models are used to predict the time to explosion versus reciprocal temperature curves from several heavily confined explosive tests. Good agreement is obtained between experimental and calculated explosion times for the pure explosives HMX, TATB, RDX, and TNT, mixtures such as RX-26-AF (HMX/TATB), Octol (HMX/TNT), and Comp B (RDX/TNT), and for PBX 9404, an HMX-based explosive containing an energetic nitrocellulose binder.
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ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (873 download)
Download or read book Simulating Thermal Explosion of RDX-based Explosives written by and published by . This book was released on 2004 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: We compare two-dimensional model results with measurements for the thermal, chemical and mechanical behavior in a thermal explosion experiment. Confined high explosives are heated at a rate of 1 C per hour until an explosion is observed. The heating, ignition, and deflagration phases are modeled using an Arbitrarily Lagrangian-Eulerian code (ALE3D) that can handle a wide range of time scales that vary from a structural to a dynamic hydro time scale. During the pre-ignition phase, quasi-static mechanics and diffusive thermal transfer from a heat source to the HE are coupled with the finite chemical reactions that include both endothermic and exothermic processes. Once the HE ignites, a hydro dynamic calculation is performed as a burn front propagates through the HE. Two RDX-based explosives, C-4 and PBXN-109, are considered, whose chemical-thermal-mechanical models are constructed based on measurements of thermal and mechanical properties along with small scale thermal explosion measurements. The simulated dynamic response of HE confinement during the explosive phase is compared to measurements in large scale thermal explosion tests. The explosion temperatures for both HE's are predicted to within 5 C. Calculated and measured wall strains provide an indication of vessel pressurization during the heating phase and violence during the explosive phase. During the heating phase, simulated wall strains provide only an approximate representation of measured values indicating a better numerical treatment is needed to provide accurate results. The results also show that more numerical accuracy is needed for vessels with lesser confinement strength. For PBXN-109, the measured wall strains during the explosion are well represented by the ALE3D calculations.
Author : G.B. Manelis
Publisher : CRC Press
ISBN 13 : 1482288265
Total Pages : 373 pages
Book Rating : 4.4/5 (822 download)
Download or read book Thermal Decomposition and Combustion of Explosives and Propellants written by G.B. Manelis and published by CRC Press. This book was released on 2003-01-30 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book investigates the synthesis, kinetics, and thermal decomposition properties and processing of energy-producing materials used in propellants, explosives, pyrotechnic, and gas-generating compositions. Thermal Decomposition and Combustion of Explosives and Propellants provides several mechanisms and stages for the thermal deco
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ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (684 download)
Download or read book Thermal Properties of Explosives. Quarterly Report, April--June 1964 written by and published by . This book was released on 1997 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Changes in the loading technique for the Henkin test to be used when investigating high temperatures explosives are reported. Data comparing times-to-explosion for lead, aluminum {open_quotes}foil{close_quotes}, insulated lead, and insulated aluminum {open_quotes}foil{close_quotes} plugs are included. A preliminary temperature-time curve for an HMX sample in the Henkin batch at 272°C, is reported. The pyrolysis apparatus has been reworked to increase its sensitivity and the results of the changes are readily apparent in the pyrolytic decomposition curves that are reported. Thermal data are reported for some {open_quotes}tailormade{close_quotes} samples of HMX, samples of PETN from different manufacturers, and the six simulated samples of Bridgewater HMX. Differences within these groups are detected by one or another of the tests. Work has begun on a two column gas chromatograph to be used in obtaining chemical reactivity data for use in specifications.
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ISBN 13 :
Total Pages : 1068 pages
Book Rating : 4.3/5 (129 download)
Download or read book Government Reports Index written by and published by . This book was released on 1973 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Thermal Deformation of TATB-based Explosives. Part 1 written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We detail a modeling approach to simulate the anisotropic thermal expansion of polycrystalline (1,3,5-triamino-2,4,6-trinitrobenzene) TATB-based explosives that utilizes microstructural information including porosity, crystal aspect ratio, and processing-induced texture. This report, the first in a series, focuses on nonlinear thermal expansion of "neat-pressed" polycrystalline TATB specimens which do not contain any binder; additional complexities related to polymeric binder and irreversible ratcheting behavior are briefly discussed, however detailed investigation of these aspects are deferred to subsequent reports. In this work we have, for the first time, developed a mesoscale continuum model relating the thermal expansion of polycrystal TATB specimens to their microstructural characteristics. A self-consistent homogenization procedure is used to relate macroscopic thermoelastic response to the constitutive behavior of single-crystal TATB. The model includes a representation of grain aspect ratio, porosity, and crystallographic texture attributed to the consolidation process. A quantitative model is proposed to describe the evolution of preferred orientation of graphitic planes in TATB during consolidation and an algorithm constructed to develop a discrete representation of the associated orientation distribution function. Analytical and numerical solutions using this model are shown to produce textures consistent with previous measurements and characterization for isostatic and uniaxial "die-pressed" specimens. Predicted thermal strain versus temperature for textured specimens are shown to be in agreement with corresponding experimental measurements. Using the developed modeling approach, several simulations have been run to investigate the influence of microstructure on macroscopic thermal expansion behavior. Results from these simulations are used to identify qualitative trends. Implications of the identified trends are discussed in the context of thermal deformation of engineered components whose consolidation process is generally more complex than isostatic or die-pressed specimens. Finally, an envisioned application of the modeling approach to simulating thermal expansion of weapon systems and components is outlined along with necessary future work to introduce the effects of binder and ratcheting behavior. Key conclusions from this work include the following. Both porosity and grain aspect ratio have an influence on the thermal expansion of polycrystal TATB considering realistic material variability. Thepreferred orientation of the single crystal TATB [001] poles within a polycrystal gives rise to pronounced anisotropy of the macroscopic thermal expansion. The extent of this preferred orientation depends on the magnitude of deformation, and consequently, is expected to vary spatially throughout manufactured components much like porosity. The modeling approach presented here has utility toward bringing spatially variable microstructural features into macroscale system engineering modelsAbstract Not Provided.
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ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (894 download)
Download or read book Thermal Properties of Explosives. Quarterly Report, April--June 1965 written by and published by . This book was released on 1965 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project is to determine the thermal properties of explosives, and to continue the development and evaluation of thermal tests. Two preliminary experiments were conducted to determine (1) how the time-to-explosion (TE) using Lee Plugs (short stainless steel and aluminum) would compare with the TE obtained using the lead plugs; and (2) how the Lee Plugs would perform with du Pont's EL-511 and Tacot at 314°C and 362°C., respectively. The Pantex-built chromatograph is operating as a two-column instrument, and the findings of an extensive check out of the instrument are reported. The chemical reactivity test sample holders were shown to evolve approximately 30[mu]l of N2 + O2 and 3 [mu]l of CO2 when heated for 22 hours. A number of thermal tests were made on two lots of LX-04-1 (39A and 38B) to determine if any differences could be detected that would explain why Lot 38B tensile strength is much better than 39A when both were made from the same lot of Viton A. Some differences were detected, but they have not been related to the tensile strength of the material. The time-to-explosion for various Adiprenes with HMX are reported, and they indicate that there could be some reactivity between the Adiprene and HMX. Pantex and LASL DTA thermograms and pyrolograms for PETN and Extex are reported for comparison to determine how the sensitivity of Pantex instruments compare with LASL, and if these instruments could be used to qualify PETN and Extex in accordance with LASL Specification 13Y-104481.
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ISBN 13 :
Total Pages : 668 pages
Book Rating : 4.:/5 (31 download)
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. F. Wardell
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (316 download)
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.
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Download or read book Thermal Response of Explosives Subjected to External Heating. [TNT, Comp. B, HMX, TATB, DATB, and NQ]. written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of unconfined one-dimensional heating experiments in slab geometry was conducted with TNT, Comp. B, plastic-bonded HMX, TATB, DATB, and NQ. The explosive samples were heated on one surface at heating rates between 10 and 25/sup 0/C/min. The experimentaly determined times and temperatures to ignition were reproduced computationally, with one exception, by solving a one-dimensional heat-conduction equation containing a zero-order reaction energy source term and a time-dependent temperature boundary condition. The one exception was plastic-bonded NQ. Unconfined plastic-bonded NQ did not ignite under the experimental conditions used. The heat-transfer mechanism in molten TNT, as expected, was convective; and for molten Comp. B, conductive. A reactive heat-transfer program, EXPLO, was written that is capable of solving the convective transfer mode and accepting mixtures of explosives reacting with first-order kinetics.
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ISBN 13 :
Total Pages : 762 pages
Book Rating : 4.:/5 (3 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
