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A Parametric Pressing Study Using A Plastic Bonded Explosive
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Book Synopsis A Parametric Pressing Study Using a Plastic-bonded Explosive by :
Download or read book A Parametric Pressing Study Using a Plastic-bonded Explosive written by and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pressed plastic-bonded explosives, PBXs, are commonly used by defense and private industry. PBX 9501 is composed of HMX crystals held together with a plastic binder 'softened' with plasticizers. The detonation behavior of any explosive is very dependent upon its density, with the desire to have a uniform, high density throughout the explosive component. A parametric study has been performed pressing PBX 9501 hydrostatically and uniaxially. The effects of several pressing parameters on the bulk density and density profile, as well as mechanical properties, have been measured. The parameters investigated include pressure, temperature, number of cycles, dwell time, rest time, sack thickness, and particle distribution and size. Density distributions within the pressed explosives were also compared.
Book Synopsis Plastic Bonded Explosive (PBX) Particle Size Distribution (PSD) Measurements Using an Image Analysis System by :
Download or read book Plastic Bonded Explosive (PBX) Particle Size Distribution (PSD) Measurements Using an Image Analysis System written by and published by . This book was released on 2003 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: The slurry process for producing plastic bonded explosives (PBX) has been used for many years. However, until recently the mechanisms involved have not been studied quantitatively to determine the effects of the various control variables. Recently, the effects of operating variables on the final product have been studied; however, no attempt was made to measure particle growth during the slurry process. This study applies an image analysis tool to measure particle size distributions (PSDs) during the slurry process to produce PBX 9501, a specific formulation used in nuclear weapons. The observed PBX 9501 slurry behavior leads away from the typical population balance description of agglomeration, that is, a discrete particle-particle coalescence mechanism. The behavior observed in these experiments indicates that the initial state of the system contains a number of smaller particles clustered together. The cluster then coalesces into a large particle as solvent is removed and the slurry continuously mixed. Other small fragments are picked up and a relatively small amount of growth is observed. A mass transfer model adequately describes solvent removal, and an empirical model is developed to describe the growth behavior in terms of measured process variables. The image system is applied to dried molding powders. The PSD measurement results of the PBX 9501 library lots, historic samples set aside as PBX 9501 lots were accepted from the manufacturer, are also discussed and analyzed. A correlation analysis was conducted to find relationships between the measured PSD and other properties such as bulk density and pressed densities. While no significant correlation was found between the measured PSD and averaged bulk densities for the library lots, significant correlations are found between the measured PSD and pressed density. The final part of the study was to scale-up the PSD measurement capability. Since the large-scale processes are not yet operational, this work makes recommendations for future consideration. Also, some additional small-scale experiments are recommended as well as improvements to the smallscale experimental apparatus.
Book Synopsis Influence of Added Graphite on the Mechanical Strength of Pressed Plastic Bonded Explosives by :
Download or read book Influence of Added Graphite on the Mechanical Strength of Pressed Plastic Bonded Explosives written by and published by . This book was released on 1996 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite plastic bonded explosive samples containing 80% and 85% HMX (cyclotetramethylene tetranitramine) in a polymer plastizer binder were produced by mixing, extruding, cutting, drying, and pressing. Before pressing, the extruded material was in some cases coated with a thin layer of graphite (approx. 1 micrometer) for ease in pressing. As part of a general study of these composites, the compressive strength was determined as a function of temperature, strain rate, and the amount of the graphite added. Without graphite, the compressive strength increases with decreasing temperature and increasing strain rate. With graphite, this strength has the same behavior above approximately -10 deg C, but is insensitive to both temperature and strain rate below this temperature for a strain rate of 1.0/sec. In addition, the low temperature value of the compressive strength appears to decrease with increasing graphite thickness. The cracking and fracture patterns are temperature and strain rate dependent and are different with and without graphite. These results indicate that the bond produced by pressing the graphite containing material is stronger than the composite above about -10 deg C and weaker below this temperature so that failure initiates in the composite above about -10 deg C and in the bond below -10 deg C. With increasing strain rate this transition temperature increases. The results also indicate that the bond produced by pressing the material without graphite is at least as strong as the extruded material itself. (MM).
Book Synopsis Characterization of Plastic Bonded Explosives by Pyrolysis-Gas Chromatography and Multivariate Data Analysis, Development of the Procedure (Karakterisering Van Kunststof Gebonden Explosieven Met Pyrolyse-gaschromatografie en Multivariate Data Analyse. Ontwikkeling Van de Procedure). by :
Download or read book Characterization of Plastic Bonded Explosives by Pyrolysis-Gas Chromatography and Multivariate Data Analysis, Development of the Procedure (Karakterisering Van Kunststof Gebonden Explosieven Met Pyrolyse-gaschromatografie en Multivariate Data Analyse. Ontwikkeling Van de Procedure). written by and published by . This book was released on 1994 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: A further development of the procedure based on pyrolysis-gas chromatography (Py-GC) for the characterization of plastic bonded explosives (PBX's) is described. After grinding, the PBX samples were pressed on a pyrolysis wire followed by Py-GC analysis. The peak areas obtained were normalized and submitted to multivariate data analysis. The use of principal component analysis (PCA) was tested on 5 samples which differed slightly in composition and age. The results were promising and showed that PCA is a powerful tool for the differentiation between PBX samples. The pressure by which the samples were pressed on the pyrolysis wire appeared to be an important parameter. This parameter was optimized together with the pyrolysis temperature and the amount of sample. The optimization experiment was carried out with 2 PBX samples which differed only in crosslink density. It turned out that it was difficult to find optima in the parameters resulting in a maximal difference between the 2 samples. The following settings of the parameters were selected: 5.2 tonnes, 75 mg and 610 C.
Book Synopsis Plastic Bonded Explosive (PBX) Particle Size Distribution (PSD) Measurements Using an Image Analysis System by : Gregg Kent Sullivan
Download or read book Plastic Bonded Explosive (PBX) Particle Size Distribution (PSD) Measurements Using an Image Analysis System written by Gregg Kent Sullivan and published by . This book was released on 2003 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preliminary Development and Characterization of a TATB/HMX Plastic-bonded Explosive by :
Download or read book Preliminary Development and Characterization of a TATB/HMX Plastic-bonded Explosive written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Developmental Studies of Constitutive Models for Plastic-bonded Explosives by :
Download or read book Developmental Studies of Constitutive Models for Plastic-bonded Explosives written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Feasibility Study on Continuous Processing of Castable Plastic-bonded Explosives by :
Download or read book Feasibility Study on Continuous Processing of Castable Plastic-bonded Explosives written by and published by . This book was released on 19?? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Re-use of TATB in Plastic-bonded Explosives (PBX) (u). by :
Download or read book On the Re-use of TATB in Plastic-bonded Explosives (PBX) (u). written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Development of AFX-757, a Plastic Bonded Explosive (PBX) for Use in Hard Target Penetrators by : Stephen R. Struck
Download or read book The Development of AFX-757, a Plastic Bonded Explosive (PBX) for Use in Hard Target Penetrators written by Stephen R. Struck and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Agglomeration Characteristics of a Plastic Bonded Explosive by : David J. Kasprzyk
Download or read book Agglomeration Characteristics of a Plastic Bonded Explosive written by David J. Kasprzyk and published by . This book was released on 1998 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interfacial Failure in Plastic Bonded Explosives by : Muhammad Iqbal
Download or read book Interfacial Failure in Plastic Bonded Explosives written by Muhammad Iqbal and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interim Report on the Development of a Plastic Bonded Explosive by :
Download or read book Interim Report on the Development of a Plastic Bonded Explosive written by and published by . This book was released on 1957 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this work was to investigate the possibilities of producing a plastic bonded explosive having greater mechanical strength than that of presently existing plastic bonded explosives. This interim report details activities and progress through July 15, 1957.
Book Synopsis Microstructural Characterization of Simulated Plastic-bonded Explosives by : John David Yeager
Download or read book Microstructural Characterization of Simulated Plastic-bonded Explosives written by John David Yeager and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Developmental Studies of Constitutive Models for Plastic-bonded Explosives by :
Download or read book Developmental Studies of Constitutive Models for Plastic-bonded Explosives written by and published by . This book was released on 1980 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book וזאת ליהודה written by and published by . This book was released on 17?? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
