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Author : David J. Kasprzyk
Publisher :
ISBN 13 :
Total Pages : 208 pages
Book Rating : 4.:/5 (41 download)
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:
Author : Gregg Kent Sullivan
Publisher :
ISBN 13 :
Total Pages : 576 pages
Book Rating : 4.:/5 (539 download)
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:
Author : E. C. Martin
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (819 download)
Download or read book Effects of Surface Interactions and Mechanical Properties of PBXs on Explosive Sensitivity written by E. C. Martin and published by . This book was released on 1984 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.:/5 (965 download)
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.
Download or read book Formulation-Derived Interface Characteristics Contributing to Failure in Plastic-Bonded Explosive Materials written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Binder Concentration on the Properties of Plastic-bonded Explosives written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of plastic-bonded explosives (PBX) has been formulated with more binder than is normally contained in high-energy formulations. Adding a relatively small amount of binder to a material such as PBX 9501 (95/2.5/1.25/1.25 wt % HMX/Estane/BDNPA/BDNPF (the BDNPA and BDNPF form a eutectic that is frequently called simply the eutectic)) was found to decrease the shock sensitivity while not decreasing the energy of the explosive. The best compromise for a PBX 9501-type material contains about 92 wt % HMX. Adding additional binder does not continue to decrease the gap sensitivity of the formulation; however, the energy of the PBX decreases as expected. The higher-binder formulations are of potential use because of the possibility of formulating a PBX with energy similar to TATB formulations, such as PBX 9502 (95/5 wt % TATB/Kel-F 800), and with a higher strain to failure. 2 refs., 4 figs., 1 tab.
Author : John David Yeager
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (89 download)
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:
Author : Fabrizio Guidotti
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (633 download)
Download or read book Rheological properties of cast cured PBX (Plastic Bonded eXplosives written by Fabrizio Guidotti and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (227 download)
Download or read book Effects of Surface Interactions and Mechanical Properties of Plastic Bonded Explosives on Explosive Sensitivity. Part 2. Model Formulation written by and published by . This book was released on 1985 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eight major mixes were prepared from three baseline binders. The tensile and torsional shear mechanical properties and burning behavior of these model mixes have been investigated. The binder-filler bond energy determined from the surface studies can be correlated to the energy required for the onset of dewetting. The specific impulses of the model mixes were calculated. Some of the model mixes containing energetic binder were difficult to ignite at low energy flux. This suggests that the formulations may be candidates for insensitive energetic systems.
Download or read book Thermally Stable, Plastic-bonded Explosives written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: By use of an appropriate thermoplastic rubber as the binder, the thermal stability and thermal stress characteristics of plastic-bonded explosives may be greatly improved. In particular, an HMX-based explosive composition using an oil-extended styrene-ethylenebutylene-styrene block copolymer as the binder exhibits high explosive energy and thermal stability and good handling safety and physical properties.
Author : Muhammad Iqbal
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
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:
Author :
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ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (684 download)
Download or read book Microscopical Examination of Plastic-bonded Explosives written by and published by . This book was released on 1997 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polarized Light Microscopy is a powerful technique for the identification of powdered explosives. The authors apply the technique here to the characterization in bulk of composite, plastic-bonded explosives, typically consisting of 95 w/o explosive particulate and 5 w/o polymeric binder. Mounting and polishing techniques are described, along with attendant issues of mount dyeing and some complications of cleaning very soft samples. The microstructures of PBX 9501 (based on cyclotetramethylene tetranitramine, or HMX), PBX 9502 (based on triaminotrinitrobenzene or TATB), and X-0535 (based on diaminotetrazine dioxide, or TZX) are compared and contrasted. Selected case studies are presented in which development of prominent structural characteristics, such as particle size and crack density, are tracked from the starting powders through formulation and pressing to serviceable, formed articles.
Download or read book Microstructural Characterization of Plastic-bonded Explosives 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 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:
Author :
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ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (727 download)
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.
Author :
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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)
Download or read book Effect of Confinement on the Mechanical Response of Composite Plastic Bonded Explosives written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mechanical properties of composite explosives are being studied as a function of mechanical confinement and three techniques for confinement were used. These are: (a) a constant confining pressure obtained by oil immersion, (b) radial confinement of a cylindrical sample by a thick walled steel cylinder that surrounds the sample (negligible radial strain), and (c) radial confinement of thin wafers by the platen-sample friction. while many energetic materials fail by crack growth when unconfined (significant surface area free of stress), with all of these forms of confinement, they appear to fail by yield and plastic flow. For crystalline explosives (e.g., TNT and Composition B), the yield strength and the modulus are independent of confining pressure so that useful results can be easily obtained by use of the steel cylinder technique. However, for materials containing polymer binders, such as plastic bonded explosives, a constant confining pressure is used because these properties are found to significantly increase with this pressure. These results indicate the very significant role of the polymer binders in determining the mechanical properties of these energetic materials.
Author :
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ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (684 download)
Download or read book General Chemistry Technical Note No. 61--new Developments in Plastic Bonded Explosives written by and published by . This book was released on 1961 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two new explosives are under development at Lawrence Radiation Laboratory (LRL) which show considerable promise as replacements for PBX 9404 (and also PBX 9010). Three primary considerations have guided us in the development of these explosives. Compared to PBX 9404 we have sought a significant decrease it sensitivity, a substantial gain in mechanical properties and as little loss in energy and detonation velocity as possible. While testing is not complete on these materials and probably won't be for quite some time sufficient information is available to warrant a complete status report at this time. An index of the topics covered herein is: Formulations and Raw Materials; Molding Powder; Explosive Performance; Sensitivity; Thermal Stability; Compatibility; Mechanical Properties; Machinability; Pressability; and Comparison of the Two Materials.
