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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:
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 :
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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 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 : 33 pages
Book Rating : 4.:/5 (227 download)
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.
Author :
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ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (227 download)
Download or read book Characterization of Plastic Bonded Explosives by Pyrolysis-Gas Chromatography and Multivariate Data Analysis. Applications of the Procedure (Karakterisering Van Kunststof Gebonden Explosieven Met Pyrolyse-gaschromatografie en Multivariate Data Analyse. Toepassing Van de Procedure). written by and published by . This book was released on 1994 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of the developed procedure based on pyrolysis-gas chromatography (Py-GC) and principal component analysis (PCA) for the characterization of plastic bonded explosives (PBX's) are described. Due to difficulties with the commonly used normalization method a new normalization method was developed and applied in this investigation. The patterns in the score plots obtained after PCA of the Py-GC results appeared much clearer using this new method. PBX samples were examined on homogeneity, influence of the amount of antioxidant (Flexzone) and the crosslink density. It appears that PBX's were inhomogeneous despite a thorough mixing of the constituents during the preparation. Aging experiments were performed on samples which differed in the amount of Flexzone and in the crosslink density. As more Flexzone was added the change in the pattern of the GC-peaks became less. No relation could be found between the stability of PBX's and the crosslink density. Finally, a comparison was made between Dutch samples and samples from the UK and Norway. Small differences were observed between the samples from the three nations.
Author :
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ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (727 download)
Download or read book Implementation of Strength and Burn Models for Plastic-bonded Explosives and Propellants written by and published by . This book was released on 2009 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have implemented the burn model in LS-DYNA. At present, the damage (porosity and specific surface area) is specified as initial conditions. However, history variables that are used by the strength model are reserved as placeholders for the next major revision, which will be a completely interactive model. We have implemented an improved strength model for explosives based on a model for concrete. The model exhibits peak strength and subsequent strain softening in uniaxial compression. The peak strength increases with increasing strain rate and/or reduced ambient temperature. Under triaxial compression compression, the strength continues to increase (or at least not decrease) with increasing strain. This behaviour is common to both concrete and polymer-bonded explosives (PBX) because the microstructure of these composites is similar. Both have aggregate material with a broad particle size distribution, although the length scale for concrete aggregate is two orders of magnitude larger than for PBX. The (cement or polymer) binder adheres to the aggregate, and is both pressure and rate sensitive. There is a larger bind binder content in concrete, compared to the explosive, and the aggregates have different hardness. As a result we expect the parameter values to differ, but the functional forms to be applicable to both. The models have been fit to data from tests on an AWE explosive that is HMX based. The decision to implement the models in LS-DYNA was based on three factors: LS-DYNA is used routinely by the AWE engineering analysis group and has a broad base of experienced users; models implemented in LS-DYNA can be transferred easily to LLNL's ALE 3D using a material model wrapper developed by Rich Becker; and LS-DYNA could accommodate the model requirements for a significant number of additional history variables without the significant time delay associated with code modification.
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:
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ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (168 download)
Download or read book Inauguration Activities, January Fifteenth, 1963, John Connally, Governor, Preston Smith, Lieutenant Governor written by and published by . This book was released on 1963 with total page 14 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 : David Brandon
Publisher : Wiley
ISBN 13 : 9780471985013
Total Pages : 0 pages
Book Rating : 4.9/5 (85 download)
Download or read book Microstructural Characterization of Materials written by David Brandon and published by Wiley. This book was released on 1999-07-07 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microstructural Characterization of Materials David Brandon and Wayne D. Kaplan Technion, Israel Institute of Technology Israel The internal microstructure and the microstructural features of materials are of key importance when analysing a material for a given engineering application. In specifying the internal microstructure of a material the chemistry, the crystallography, and the structural morphology need to be considered. For each of these aspects, there are three equally important stages of investigation - specimen preparation, image observation and recording, and the analysis and interpretation of recorded data. Microstructural Characterization of Matenals is an integrated treatment of the science of microstructural characterization which emphasizes the interaction of the specimen with the radiation used to probe the microstructure. The three main aspects of microstructural morphology, phase identification and crystallography, and microanalysis of the chemical composition are all covered in detail. Following an introductory chapter, the principal methods of characterization which are commonly available in a well-equipped laboratory are treated in full. These include diffraction analysis, optical microscopy, electron microscopy, and chemical microanalytical techniques. Microstructural Characterization of Materials will be of great value to both undergraduate and graduate students and includes suitable problems for students exercises. More advanced researchers will also find it highly useful as a general reference source.
Author : Caroline A. Handley
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (711 download)
Download or read book Numerical Modelling of Two HMX-based Plastic-bonded Explosives at the Mesoscale written by Caroline A. Handley and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (727 download)
Download or read book Towards Next Generation TATB-based Explosives by Understanding Voids and Microstructure from 10 Nm to 1 Cm written by and published by . This book was released on 2009 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: TATB-based explosives have been investigated on length scales spanning several orders of magnitude, from just under 10 nm to larger than 1 cm. This has been accomplished using a combination of ultra-small angle x-ray scattering (USAXS), ultra-small angle neutron scattering (USANS), and x-ray computed tomography (XRCT). USAXS determines distributions the smallest structures including hot-spot voids from hundreds of nanometers to a few microns, USANS extends this range to about 10 microns, and two variants of XRCT cover sizes from microns to centimeters. Several examples are presented for LX-17, a triaminotrinitrobenzene based plastic bonded explosive using Kel-F 800. As an extension of previous USAXS results, in these proceedings, an alternate binder results in a more uniform microstructure for the PBX, useful towards design of next-generation TATB-based explosives. These data are an important step to understanding microstructural mechanisms that affect the mechanical properties of TATB-based explosives, and provide complete a comprehensive characterization of the structure of LX-17 from nanometers to centimeters that can be used as empirical input to computational models of detonation, and in determining the relationship between voids and microstructure to detonation properties.
Author : Shantanu Bhattacharya
Publisher : Springer
ISBN 13 : 981133269X
Total Pages : 297 pages
Book Rating : 4.8/5 (113 download)
Download or read book Nano-Energetic Materials written by Shantanu Bhattacharya and published by Springer. This book was released on 2018-11-09 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest research on the area of nano-energetic materials, their synthesis, fabrication, patterning, application and integration with various MEMS systems and platforms. Keeping in mind the applications for this field in aerospace and defense sectors, the articles in this volume contain contributions by leading researchers in the field, who discuss the current challenges and future perspectives. This volume will be of use to researchers working on various applications of high-energy research.
Author :
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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:
Author : Ulrich Teipel
Publisher : John Wiley & Sons
ISBN 13 : 3527604936
Total Pages : 643 pages
Book Rating : 4.5/5 (276 download)
Download or read book Energetic Materials written by Ulrich Teipel and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 643 pages. Available in PDF, EPUB and Kindle. Book excerpt: Incorporation of particular components with specialized properties allows one to tailor the end product's properties. For instance, the sensitivity, burning behavior, thermal or mechanical properties or stability of energetic materials can be affected and even controllably varied through incorporation of such ingredients. This book examines particle technologies as applied to energetic materials such as propellants and explosives, thus filling a void in the literature on this subject. Following an introduction covering general features of energetic materials, the first section of this book describes methods of manufacturing particulate energetic materials, including size reduction, crystallization, atomization, particle formation using supercritical fluids and microencapsulation, agglomeration phenomena, special considerations in mixing explosive particles and the production of nanoparticles. The second section discusses the characterization of particulate materials. Techniques and methods such as particle size analysis, morphology elucidation and the determination of chemical and thermal properties are presented. The wettability of powders and rheological behavior of suspensions and solids are also considered. Furthermore, methods of determining the performance of particular energetic materials are described. Each chapter deals with fundamentals and application possibilities of the various methods presented, with particular emphasis on issues applicable to particulate energetic materials. The book is thus equally relevant for chemists, physicists, material scientists, chemical and mechanical engineers and anyone interested or engaged in particle processing and characterization technologies.
Author : Lawrence Livermore National Laboratory
Publisher :
ISBN 13 :
Total Pages : 326 pages
Book Rating : 4.:/5 (318 download)
Download or read book Thrust Area Report written by Lawrence Livermore National Laboratory and published by . This book was released on with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
