Contribution to the Study of the Initiation of Detonation Produced by Impact on an Explosive PDF Download
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Author: Henri Bernier
Publisher:
ISBN:
Category :
Languages : en
Pages : 131
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Book Description
The initiation of detonation by impact on an explosive is described and discussed in detail. The differences in behavior of homogeneous and heterogeneous explosives are delineated and discussed. A mathematical model is proposed which provides results agreeing with the results of an experimental study of the generation of detonation in a solid granular explosive. A critical examination of various theoretical studies of the initiation of detonation by shock wave is included.
Author: Henri Bernier
Publisher:
ISBN:
Category :
Languages : en
Pages : 131
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Book Description
The initiation of detonation by impact on an explosive is described and discussed in detail. The differences in behavior of homogeneous and heterogeneous explosives are delineated and discussed. A mathematical model is proposed which provides results agreeing with the results of an experimental study of the generation of detonation in a solid granular explosive. A critical examination of various theoretical studies of the initiation of detonation by shock wave is included.
Author: Frank Philip Bowden
Publisher: CUP Archive
ISBN: 9780521312332
Category : Science
Languages : en
Pages : 132
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Book Description
This book describes the research of Bowden, Yoffe and their collaborators on explosive initiation. What Bowden and Yoffe showed was that explosives are ignited almost invariably by thermal processes and though other processes have been identified their work still holds.
Author: Blaine Asay
Publisher: Springer Science & Business Media
ISBN: 3540879536
Category : Technology & Engineering
Languages : en
Pages : 630
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Book Description
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.
Author: C.-O. Leiber
Publisher: Elsevier
ISBN: 0080527620
Category : Science
Languages : en
Pages : 617
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Book Description
This unique book is a store of less well-known explosion anddetonation phenomena, including also data and experiences related tosafety risks. It highlights the shortcomings of the currentengineering codes based on a classical plane wave model of thephenomenon, and why these tools must fail. For the first time all the explosion phenomena are described in termsof proper assemblages of hot spots, which emit pressure waves andassociated near field terms in flow. Not all of the approaches arenew. Some even date back to the 19th century or earlier.. What is newis the application of these approaches to explosion phenomena. Inorder to make these tools easily available to the current detonationphysicist, basic acoustics is therefore also addressed. Whereas the current plane wave, homogeneous flow detonation physicsis an excellent engineering tool for numerical predictions undergiven conditions, the multi-hot-spot-model is an additional tool foranalyzing phenomena that cannot be explained by classicalcalculations. The real benefit comes from being able to understand,without any artificial assumptions, the whole phenomenology ofdetonations and explosions. By specifying pressure generatingmechanisms, one is able to see that the current treatment of thedetonics of energetic materials is only a very special - but powerful- case of explosion events and hazards. It becomes clear thatphysical explosions must be taken into account in any safetyconsiderations. In these terms it is easy to understand why evenliquid carbon dioxide and inert silo materials can explode. A unique collection of unexpected events, which might surprise evenspecialists, has resulted from the evaluation of the model. Thereforethis book is valuable for each explosion and safety scientist for theunderstanding and forecasting of unwanted events. The text mainlyaddresses the next generation of explosion and detonation scientists,with the goal of promoting the science of detonation on a newphysical basis. For this reason gaps in current knowledge are alsoaddressed. The science of explosions is not fully mature, but isstill in its beginning - and the tools necessary for furthering theunderstanding of these phenomena have been with us for centuries.
Author: Peter O. K. Krehl
Publisher: Springer Science & Business Media
ISBN: 3540304215
Category : Science
Languages : en
Pages : 1298
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Book Description
This unique and encyclopedic reference work describes the evolution of the physics of modern shock wave and detonation from the earlier and classical percussion. The history of this complex process is first reviewed in a general survey. Subsequently, the subject is treated in more detail and the book is richly illustrated in the form of a picture gallery. This book is ideal for everyone professionally interested in shock wave phenomena.
Author: Blaine Asay
Publisher: Springer
ISBN: 9783642262401
Category : Technology & Engineering
Languages : en
Pages : 618
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Book Description
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.
Author: A. H. Makomaski
Publisher:
ISBN:
Category : Detonators
Languages : en
Pages : 65
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Book Description
This report is a study of the problem of initiation of low-density PETN by impact of plane hydrogen-oxygen detonation waves in a tube of constant cross-sectional area. The charges were either pressings of pure crystals (of neddle-form or finely ground) or explosive-impregnated foams. Ionization probes and a streak camera were used to study the process of initiation as well as the shock waves generated on detonation of the explosive. (Author).
Author: F. C. GIBSON
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
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Book Description
A continuation of research conducted on deflagration to detonaion in propellants and explosives is presented. Initiation mechanisms and the role of cavitation on the propagation of detonation is emphasized. Simultaneous use of both high-speed photographic and electronic instrumentation is being made to facilitate interpretation of events preceding and during development of detonation in high explosives and propellants. Additionally, detonability studies are made on new high energy propellants as they become available. They are produced in very limited quantities and must be evaluated in small scale tests using comined instrumentation techniques; results of such studies are compared to common high-explosive behavior under similar conditions. (Author).
Author:
Publisher:
ISBN:
Category : Explosions
Languages : en
Pages : 674
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Book Description
Author: Jack Alster
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
In a chain explosion, the initial chemical reaction follows one or more modes of reaction (1,2). The ensuing highly reactive transient species, commonly believed to be radicals, react with intact explosive molecules to produce more radicals which ultimately recombine and release energy sufficient to support a detonation wave. To achieve better control over the detonation process it is important to know the rate of the relatively slow, primary reaction step and the nature of the transient species produced in this step. When, in particular, a condensed explosive experiences the high dynamic pressure of a strong, initiating shock wave, it may initially decompose via a bimolecular rather than a more commonly accepted unimolecular process. The present study was undertaken to examine this question in relation to the primary reaction step in liquid methyl nitrate undergoing shock initiation of detonation.
