Microscopic Theory of Detonation in Solids PDF Download
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Author: C. E. Melton
Publisher:
ISBN:
Category :
Languages : en
Pages : 25
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Book Description
A detonation theory based on a microscopic model of a solid has been developed. This was accomplished by considering known physical and chemical properties of the individual molecules in the system. The results show that molecular vibrational energies, normal lattice frequencies and activation energies are the most important parameters in the model. Molecules having low vibrational energies are easier to detonate, according to the theory, because of the ease of creation of a population inversion or 'hot spot' in the system. A 'perfect crystal' would be more difficult to detonate because initiation would occur at one of the faces. However, the model shows that perfect crystals of unstable solids cannot be grown. Consequently, detonation in any real crystal will be initiated in the interior near a defect. The present model explains many experimental observations that cannot be explained on the basis of older theories of detonation. For example, the microscopic theory can easily explain the occurrence of explosions during growth of crystals from solutions. (Author).
Author: C. E. Melton
Publisher:
ISBN:
Category :
Languages : en
Pages : 25
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Book Description
A detonation theory based on a microscopic model of a solid has been developed. This was accomplished by considering known physical and chemical properties of the individual molecules in the system. The results show that molecular vibrational energies, normal lattice frequencies and activation energies are the most important parameters in the model. Molecules having low vibrational energies are easier to detonate, according to the theory, because of the ease of creation of a population inversion or 'hot spot' in the system. A 'perfect crystal' would be more difficult to detonate because initiation would occur at one of the faces. However, the model shows that perfect crystals of unstable solids cannot be grown. Consequently, detonation in any real crystal will be initiated in the interior near a defect. The present model explains many experimental observations that cannot be explained on the basis of older theories of detonation. For example, the microscopic theory can easily explain the occurrence of explosions during growth of crystals from solutions. (Author).
Author: C.-O. Leiber
Publisher: Elsevier
ISBN: 9780444513328
Category : Science
Languages : en
Pages : 626
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Book Description
Whereas the current plane wave, homogeneous flow detonation physics is an excellent engineering tool for numerical predictions under given conditions, the multi-hot-spot-model is an additional tool for analyzing phenomena that cannot be explained by classical calculations. The real benefit comes from being able to understand, without any artificial assumptions, the whole phenomenology of detonations and explosions. By specifying pressure generating mechanisms, one is able to see that the current treatment of the detonics of energetic materials is only a very special - but powerful - case of explosion events and hazards. It becomes clear that physical explosions must be taken into account in any safety considerations. In these terms it is easy to understand why even liquid carbon dioxide and inert silo materials can explode. A unique collection of unexpected events, which might surprise even specialists, has resulted from the evaluation of the model.-
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 652
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Author: Wildon Fickett
Publisher: Courier Corporation
ISBN: 0486140709
Category : Science
Languages : en
Pages : 420
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Book Description
Comprehensive review of detonation explores the "simple theory" and experimental tests of the theory; flow in a reactive medium; steady detonation; the nonsteady solution; and the structure of the detonation front. 1979 edition.
Author: S. Odiot
Publisher:
ISBN:
Category : Detonation waves
Languages : en
Pages : 680
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Book Description
Author: Anatoly N. Dremin
Publisher: Springer Science & Business Media
ISBN: 1461205638
Category : Technology & Engineering
Languages : en
Pages : 163
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Book Description
It is known that the Chapman-Jouguet theory of detonation is based on the assumption of an instantaneous and complete transformation of explosives into detonation products in the wave front. Therefore, one should not expect from the theory any interpretations of the detonation limits, such as shock initiation of det onation and kinetic instability and propagation (failure diameter). The Zeldovich-Von Neuman-Doring (ZND) theory of detonation appeared, in fact, as a response to the need for a theory capable of interpreting such limits, and the ZND detonation theory gave qualitative interpretations to the detonation limits. These interpretations were based essentially on the theoretical notion that the mechanism of explosives transformation at detonation is a combustion of a layer of finite thickness of shock-compressed explosive behind the wave shock front with the velocity of the front. However, some experimental findings turned out to be inconsistent with the the ory. A very small change of homogeneous (liquid) explosives detonation velocity with explosive charge diameter near the rather sizable failure diameter is one of the findings. The elucidation of the nature of this finding has led to the discovery of a new phenomenon. This phenomenon has come to be known as the breakdown (BD) of the explosive self-ignition behind the front of shock waves under the effect of rarefaction waves.
Author: Wildon Fickett
Publisher: Univ of California Press
ISBN: 0520366093
Category : Science
Languages : en
Pages : 266
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Book Description
This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1985.
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: Denis F. Strenzwilk
Publisher:
ISBN:
Category :
Languages : en
Pages : 69
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Book Description
Explosive and propellent crystals are chemically reactive solids in which impurities are known to affect the sensitivity to detonation or combustion. When these materials are stored for a period of time reactions may take place which may less their effectiveness. The proper handling of these materials requires a knowledge of what stimuli will ignite, detonate, or damage them in order to attain the desired effect. The report uses microscopic models and principles to study the transfer of lattice vibrational energy into the first excited state of the vibrational mode of a molecule located in a perfect crystal, or next to a mass defect. Also considered is energy being absorbed by the defect molecule. The model is intended to explain energy transfer in molecular crystals which are of interest to the Army. (Author).
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1208
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Book Description
