Pressure Wave Measurements Resulting from Thermal Cook-Off of the HMX Based High Explosive LX-04 PDF Download
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Author: F. Garcia
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Experiments that investigate thermal and nearby explosion scenarios are needed to provide essential data to models for accurate predictions. A porous LX-04 (85/15 wt% HMX/Viton) sample was heated in a heavily confined donor charge until it thermally exploded. The reaction accelerated a steel cover plate across a 10 cm gap into a preheated gauged acceptor cylinder (near its theoretical maximum density) of LX-04. The carbon resistor gauges in the acceptor measured the resulting multi-dimensional ramp wave as it propagated through the pre-heated LX-04. Detonation of the LX-04 acceptor does not occur. Results are compared to similar experiments with acceptors at room temperature.
Author: F. Garcia
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Experiments that investigate thermal and nearby explosion scenarios are needed to provide essential data to models for accurate predictions. A porous LX-04 (85/15 wt% HMX/Viton) sample was heated in a heavily confined donor charge until it thermally exploded. The reaction accelerated a steel cover plate across a 10 cm gap into a preheated gauged acceptor cylinder (near its theoretical maximum density) of LX-04. The carbon resistor gauges in the acceptor measured the resulting multi-dimensional ramp wave as it propagated through the pre-heated LX-04. Detonation of the LX-04 acceptor does not occur. Results are compared to similar experiments with acceptors at room temperature.
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Category :
Languages : en
Pages :
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Book Description
A better understanding of thermal cook-off is important for safe handling and storing explosive devices. A number of safety issues exist about what occurs when a cased explosive thermally cooks off. For example, violence of the events as a function of confinement are important for predictions of collateral damage. This paper demonstrates how adjacent materials can be gauged to measure the resulting pressure wave and how this wave propagates in this adjacent material. The output pulse from the thermal cook-off explosive containing fixture is of obvious interest for assessing many scenarios.
Author:
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ISBN:
Category :
Languages : en
Pages :
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Book Description
A better understanding of thermal cook-off is important for safe handling and storing explosive devices. A number of safety issues exist about what occurs when a cased explosive thermally cooks off. For example, violence of the events as a function of confinement are important for predictions of collateral damage. This paper demonstrates how adjacent materials can be gauged to measure the resulting pressure wave and how this wave propagates in this adjacent material. The output pulse from the thermal cook-off explosive containing fixture is of obvious interest for assessing many scenarios.
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Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Five different experiments on thermal heating of explosive materials have been performed. Three experiments thermally exploded PBX 9501 (HMX/Estane/BDNPA-F; 9512.512.5 wt %) donor charges while two others thermally exploded LX-04 (HMX/Viton A; 85/15 wt %). These donor charges were encased in 304 stainless steel. The transmitted two-dimensional pressure waves were measured by gauges in acceptor cylinders of Teflon, PBX 9501, or LX-04 that were in contact with the donors' steel case. A fifth experiment measured the pressure in an acceptor charge of PBX 9501 that had a 100 mm stand-off from the top of the steel case of the thermally cooked off PBX 9501 donor charge. Reactive flow hydrodynamic modeling using a rapid deflagration velocity of approximately 500 m/s was able to reproduce the pressure gauge records for both the in contact and stand off experiments that used PBX 9501 donors and acceptors.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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Book Description
A better understanding of thermal cook-off is important for safe handling and storing explosive devices. A number of safety issues exist about what occurs when a cased explosive thermally cooks off. For example, violence of the events as a function of confinement are important for predictions of collateral damage. This paper demonstrates how adjacent materials can be gauged to measure the resulting pressure wave and how this wave propagates in this adjacent material. The output pulse from the thermal cook-off explosive containing fixture is of obvious interest for assessing many scenarios.
Author: Michael D. Furnish
Publisher: American Institute of Physics
ISBN: 9780735403413
Category : Science
Languages : en
Pages : 842
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Book Description
This book constitutes the Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, Baltimore, Maryland USA, 2005. The volume embodies the most recent research on shock compression of condensed matter and includes 363 plenary, invited, and contributed papers, all peer-reviewed. Topics include: equations of state, phase transitions, chemical reactions, warm dense matter, fracture, geophysics and planetary science, energetic materials, optical studies, and more.
Author: F. Garcia
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
Thermal cook-off experiments were carried out using LX-04 explosive (85% HMX and 15% Viton by weight) with different levels of confinement to characterize the effect of confinement on the reaction violence. These experiments involved heating a porous LX-04 sample in a stainless steel container with varying container end plate thickness and assembly bolt diameter to control overall confinement. As expected, detonation did not occur and reducing the overall confinement lowered the reaction violence. This is consistent with modeling results that predict that a lower confinement will act to lower the cook-off pressure and thus the overall burn rate which lowers the overall violence. These results suggest that controlling the overall system confinement can modify the relative safety in a given scenario.
Author: Michael D. Furnish
Publisher:
ISBN:
Category : Condensed matter
Languages : en
Pages : 820
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Book Description
Two volumes contain 350 papers presented at the 13th Biennial International Conference of the APS Topical Group on Shock Compression of Condensed Matter (Portland, Oregon, July 2003). One of the three plenary lectures was given by James Asay (Institute for Shock Physics, Washington State U., Pullman, Washington) on wave structure studies in condensed matter physics. The papers in v.1 address nonenergetic materials; energetic materials; phase transitions; the modeling, simulation, theory, and molecular dynamics modeling of nonreactive and reactive materials; spall, fracture, and fragmentation; constitutive and microstructural properties of metals; mechanical properties of polymers and composites; and mechanical properties of ceramics, glasses, ionic solids, and liquids. The largest number of papers in v.2 are under the headings mechanical properties of reactive materials; detonation and burn phenomena; explosive and initiation studies; experimental techniques; and geophysics, structures, and medical applications. The contributors represent 14 countries, where they work in state and private industry and academic settings. Indexed by both author and subject. Annotation :2004 Book News, Inc., Portland, OR (booknews.com).
Author:
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Category :
Languages : en
Pages :
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Book Description
Safety issues related to thermal cook-off are important for handling and storing explosive devices. Violence of event as a function of confinement is important for prediction of collateral events. There are major issues, which require an understanding of the following events: (1) transit to detonation of a pressure wave from a cook-off event, (2) sensitivity of HMX based explosives changes with thermally induced phase transitions and (3) the potential danger of neighboring explosive devices being affected by a cook-off reaction. Results of cook-off events of known size, confinement and thermal history allows for development and/or calibrating computer models for calculating events that are difficult to measure experimentally.
Author:
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ISBN:
Category : Fluid mechanics
Languages : en
Pages : 200
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Book Description
