The Role of Binders in Controlling the Cook-Off Violence of HMX/HTPB Compositions

Cook, M. D.; Stennett, C.; Haskins, P. J.; Briggs, RO; Wood, Andrew; Cheese, P. J.

doi:10.1063/1.2263479

Cited by 7 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The window dimensions selected for this study are nominally 19mm thick, and 50mm diameter. This is identical to that deployed previously [4], [5].…”

Section: Test Vehicle Descriptionsupporting

confidence: 67%

See 1 more Smart Citation

Development of a dual windowed test vehicle for live streaming of cook-off in energetic materials

Cheese

Reeves

White

et al. 2018

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract.A modular, axially connected test vehicle for researching the influence of various heating rates (cook-off) on energetic materials and how they fundamentally decompose, leading to a violent reaction has been developed and tested. The vehicle can accommodate samples measuring up to 50 mm in diameter, with thicknesses variable from 0.5 mm up to 50 mm long. A unique feature of this vehicle is the ability to have a live high speed camera view, without compromising confinement during the cook-off process. This is achieved via two special windows that allow artificial backlighting to be provided at one end for clear observation of the test sample; this has allowed unprecedented views of how explosives decompose and runaway to violent reactions, and has given insight into the reaction mechanisms operating, and challenges current theories. Using glass windows, a burst pressure of 20 MPa has been measured. The heating rate is fully adjustable from slow to fast rates, and its design allows for confinement to be varied to study the influence on the violence of reaction during cook-off. In addition to being able to view the test sample during cook-off, embedded thermocouples provide detailed temperature records and the ability to use Photon Doppler Velocimetry (PDV) instrumentation is also incorporated.

show abstract

“…The window dimensions selected for this study are nominally 19mm thick, and 50mm diameter. This is identical to that deployed previously [4], [5].…”

Section: Test Vehicle Descriptionsupporting

confidence: 67%

“…Methods to directly observe Cook-Off of energetic materials using glass-windowed Cook-Off vehicles have been reported previously [1]- [5]. In the work of Dickson et.…”

Section: Test Vehicle Design Requirementsmentioning

confidence: 99%

Development of a dual windowed test vehicle for live streaming of cook-off in energetic materials

Cheese

Reeves

White

et al. 2018

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…John & Alamo 2000;Balzer et al 2004;Siviour et al 2004a). Incidentally, research by Cook et al (2005) shows that materials with loading densities above 92% reacted significantly more violently.…”

Section: Discussionmentioning

confidence: 99%

High strain rate properties of a polymer-bonded sugar: their dependence on applied and internal constraints

et al. 2008

View full text Add to dashboard Cite

This paper describes research performed on a polymer-bonded sugar (PBS) consisting of 66% caster sugar in a hydroxyl-terminated polybutadiene (HTPB) binder The mechanical response of the PBS and pure HTPB to applied loading at a strain rate of approximately 2000 s K1 at temperatures from K80 to C228C is presented. The materials were also characterized using dynamic mechanical analysis, X-ray tomography and quasi-static loading. These measurements are required for the development of intermediate strain rate constitutive models of polymer-bonded explosives, for which PBSs are a commonly used mechanical simulant.The current constitutive modelling suffers from a lack of experimental data on wellcharacterized composites and binders, especially at intermediate strain rates. This is particularly important for understanding the effects of mixing two materials. Applications of such modelling include explosive safety and fundamental understanding of the various deformation mechanisms. In this paper, the dependences of strength and deformation mechanism on temperature, and, in particular, the glass transition temperature of the binder, are shown. Physical damage plays an important role; X-ray tomography scans support debonding as the primary form of damage during roomtemperature deformation. These results are in agreement with previous investigations and are discussed in this context.

show abstract

“…The UCLA/SLAC/USC collaboration has used the SLAC FFTB electron beam and its ultra-short pulse lengths and high currents (e.g., ız = 20 ȝm at Q = 3 nC). [16] Cherenkov generation with micro-scale silica tubes at Neptune and the planned UCLA Hybrid injector has been discussed as a promising THz radiation source. The breakdown threshold of the dielectric structures has been studied.…”

Section: Diamond-based Dla Structures For Ultra High Gradient Dla Expmentioning

confidence: 99%

“…1. The diamond tubes of this geometry have been developed in the form of 8-10 cm long selfsupporting waveguides (note the multi-cm scale waveguide requirements of the Neptune-Hybrid type THz source [16] mentioned previously). 3) and at the forthcoming SABER project [11,17] (Fig.…”

Section: Diamond-based Dla Structures For Ultra High Gradient Dla Expmentioning

confidence: 99%

Progress on Diamond-Based Cylindrical Dielectric Accelerating Structures

Kanareykin¹,

Schoessow²,

Conde³

et al. 2006

AIP Conference Proceedings

View full text Add to dashboard Cite

The development of a high gradient diamond-based cylindrical dielectric loaded accelerator (DLA) is presented. A diamond-loaded DLA can potentially sustain accelerating gradients far in excess of the limits experimentally observed for conventional metallic accelerating structures. The electrical and mechanical properties of diamond make it an ideal candidate material for use in dielectric accelerators: high rf breakdown level, extremely low dielectric losses and the highest available thermoconductive coefficient. We used the hotfilament Chemical Vapor Deposition (CVD) process to produce high quality 5-10 cm long cylindrical diamond layers. Our collaboration has also been developing a new method of CVD diamond surface preparation that reduces the secondary electron emission coefficient below unity. Special attention was paid to the numerical optimization of the waveguide to structure rf coupling section, where the surface magnetic and electric fields were minimized relative to the accelerating gradient and within known metal surface breakdown limits. We conclude with a brief overview of the use of diamond microstructures for use in compact rf sources.

show abstract

The Role of Binders in Controlling the Cook-Off Violence of HMX/HTPB Compositions

Cited by 7 publications

References 1 publication

Development of a dual windowed test vehicle for live streaming of cook-off in energetic materials

Development of a dual windowed test vehicle for live streaming of cook-off in energetic materials

High strain rate properties of a polymer-bonded sugar: their dependence on applied and internal constraints

Progress on Diamond-Based Cylindrical Dielectric Accelerating Structures

Contact Info

Product

Resources

About