Assessment of Mechanically Induced Damage in Solid Energetic Materials

Atwood, Alice I.; Ford, K. P.; Bui, David T.; Curran, P. O.; Lyle, T. M.

doi:10.1615/intjenergeticmaterialschemprop.v8.i5.20

Cited by 4 publications

(6 citation statements)

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“…For our purposes, the scale of irregularity is determined by the scale that can be sensed by an advancing flame. The frangibility test (shotgun test) [30] has been used to characterize propellant or explosive response to mechanical insult. In that test, an explosive or propellant sample is impacted on a steel plate.…”

Section: Calculation Of Sub-sonic Burning After Ignitionmentioning

confidence: 99%

A Computer Model to Study the Response of Energetic Materials to a Range of Dynamic Loads

Reaugh

White

Curtis

et al. 2018

Propellants Explo Pyrotec

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Over the past decade we developed a model to enable computer simulation of the mechanical and subsequent energetic response of explosives and propellants to mechanical insults such as impacts, perforations, drops, and falls. The model is embedded in computer simulation programs that solve the non‐linear, large deformation equations of compressible solid and fluid flow in space and time. It is implemented as a user‐defined model, which returns the updated stress tensor and composition that result from the simulation supplied strain tensor change. Although it is multi‐phase, in that gas and solid species are present, it is single‐velocity, in that the gas does not flow through the porous solid. More than 70 time‐dependent variables are made available for additional analyses and plotting. The model encompasses a broad range of possible responses: mechanical damage with no energetic response, and a continuous spectrum of degrees of violence including delayed and prompt detonation. This paper describes the basic workings of the model.

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Section: Calculation Of Sub-sonic Burning After Ignitionmentioning

confidence: 99%

A Computer Model to Study the Response of Energetic Materials to a Range of Dynamic Loads

Reaugh

White

Curtis

et al. 2018

Propellants Explo Pyrotec

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“…Highly loaded closed bomb techniques are heavily used in the gun and explosives communities, with limited use by the solid rocket propellant community. The solid rocket propellant community has used the closed bomb for the evaluation of propellant friability and its propensity for de §agration-to-detonation transition (DDT) [7]. Strand or window burners have had more use in the solid propellant community.…”

Section: Techniquementioning

confidence: 99%

High-pressure burning rate studies of solid rocket propellants

Atwood

Ford

Wheeler

2013

Progress in Propulsion Physics

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Increased rocket motor performance is a major driver in the development of solid rocket propellant formulations for chemical propulsion systems. The use of increased operating pressure is an option to improve performance potentially without the cost of reformulation. A technique has been developed to obtain burning rate data across a range of pressures from ambient to 345 MPa. The technique combines the use of a low loading density combustion bomb with a high loading density closed bomb technique. A series of nine ammonium perchlorate (AP) based propellants were used to demonstrate the use of the technique, and the results were compared to the neat AP burning rate ¤barrier.¥ The effect of plasticizer, oxidizer particle size, catalyst, and binder type were investigated.

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“…For our purposes, the scale of irregularity is determined by the scale that can be sensed by an advancing flame. The frangibility test (shotgun test) [45] has been used to characterize propellant or explosive response to mechanical insult. Results of that test can be used to determine the specific surface area.…”

Section: Calculation Of Burning After Ignitionmentioning

confidence: 99%

“…We have chosen "reasonable" values for the two parameters, but there are no data. In principle, frangibility tests can be performed on explosives, and in practice they are sometimes tested [45]. In general, explosives are more difficult to ignite than propellants [45] so that the early pressure history recorded in these tests can be affected by the increased amount ignition aid needed to start the fragments burning.…”

Section: Calculation Of Burning After Ignitionmentioning

confidence: 99%

“…In principle, frangibility tests can be performed on explosives, and in practice they are sometimes tested [45]. In general, explosives are more difficult to ignite than propellants [45] so that the early pressure history recorded in these tests can be affected by the increased amount ignition aid needed to start the fragments burning. Recent observations of quasi-static damage [39] suggest that high confining pressure may significantly reduce the surface area developed with plastic strain.…”

Section: Calculation Of Burning After Ignitionmentioning

confidence: 99%

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HERMES: A Model to Describe Deformation, Burning, Explosion, and Detonation

Reaugh¹

2011

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Assessment of Mechanically Induced Damage in Solid Energetic Materials

Cited by 4 publications

References 0 publications

A Computer Model to Study the Response of Energetic Materials to a Range of Dynamic Loads

A Computer Model to Study the Response of Energetic Materials to a Range of Dynamic Loads

High-pressure burning rate studies of solid rocket propellants

HERMES: A Model to Describe Deformation, Burning, Explosion, and Detonation

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