Particle size effects on the mechanical properties of a polymer bonded explosive

Siviour, Clive R.; Gifford, M. J.; Walley, S. M.; Proud, W. G.; Field, J. E.

doi:10.1023/b:jmsc.0000013883.45092.45

Cited by 109 publications

(76 citation statements)

References 6 publications

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“…This behaviour is similar to that observed in other particulate composites [36,37]. There are several explanations for the strengthening effect of smaller particles.…”

Section: (C) Comparison Of Extruded and Cast-cure Compositessupporting

confidence: 88%

Mechanics of particulate composites with glassy polymer binders in compression

Jordan

Spowart

Kendall

et al. 2014

Phil. Trans. R. Soc. A.

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Whether used as structural components in design or matrix materials for composites, the mechanical properties of polymers are increasingly important. The compressive response of extruded polymethyl methacrylate (PMMA) rod with aligned polymer chains and Al–Ni–PMMA particulate composites are investigated across a range of strain rates and temperatures. The particulate composites were prepared using an injection-moulding technique resulting in highly anisotropic microstructures. The mechanics of these materials are discussed in the light of theories of deformation for glassy polymers. The experimental data from this study are compared with PMMA results from the literature as well as epoxy-based composites with identical particulates. The PMMA exhibited the expected strain rate and temperature dependence and brittle failure was observed at the highest strain rates and lowest temperatures. The Al–Ni–PMMA composites were found to have similar stress–strain response to the PMMA with reduced strain softening after yield. Increasing volume fraction of particulates in the composite resulted in decreased strength.

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“…This behaviour is similar to that observed in other particulate composites [36,37]. There are several explanations for the strengthening effect of smaller particles.…”

Section: (C) Comparison Of Extruded and Cast-cure Compositessupporting

confidence: 88%

Mechanics of particulate composites with glassy polymer binders in compression

Jordan

Spowart

Kendall

et al. 2014

Phil. Trans. R. Soc. A.

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“…The wide application of hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine (RDX) has prompted vigorous efforts to understand and improve its safety [1][2][3][4][5] . Among the factors influencing the safety of explosives (especially RDX), such as physical and chemical structures, charge diameters and density, etc, size and size distribution of explosives particles play a significant role, but the specific influences of size and size distribution on safety properties are unclear 6 .…”

Section: Introductionmentioning

confidence: 99%

Dependence of Particle Size and Size Distribution on Mechanical Sensitivity and Thermal Stability of Hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine

Song¹

2009

DSJ

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Two kinds of RDX samples, with broad and narrow particle size distribution, have been fabricated by wet riddling and solvent/non-solvent methods, respectively. By controlling the technical condition, the RDX powders with different particle sizes were obtained for each sample. All samples were characterised by laser granularity measurement and scanning electron microscope (SEM). Using mechanical sensitivity tests, slow cook-off test and differential scanning calorimetry (DSC), the mechanical safety and thermal stability of RDX samples, depending on the particle sizes and size distribution, were studied. Results indicated that, for each kind of RDX particles, the mechanical sensitivity and thermal stability of samples changed according to the particle size. However, although two samples had almost the same average particle size, their safety changed when two particle size distributions differed. Concretely, the mechanical sensitivity of RDX reduced and their thermal stability increased gradually along with the decreasing of particle size. Meanwhile, RDX with broad size distribution had higher mechanical sensitivity and thermal stability than samples with narrow size distribution.

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“…PBSs allow safe investigation of the effect of various parameters, such as particle size and distribution, on mechanical properties [40][41][42][43] . These parameters are of interest as they are known to affect the material strength of a PBX [44][45][46] .…”

Section: Why Study the Response Of Explosives To Impact?mentioning

confidence: 99%

The use of digital speckle radiography to study the ballistic deformation of a polymer bonded sugar (an explosive simulant)

Prentice

Proud

Walley

et al. 2010

International Journal of Impact Engineering

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This paper reports an initial study into the benefits of determining two-dimensional flow fields for low velocity impact on a small-scale model of explosive reactive armour (ERA) using digital speckle radiography (DSR). The model system consisted of a polymer-bonded sugar (PBS) (otherwise known as a sugarmock) confined between two mild steel plates. The DSR technique relies upon creating a layer within the specimen that is seeded with lead particles. So although radiography itself is mechanically non-invasive, the lead layer needed may change the mechanical properties of the material. DSR revealed where regions of intense shear occurred in normal impact. These regions are likely to be where a polymer-bonded explosive (PBX) would initiate.

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Particle size effects on the mechanical properties of a polymer bonded explosive

Cited by 109 publications

References 6 publications

Mechanics of particulate composites with glassy polymer binders in compression

Mechanics of particulate composites with glassy polymer binders in compression

Dependence of Particle Size and Size Distribution on Mechanical Sensitivity and Thermal Stability of Hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine

The use of digital speckle radiography to study the ballistic deformation of a polymer bonded sugar (an explosive simulant)

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