Dynamic behavior of particulate/porous energetic materials

Nesterenko, V. F.; Chiu, Po-Hsun; Braithwaite, C. H.; Collins, Adam; Williamson, David M.; Olney, Karl; McKenzie, Francesca

doi:10.1063/1.3686334

Cited by 14 publications

(11 citation statements)

References 14 publications

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“…In experimental samples [19,20], the W components have three-dimensional interactions which help resist the complete disintegration of the sample which is seen in the two-dimensional simulations.…”

Section: The Role Of Bonding In Samples Wih Similar Sized Al and W Comentioning

confidence: 95%

Modeling shear instability and fracture in dynamically deformed Al/W granular composites

Olney

Nesterenko

2012

AIP Conference Proceedings

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Abstract. Aluminum/Tungsten granular composites are materials which combine high density and strength with bulk distributed fracture of Al matrix into small particles under impact or shock loading. They are processed using cold and hot isostatic pressing of W particles/rods in the matrix of Al powder. Numerical models were used to elucidate the dynamic behavior of these materials under dynamic conditions simulating low velocity high energy impact in drop weight test (10 m/s). It was demonstrated that arrangement of W components and bonding between Al particles dramatically affect the samples shear localization and mode of fracture of the Al matrix in agreement with experiments.

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Section: The Role Of Bonding In Samples Wih Similar Sized Al and W Comentioning

confidence: 95%

Modeling shear instability and fracture in dynamically deformed Al/W granular composites

Olney

Nesterenko

2012

AIP Conference Proceedings

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“…High speed photography is conducted parallel to the cylinder axis through the setup shown in Figure 3(b). The radial expansion velocity of the ring is measured by a PDV system [15] with the probe being a bare fiber placed approximately 3-5 mm from the ring.…”

Section: B Expanding Ring Techniquementioning

confidence: 99%

Fragmentation and constitutive response of tailored mesostructured aluminum compacts

Marquez

Braithwaite²,

Weihs

et al. 2016

Journal of Applied Physics

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The fragmentation and constitutive response of aluminum-based compacts was examined under dynamic conditions using mesostructured powder compacts in which the interfaces between the powders (sizes of 40, 100, and 400 μm) were tailored during the swaging fabrication process. Fragmentation was induced in ring samples of this material through explosive loading and was examined through high speed photography, laser interferometry and soft capture of fragments. Fragment velocities of around 100 m/s were recorded. The fragment mass distributions obtained correlated in general with the interfacial strength of the compacts as well as with powder size. Experimental results are compared with fragmentation theories to characterize the behavior of reactive powders based on the material's mesostructure by introducing the fracture toughness of the compacts. The mean fragment size is calculated using a modified form of Mott's theory and successfully compared with experimental results.

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“…More recently, control of fragmentation of the RSM was attempted by varying the particle size and, even more interestingly, structure of the composite material, which can be changed replacing a powder with fibers . Composites with tungsten fibers embedded in aluminum were prepared using a combination of cold isostatic pressing (CIP) and HIP, which could be followed by an additional heat treatment to harden the aluminum matrix .…”

Section: Structures Of Rsm and Methods Of Their Preparationmentioning

confidence: 99%

Reactive Structural Materials: Preparation and Characterization

Hastings

Dreizin

2017

Adv Eng Mater

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Reactive structural materials, which can serve both as structural elements as well as a source of chemical energy released upon initiation have emerged as an important class of metal-based composites for use in various energetic systems. Such materials rely on a variety of exothermic reactions, from oxidation to formation of metal-metalloid and intermetallic phases. The rates of these reactions are as important as the energy that may be released, in order for them to occur at the time scales compatible with the requirements of applications. Therefore, chemical composition, scale at which reactive components are mixed, and the structure and morphology of materials are important and can be controlled by the method of preparation and compaction of the composite materials. Methods of preparation of the composite structures are briefly reviewed as well as methods of characterization of their mechanical and energetic properties. In addition to common thermo-analytical and static mechanical property measurements, dynamic tests of mechanical properties as well as ignition and combustion experiments are necessary to understand the fragmentation, initiation, and heat release expected for these materials when they are stimulated by an impact, shock, or rapid heating. Reaction mechanisms are studied presently for the thin layers and small samples of reactive materials initiated in carefully designed experiments. In other experiments, impact and explosive initiation are characterized for larger material compacts in the conditions imitating practical scenarios. Examples of results describing thermal, impact, and explosive initiation of some of the reactive materials are presented.

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Dynamic behavior of particulate/porous energetic materials

Cited by 14 publications

References 14 publications

Modeling shear instability and fracture in dynamically deformed Al/W granular composites

Modeling shear instability and fracture in dynamically deformed Al/W granular composites

Fragmentation and constitutive response of tailored mesostructured aluminum compacts

Reactive Structural Materials: Preparation and Characterization

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