Air blast characteristics of laminated al and NI-AL casings

Zhang, Fan; Ripley, Robert C.; Wilson, William S.

doi:10.1063/1.3686272

Cited by 5 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A large porosity, however, results in a deficit in TMD, thus leading to a low mechanical strength [5], which conflicts with the definition of a SRM solid. From the intrinsic grainscale properties of dissimilarity and reactivity, fine fragmentation mechanisms have been proposed, using structural discontinuity and impedance mismatch within a SRM solid of multiple dissimilar materials [6][7][8][9], and a reactive hot spot concept.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Fragmentation and Blast from a Reactive Material Solid

Zhang

Gauthier

Cojocaru

2017

Prop., Explos., Pyrotech.

Self Cite

View full text Add to dashboard Cite

Structural reactive material (SRM) is consolidated from a fine granular mixture of reactive materials towards the mixture theoretical maximum density with little porosity, thus bearing both high energy density and mechanical strength. A reactive hot spot concept was investigated for fine fragmentation of a SRM solid under explosive loading to augment air blast through rapid reaction of fine SRM fragments. In this concept, micro‐sized reactive materials were distributed in a fuel‐rich SRM solid, such as MoO3 particles consolidated in a particulate aluminum base in 10Al+MoO3. Intermetallic reactions of micro‐sized MoO3 and nearby Al under explosive loading created heat and gas products to form microscale hot spots that initiated local fractures leading to fine fragments of the rest of Al. The SRM solid was made of a thick‐walled cylindrical casing, containing a high explosive in a detonation pressure range of 25–34 GPa with a casing‐to‐explosive mass ratio of 1.78. Experiments in a cylindrical chamber demonstrated the presence of a large amount of fine SRM fragments, whose reaction promptly after detonation significantly enhanced the primary and near field blast wave, as compared to the results from a baseline pure Al‐cased charge, thus indicating the feasibility of the concept.

show abstract

Section: Introductionmentioning

confidence: 99%

Dynamic Fragmentation and Blast from a Reactive Material Solid

Zhang

Gauthier

Cojocaru

2017

Prop., Explos., Pyrotech.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Reactive Structural Materials (RSMs) are a relatively new group of materials designed to have structural strength and store energy to be released at a desired time . Their typical applications are expected in such systems as kinetic penetrators, reactive fragments, reactive bullets, reactive armor, and munition casings . Considering that most structural components in various munitions are based on steel, the utility of RSMs can be semi‐quantitatively assessed from a diagram shown in Figure .…”

Section: Introductionmentioning

confidence: 99%

Reactive Structural Materials: Preparation and Characterization

Hastings

Dreizin

2017

Adv Eng Mater

View full text Add to dashboard Cite

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.

show abstract

“…The behavior of a laminate casing made from concentric Ni and Al layers under inner explosive loading was investigated in Ref. 28.…”

mentioning

confidence: 99%

The mechanism of instability and localized reaction in the explosively driven collapse of thick walled Ni-Al laminate cylinders

Chiu

Olney

Higgins

et al. 2013

Applied Physics Letters

View full text Add to dashboard Cite

Thick-walled cylinders constructed from alternating concentric layers of Ni and Al foils were explosively collapsed. The prevalent mode of the high strain, high strain rate plastic deformation was the cooperative buckling of the foils originating in the interior layers. This phenomenon was reproduced in numerical simulations. Its mechanism is qualitatively different than that of shear localization seen in all previously investigated homogeneous solid and granular materials and from the independent buckling of single thin-walled cylinders. Localized chemical reactions were observed in the apex areas of the Ni foils, consistent with the localization of temperature due to high strain plastic deformation.

show abstract

Air blast characteristics of laminated al and NI-AL casings

Cited by 5 publications

References 4 publications

Dynamic Fragmentation and Blast from a Reactive Material Solid

Dynamic Fragmentation and Blast from a Reactive Material Solid

Reactive Structural Materials: Preparation and Characterization

The mechanism of instability and localized reaction in the explosively driven collapse of thick walled Ni-Al laminate cylinders

Contact Info

Product

Resources

About