Computational study of ignition behavior and hotspot dynamics of a potential class of aluminized explosives

Roy, Ushasi; Kim, Seokpum; Miller, Christopher; Horie, Yasuyuki; Zhou, Min

doi:10.1088/1361-651X/aae402

Computational study of ignition behavior and hotspot dynamics of a potential class of aluminized explosives

Journal Article · Wed Oct 24 00:00:00 EDT 2018 · Modelling and Simulation in Materials Science and Engineering

DOI:https://doi.org/10.1088/1361-651X/aae402· OSTI ID:1560512

Roy, Ushasi ^[1]; ^[2]; Miller, Christopher ^[1]; Horie, Yasuyuki ^[3]; Zhou, Min ^[1]

Georgia Inst. of Technology, Atlanta, GA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Air Force Research Lab, Eglin AFB, FL (United States)

The ignition behavior and hotspot dynamics of a potential class of aluminized energetic materials are studied computationally. The materials consist of HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) grains embedded in an aluminum matrix and, henceforth referred to as metal–matrix explosives (MMXs). For the analysis, two different MMXs, the soft MMX with a matrix of 1100 Al alloy and the hard MMX with a matrix of 7075 T651 Al alloy are considered. The thermo-mechanical response of the MMXs are computationally analyzed by subjecting them to monotonic impact loading using a Lagrangian cohesive finite element framework, with their ignition behavior analyzed through characterization of hotspots. For comparison, a polymer-bonded explosive (PBX) consisting of HMX and Estane is also analyzed under the same conditions. Here, the results show that the MMXs have significantly lower propensity for ignition and higher structural integrity than the PBX over the loading velocity range of 200–500 m s^-1.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1560512

Journal Information:: Modelling and Simulation in Materials Science and Engineering, Journal Name: Modelling and Simulation in Materials Science and Engineering Journal Issue: 8 Vol. 26; ISSN 0965-0393

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Computational study of ignition behavior and hotspot dynamics of a potential class of aluminized explosives

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