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Title: Thermal conductivity of energetic materials

Abstract

Here, thermal conductivity has been confirmed for a variety of energetic materials (EMs) using finite element analysis (FEA) and cookoff data from the Sandia Instrumented Thermal Ignition (SITI) experiment. Materials studied include melt-cast, pressed, and low-density explosives. The low-density explosives were either prills or powders with some experiments run at pour density (not pressed). We have viewed several of our thermal conductivities with those in the literature as well as investigated contact resistance between the confining aluminum and explosive, multidimensional heat transfer effects, and uncertainty in the thermocouple bead positions. We have determined that contact resistance is minimal in the SITI experiment, the heat transfer along the midplane is one-dimensional, and that uncertainty in the thermocouple location is greatest near the heated boundary. Our values of thermal conductivity can be used with kinetic mechanisms to accurately predict thermal profiles and energy dissipation during the cookoff of explosives.

Authors:
 [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1574453
Report Number(s):
SAND-2019-12454J
Journal ID: ISSN 0737-0652; 680375
Grant/Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Energetic Materials
Additional Journal Information:
Journal Name: Journal of Energetic Materials; Journal ID: ISSN 0737-0652
Publisher:
Taylor & Francis
Country of Publication:
United States
Language:
English
Subject:
Thermal Conductivity; Energetic Materials; TeflonTM; Finite Element Analysis; Contact Resistance

Citation Formats

Lawless, Zachary D., Hobbs, Michael L., and Kaneshige, Michael J. Thermal conductivity of energetic materials. United States: N. p., 2019. Web. doi:10.1080/07370652.2019.1679285.
Lawless, Zachary D., Hobbs, Michael L., & Kaneshige, Michael J. Thermal conductivity of energetic materials. United States. doi:10.1080/07370652.2019.1679285.
Lawless, Zachary D., Hobbs, Michael L., and Kaneshige, Michael J. Wed . "Thermal conductivity of energetic materials". United States. doi:10.1080/07370652.2019.1679285.
@article{osti_1574453,
title = {Thermal conductivity of energetic materials},
author = {Lawless, Zachary D. and Hobbs, Michael L. and Kaneshige, Michael J.},
abstractNote = {Here, thermal conductivity has been confirmed for a variety of energetic materials (EMs) using finite element analysis (FEA) and cookoff data from the Sandia Instrumented Thermal Ignition (SITI) experiment. Materials studied include melt-cast, pressed, and low-density explosives. The low-density explosives were either prills or powders with some experiments run at pour density (not pressed). We have viewed several of our thermal conductivities with those in the literature as well as investigated contact resistance between the confining aluminum and explosive, multidimensional heat transfer effects, and uncertainty in the thermocouple bead positions. We have determined that contact resistance is minimal in the SITI experiment, the heat transfer along the midplane is one-dimensional, and that uncertainty in the thermocouple location is greatest near the heated boundary. Our values of thermal conductivity can be used with kinetic mechanisms to accurately predict thermal profiles and energy dissipation during the cookoff of explosives.},
doi = {10.1080/07370652.2019.1679285},
journal = {Journal of Energetic Materials},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}

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