Effect of microstructure on the coupled electromagnetic-thermo-mechanical response of cyclotrimethylenetrinitramine-estane energetic aggregates to infrared laser radiation

Brown, Judith A.

doi:10.1063/1.4931379

Title: Effect of microstructure on the coupled electromagnetic-thermo-mechanical response of cyclotrimethylenetrinitramine-estane energetic aggregates to infrared laser radiation

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Abstract

The coupled electromagnetic (EM)-thermo-mechanical response of cyclotrimethylenetrinitramine-estane energetic aggregates under laser irradiation and high strain rate loads has been investigated for various aggregate sizes and binder volume fractions. The cyclotrimethylenetrinitramine (RDX) crystals are modeled with a dislocation density-based crystalline plasticity formulation and the estane binder is modeled with finite viscoelasticity through a nonlinear finite element approach that couples EM wave propagation with laser heat absorption, thermal conduction, and inelastic deformation. Material property and local behavior mismatch at the crystal-binder interfaces resulted in geometric scattering of the EM wave, electric field and laser heating localization, high stress gradients, dislocation density, and crystalline shear slip accumulation. Viscous sliding in the binder was another energy dissipation mechanism that reduced stresses in aggregates with thicker binder ligaments and larger binder volume fractions. This investigation indicates the complex interactions between EM waves and mechanical behavior, for accurate predictions of laser irradiation of heterogeneous materials.

Authors:: Brown, Judith A.

Publication Date:: Mon Sep 28 00:00:00 EDT 2015

OSTI Identifier:: 22492739

Resource Type:: Journal Article

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 118; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; BINDERS; CRYSTALS; DEFORMATION; DISLOCATIONS; FINITE ELEMENT METHOD; INTERFACES; LASER RADIATION; LASER-RADIATION HEATING; MICROSTRUCTURE; PLASTICITY; SCATTERING; SHEAR; SLIP; STRAIN RATE; STRESSES; THERMAL CONDUCTION; WAVE PROPAGATION

Citation Formats


                    Brown, Judith A., and Zikry, M. A., E-mail: zikry@ncsu.edu. Effect of microstructure on the coupled electromagnetic-thermo-mechanical response of cyclotrimethylenetrinitramine-estane energetic aggregates to infrared laser radiation.  United States: N. p., 2015. 
        Web.  doi:10.1063/1.4931379.

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                    Brown, Judith A., & Zikry, M. A., E-mail: zikry@ncsu.edu. Effect of microstructure on the coupled electromagnetic-thermo-mechanical response of cyclotrimethylenetrinitramine-estane energetic aggregates to infrared laser radiation.  United States.  https://doi.org/10.1063/1.4931379

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                    Brown, Judith A., and Zikry, M. A., E-mail: zikry@ncsu.edu. 2015.  
        "Effect of microstructure on the coupled electromagnetic-thermo-mechanical response of cyclotrimethylenetrinitramine-estane energetic aggregates to infrared laser radiation".  United States.  https://doi.org/10.1063/1.4931379.

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@article{osti_22492739,

  title        = {Effect of microstructure on the coupled electromagnetic-thermo-mechanical response of cyclotrimethylenetrinitramine-estane energetic aggregates to infrared laser radiation},

  author       = {Brown, Judith A. and Zikry, M. A., E-mail: zikry@ncsu.edu},

  abstractNote = {The coupled electromagnetic (EM)-thermo-mechanical response of cyclotrimethylenetrinitramine-estane energetic aggregates under laser irradiation and high strain rate loads has been investigated for various aggregate sizes and binder volume fractions. The cyclotrimethylenetrinitramine (RDX) crystals are modeled with a dislocation density-based crystalline plasticity formulation and the estane binder is modeled with finite viscoelasticity through a nonlinear finite element approach that couples EM wave propagation with laser heat absorption, thermal conduction, and inelastic deformation. Material property and local behavior mismatch at the crystal-binder interfaces resulted in geometric scattering of the EM wave, electric field and laser heating localization, high stress gradients, dislocation density, and crystalline shear slip accumulation. Viscous sliding in the binder was another energy dissipation mechanism that reduced stresses in aggregates with thicker binder ligaments and larger binder volume fractions. This investigation indicates the complex interactions between EM waves and mechanical behavior, for accurate predictions of laser irradiation of heterogeneous materials.},

  doi          = {10.1063/1.4931379},

  url          = {https://www.osti.gov/biblio/22492739},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 12,

  volume       = 118,

  place        = {United States},

  year         = {Mon Sep 28 00:00:00 EDT 2015},

  month        = {Mon Sep 28 00:00:00 EDT 2015}

}

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