Anisotropic frictional heat dissipation in cyclotrimethylene trinitramine

ORAL

Abstract

Anisotropic frictional response and corresponding heat dissipation from different crystallographic planes of RDX crystal is studied using molecular dynamics simulations. The effect of frictional force on the nature of damage and system temperature is monitored along different directions on primary slip plane, (010), of RDX and on non-slip planes, (100) and (001). The correlation between the friction coefficient, deformation and the frictional heating in these system is determined. It is observed that friction coefficients on slip planes are smaller than those of non-slip planes. In response to friction on slip plane, RDX crystal deforms via dislocation formation and shows less heating. On non-slip planes due to the inability of the system to deform by dislocation formation, large temperature rise is observed in the system just below the contact area of two surfaces. Frictional sliding on non-slip planes also lead to the formation of damage zone just below the contact area of two surfaces due to the change in RDX ring conformation from chair to boat/half-boat.

*This research is supported by the AFOSR Grant: FA9550-16- 1-0042

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Authors

  • Pankaj Rajak

    • Univ of Southern California
    • University of Southern California

  • Rajiv Kalia

    • Univ of Southern California
    • CACS Mork Family Department of Chemical Engineering and Material Science, Department of Physics, University of Southern California
    • University of Southern California
    • CACS, Dept. of Physics & Astronomy, Dept. of Chemical Engineering & Materials Science, Dept. of Computer Science, University of Southern California
    • CACS, Department of Physics and Astronomy, Department of Chemical Engineering and Materials Science
    • Collaboratory of Advanced Computing and Simulations Department of Physics and Astronomy,University of Southern California

  • Aiichiro Nakano

    • Univ of Southern California
    • CACS Mork Family Department of Chemical Engineering and Material Science, Department of Physics, University of Southern California
    • University of Southern California
    • CACS, Dept. of Physics & Astronomy, Dept. of Chemical Engineering & Materials Science, Dept. of Computer Science, University of Southern California
    • CACS, Department of Physics and Astronomy, Department of Chemical Engineering and Materials Science
    • Collaboratory of Advanced Computing and Simulations Department of Physics and Astronomy,University of Southern California

  • Priya Vashishta

    • Univ of Southern California
    • CACS Mork Family Department of Chemical Engineering and Material Science, Department of Physics, University of Southern California
    • University of Southern California
    • CACS, Dept. of Physics & Astronomy, Dept. of Chemical Engineering & Materials Science, Dept. of Computer Science, University of Southern California
    • CACS, Depts. of Physics & Astronomy, Computer Science, and Chemical Engg. & Material Science, USC
    • CACS, Department of Physics and Astronomy, Department of Chemical Engineering and Materials Science
    • Collaboratory of Advanced Computing and Simulations Department of Physics and Astronomy,University of Southern California
    • CACS, Depts. of Physics & Astronomy, Computer Science, and Chemical Engg. and Material Science, USC