Pore Collapse in Single-Crystal TATB Under Shock Compression

MD Nelms and MP Kroonblawd and RA Austin, SHOCK COMPRESSION OF CONDENSED MATTER - 2019, 2272, 050001 (2020).

DOI: 10.1063/12.0000955

A fundamental understanding of the shock wave initiation of heterogeneous high explosive materials is lacking. This is due to the complexity of physics and chemistry involved and the time/length scales at which key processes occur, notably the heating generated by mechanical deformation. In this work, we present a preliminary model of the elastic/plastic behavior of single-crystal TATB, which serves as the energetic component in various high explosive formulations. The model is utilized in continuum simulations of TATB shock compression and pore collapse, which is thought to be an important energy localization mechanism in the shock initiation process. The sensitivity of energy localization to the form and parameterization of the flow kinetics model is investigated. The calculations indicate that the limiting behavior of slip kinetics at high strain rates can have a significant influence on the character and morphology of the collapsing cavity and the extent of energy localization in its vicinity.

Return to Publications page