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Energy dispersion in shocked materials

ORAL

Abstract

Shock waves typically impart significant energy to a solid material within a very short time interval. The energy input to the material is generally dissipated through different defect formations (point defects, line defects – dislocations, twins) in the crystal lattice, conformational changes within a polymer/chain-like material, phase transformations (solid-solid, solid-fluid), and chemical reactions (for multicomponent materials). Apart from these observable microstructural changes within the solid material, the material also demonstrates an increase in temperature, which depends not only on the lattice or molecular vibrations but also on electronic contributions. The presentation, built upon previously published work by the author, will demonstrate shocked responses on different classes of materials ranging from metals (FCC, BCC, HCP) with a periodic crystal structure to polymers (comprised of chain-like molecular conformations).

Publication: Rawat, S., Mitra, N. (2025). "Orientational anisotropy in shocked Nb crystals" submitted to Journal of Applied Physics.<br>Prasad, D., Mitra, N. (2024). "Non-covalent interactions in mechanical response of thermoset epoxy resin." Journal of Physical Chemistry B. 128(10): 2537-2549.<br>Rawat, S., Mitra, N. (2021). "{10-12} twinning in single crystal titanium under shock loading" Philosophical Magazine, 101(7): 836-850.<br>Dey, U., Mitra, N., and Taraphder, A. (2019). "High temperature - High pressure phase transformation of Cu." Computational Materials Science, 170, 109154.<br>Bisht, A., Neogi, A., Mitra, N., Jagadeesh, G., Suwas, S. (2019). "Investigation of the elastically shock-compressed region and elastic-plastic shock transition in single crystalline copper to understand the dislocation nucleation mechanism under shock compression." Shock Waves, 29(7), 913-927.<br>Neogi, A., Mitra, N. (2017). "A metastable phase of shocked bulk single crystal copper: an atomistic simulation study." Scientific Reports. 7, 7337. <br>Neogi, A., Mitra, N. (2017). "Shock induced deformation response of single crystal copper: Effect of crystallographic orientations." Computational Materials Science. 135, 141-151. <br>Neogi, A., Mitra, N. (2017). "Evolution of dislocation mechanism in single crystal Cu under shock loading in different directions." Modelling and Simulation in Materials Science and Engineering. 25, 025013<br>Neogi, A., Mitra, N. (2016). "Shock compression of poly-vinyl-chloride." Journal of Applied Physics. 119, 165903. <br>Neogi, A., Mitra N. (2014). "On shock response of nano-void closed/open cell Copper material: Non-equilibrium molecular dynamic simulations." Journal of Applied Physics, 115(1), 013504

Presenters

  • Nilanjan Mitra

    Johns Hopkins University

Authors

  • Nilanjan Mitra

    Johns Hopkins University