Simulation and Fabrication of Reactive Metamaterials

Simulations and experiments were conducted to control the shock to detonation transition (SDT) by energy trapping within reactive metamaterials. Simulations carried out in ALE3D were used as a framework for designing high impedance inclusions within the system. High explosive ignition and growth reactive flow modeling demonstrated enhanced reactivity under shock loading conditions that would not induce a detonation. Reactive metamaterials were fabricated by utilizing additive manufacturing to engineer structures within the homogeneous energetic material nitromethane. Experiments were conducted using Fritz plane wave lenses to drive various input shocks into the system. Photon doppler velocimetry was the primary diagnostic used to measure shock input and reaction progression. Systems that normally would not detonate underwent SDT with the inclusion of high impedance particles.