Shock Response of Polymethyl Methacrylate (PMMA) Under Explosive Loading

Journal of Dynamic Behavior of Materials
S. M. Torres1, Michael Hargather1, Jamie Kimberley1, R. E. Robey2
1Mechanical Engineering, New Mexico Tech, 801 Leroy Pl., Socorro, NM, 87801, USA
2Sandia National Labs, Albuquerque, NM 87185, USA

Tóm tắt

AbstractThe dynamic response of polymethyl methacrylate (PMMA) is well understood for one-dimensional planar impact shocks, but limited research has been performed on the response of PMMA under spherical shock loading. In this work, the shock decay of an explosively-driven shock wave into PMMA was experimentally measured. PMMA cubes of various geometries were explosively loaded with an RP-80 detonator to produce the explosive shock wave. High-speed schlieren imaging was implemented to measure the explosively-driven shock wave velocity throughout the PMMA cubes. Photon Doppler velocimetry (PDV) was used to measure the particle velocity imparted by the shock wave at the surface of the cubes. The material shock response was studied at distances from 21.91 to 133.3 mm from the explosive source. The particle velocity history measured by PDV was compared to the wave profile visualized in the high-speed images. The shock wave pulse amplitude decreased with increased distance from the source. The conducted experiments extend the PMMA shock Hugoniot relating to the lower shock and particle velocity regime.

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Journal of Dynamic Behavior of Materials

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