Strength effects in an imploding cylinder with constant mass-to-explosive loading

18th APS-SCCM; 24th AIRAPT

Serge, M.^1 ; Petel, O.E.^2 ; Loiseau, J.^1 ; Higgins, A.J.^1

Mechanical Engineering Department, McGill University, Montreal

QC

H3A 0C3, Canada^1

Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa

ON

K1S 5B6, Canada^2

关键词: Detonation pressure;    Explosive loadings;    High explosives;    Inner surfaces;    Maximum velocity;    Metal cylinders;    Photonic doppler velocimetry;    Time constants;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/11/112058/pdf
DOI  :  10.1088/1742-6596/500/11/112058

来源: IOP

【 摘 要 】

High explosives were used to implode thin-walled metal cylinders of different strengths (Al 6061-O, Al 6061-T6, mild steel, and stainless steel) at a constant mass-to-explosive (M/C) ratio. The velocity history of the inner surface of the imploding cylinder was measured via photonic Doppler velocimetry. These histories and maximum velocities were compared to an imploding Gurney model that used a detonation pressure-based time constant, giving good agreement with the experiments. The deceleration caused by strength effects was modeled via a simplified stress-strain curve, which was then used to predict the entire velocity history.