Tailored ramp wave generation in gas gun experiments
1 AWE Plc, Aldermaston, Reading RG7 4PR, UK
2 Institute of Shock Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
a Corresponding author: firstname.lastname@example.org
Published online: 7 September 2015
Gas guns are traditionally used as platforms to introduce a planar shock wave to a material using plate impact methods, generating states on the Hugoniot. The ability to deliver a ramp wave to a target during a gas gun experiment enables access to different regions of the equation-of-state surface, making it a valuable technique for characterising material behaviour. Previous techniques have relied on the use of multi-material impactors to generate a density gradient, which can be complex to manufacture. In this paper we describe the use of an additively manufactured steel component consisting of an array of tapered spikes which can deliver a ramp wave over ∼ 2 μs. The ability to tailor the input wave by varying the component design is discussed, an approach which makes use of the design freedom offered by additive manufacturing techniques to rapidly iterate the spike profile. Results from gas gun experiments are presented to evaluate the technique, and compared with 3D hydrodynamic simulations.
© Owned by the authors, published by EDP Sciences, 2015
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