19.5 Conclusions A methodology is presented for high-speed shadowgraph image analysis, 3D DIC, and PDV during terminal ballistic impacts. The approach shows great promise for being applied to hypervelocity ballistic impact problems in the 1.5–2.5 km/ s regime. The general principles of the technique are easily scalable into the hypervelocity range, especially given that highspeed cameras are easily capable of attaining frame rates of 5–10 Mfps (0.1–0.2 microseconds interframe times). The experimental framework presented may be utilized to provide time-resolved measurements of both the displacement- and velocity-fields (2D and 3D), as well as displacement- and velocity-time histories at any point of interest. In future investigations, the approach will be refined to use PDV to also measure projectile deceleration on the impact side of the metal target, include a wider range of striking velocities from 1 to more than 2 km/s, investigate target thickness to projectile diameter ratios of 0.5–2, and investigate a wide range of plate materials. References 1. Tiwari, V., Sutton, M.A., McNeill, S.R., Xu, S., Deng, X., Fourney, W.L., Bretall, D.: Application of 3D image correlation for full-field transient plate deformation measurements during blast loading. International Journal of Impact Engineering 36(6), 862–874 (2009) 2. Strand, O.T., Goosman, D.R., Martinez, C., Whitworth, T.L., Kuhlow, W.W.: Compact system for high-speed velocimetry using heterodyne techniques. Review of Scientific Instruments 77, 083108 (2006) 19 Instrumented Penetration of Metal Alloys During High-Velocity Impacts 145
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