A Kolsky Bar with a 50 ns Rise-Time: Application to Rates Beyond 1 M/s
Miniature Kolsky bars, or Split Hopkinson Pressure Bars, are used to increase the strain-rate range accessible by the technique. A number of authors have developed miniature versions in both Kolsky bar and direct impact configurations (Jia and Ramesh, Exp. Mech. 44:445–454, 2004; Casem, A Small Diameter Kolsky bar for High-rate Compression, 2009; Ames, Shock compression of condenser matter, 2005; Casem et al., Exp. Mech. 52:173–184, 2012; Lea and Jardine, Int. J. Plas. 102:41–52; Casem et al., Mims High-rate Mechanical Response of Aluminum Using Miniature Kolsky Bar Techniques, 2018), and rates as high as 1 M/s have been obtained with bars as small as 127 μm diameter (Casem et al., Mims High-rate Mechanical Response of Aluminum Using Miniature Kolsky Bar Techniques, 2018). Even higher rates are possible, provided challenges related to manufacture, alignment, and instrumentation can be overcome.
KeywordsKolsky bar Split Hopkinson pressure bar Dispersion Interferometry High strain-rate
- 2.Casem, D.T.: A Small Diameter Kolsky bar for High-rate Compression. Proc. of the 2009 SEM Annual Conference and Exposition on Experimental and Applied Mechanics, Albuquerque, NM, June 1–4, (2009)Google Scholar
- 3.Ames, R.G.: Limitations of the Hopkinson Pressure Bar for High-Frequency Measurements. In: Furnish, M.D., Elert, M., Russell, T.P., White, C.T. (eds.) Shock compression of condenser matter, pp. 1233–1237 (2005)Google Scholar
- 6.Casem, D.T., Ligda, J.P., Schuster, B.E., Mims, S.: High-rate mechanical response of aluminum using miniature Kolsky bar techniques, pp. 147–153. Springer International Publishing, Cham (2018)Google Scholar