Experimental Techniques and Measurements in Impact Engineering Using Hopkinson Bar Technique

Abstract:

In the paper, experimental analysis of dynamic plastic behaviour of different structural materials at high and very high strain rates up to 10⁵ s^-1 in various modes at lowered, room and elevated temperatures, is presented. The paper describes laboratory set ups for testing material specimens, based on various modifications of the Hopkinson bar technique. The paper focuses the attention on experimental tests and their interpretation. The results reported here will be useful for the designers working on the dynamic behaviour of building and mechanical protective structures made of different materials such as steels, aluminium alloys, ceramic and sand bricks, mortars, woods (pine, birch and aspen), ceramics and concrete fireproof and soils (sand, clay and sandy soil clay).

• Periodical: Key Engineering Materials (Volume 715)
• Pages: 3-12
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.715.3
• Online since: September 2016
• Authors: Leopold Kruszka*
• Keywords: Dynamic Testing, Hopkinson Bar

References

[1] B. Hopkinson, A method of measuring the pressure produced in the detonation of high explosives or by the impact of bullets, Philosophical Transactions of the Royal Society A, 213 (1914) 437-456.

DOI: 10.1098/rsta.1914.0010

[2] H. Kolsky, An investigation of the mechanical properties of materials at very high rates of loading, Proceedings of the Physical Society, 62B (1949) 676-700.

DOI: 10.1088/0370-1301/62/11/302

[3] A.M. Bragov, P.V. Demenko, A.K. Lomunov, I.V. Sergeichev, L. Kruszka, Investigation of behavior of the materials of different physical nature using the Kolsky method and its modifications, (Chapter 9. 1), in: New Experimental Methods in Material Dynamics and Impact, W. K. Nowacki and J. R. Klepaczko Eds., Series: Trends in Mechanics of Materials. Volume 3, Centre of Excellence for Advanced Materials and Structures, Polish Academy of Sciences, Warsaw (2001).

[4] J.Z. Malinowski, Z.L. Kowalewski, L. Kruszka, Modification of the experimental method of the direct impact for determination viscoplastic properties of metals in the field of very high strain rates in Polish), Proceedings of 21st Symposium on Experimental Mechanics of Solids, Jachranka, Poland, October 13-16, (2004).

[5] L. Kruszka, Z. Kowalewski, W. Moćko, M. Grązka, Experimental analysis of dynamic plastic behaviour of materials by the Hopkinson bar technique, Proceedings of PLASTICITY'13: The 19th International Symposium on Plasticity and its Current Applications, Nassau, Bahamas, January 3-8 (2013).

[6] L. Kruszka, L. Anaszkiewicz, J. Janiszewski, M. Grazka, Ballistics Experimental and numerical analysis of Al6063 duralumin using Taylor impact test, Proceedings of 10th International Conference on the Mechanical and Physical Behavior of Materials under Dynamic Loading, Freiburg, Germany, September 2-7 (2012).

DOI: 10.1051/epjconf/20122601062

[7] A.M. Bragow, A.K. Łomunow, R. Chmielewski, L. Kruszka, Study of dynamic properties of selected soils at high rate of loading (in Polish), Biuletyn WAT, Nr LI (2002), 59–72.