Hopkinson bar experimental technique: A critical review

Author:

Gama Bazle A1,Lopatnikov Sergey L2,Gillespie John W3

Affiliation:

1. Department of Materials Science and Engineering, University of Delaware–Center for Composite Materials (UD-CCM), Newark DE 19716; gama@ccm.udel.edu

2. Department of Civil and Environmental Engineering, University of Delaware–Center for Composite Materials (UD-CCM), Newark DE 19716; lopatnik@ccm.udel.edu

3. Department of Materials Science and Engineering, Department of Civil and Environmental Engineering, University of Delaware–Center for Composite Materials (UD-CCM), Newark DE 19716; gillespie@ccm.udel.edu

Abstract

A critical review of three classic papers by B Hopkinson, RM Davies, and H Kolsky, and the state-of-the-art in Hopkinson bar experimental techniques is presented. The validity and applicability of the assumption made in the 1D Hopkinson bar theory are discussed. Fundamentals of the Hopkinson bar experimental procedure are outlined including bar calibration, specimen design, pulse shaping, and data analysis following the essential dispersion correction methodology. Additional data tables necessary for dispersion correction are provided to cover a wide range of Poisson’s ratio. In addition to the elastic-plastic metals, methodologies for soft and hard materials are also discussed. This paper provides the necessary information for conducting a Hopkinson bar experiment and analyzing the experimental data. This review article cites 61 references.

Publisher

ASME International

Subject

Mechanical Engineering

Reference61 articles.

1. Hopkinson J (1901), On the rupture of iron wire by a blow (1872), Article 38, Original Papers-by the late John Hopkinson, Vol II, Scientific Papers, B Hopkinson (ed), Cambridge Univ Press, 316–320.

2. Hopkinson J (1901), Further experiments on the rupture of iron wire (1872), Article 39, Original Papers-by the late John Hopkison, Vol II, Scientific Papers, B Hopkinson (ed), Cambridge Univ Press, 316–320.

3. Hopkinson B (1904–1905), The Effects of Momentary Stresses in Metals, Proc. R. Soc. London, Ser. A 74, 498–506.

4. Hopkinson B (1914), A method of measuring the pressure produced in the detonation of high explosives or by the impact of bullets, Philos. Trans. R. Soc. London, Ser. A 213, 437–456.

5. Davies RM (1948), A critical study of the Hopkinson pressure bar, Philos. Trans. R. Soc. London, Ser. A 240(821), 375–457.

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