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Proceedings 2018, 2(8), 420;

Biaxial Compression Tests on Hopkinson Bars

LMT, ENS Paris-Saclay/Université Paris-Saclay/CNRS, 94235 Cachan-CEDEX, France
CEA Saclay, France
UFR Ingénierie, Université Pierre et Marie Curie, Sorbonne Universités, 75005 Paris, France
Presented at the 18th European International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018.
Author to whom correspondence should be addressed.
Published: 24 May 2018
PDF [985 KB, uploaded 11 June 2018]


A biaxial compression Hopkinson bar set-up bas been designed. It consists in a projectile, an input bar and two co-axial output bars. After the projectile impact on the input bar, the internal output bar measures the axial loading of the cross sample whereas the external output bar measures its transversal loading via a mechanism with sliding surfaces. Gauges glued on the bars enable stain measurements which lead to the forces and to the displacements on the interfaces between the bars and the mounting. The displacement field of the sample is obtained by high-speed imaging and by digital image correlation. Experiments show that the set-up works despites two disadvantages. Firstly, the transversal force in the sample is over-estimated because of the friction in the mechanism. Moreover, comparisons between the displacements on the bars interfaces and the sample displacement field display that the clearance have an influence on the sample loading.
Keywords: Hopkinson bars; biaxial compression test; high-speed imaging Hopkinson bars; biaxial compression test; high-speed imaging
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Durand, B.; Zouari, A.; Zhao, H. Biaxial Compression Tests on Hopkinson Bars. Proceedings 2018, 2, 420.

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