Abstract
Background
Multiaxial dynamic loadings occur in many industrial cases and multiaxial dynamic test development is thus a crucial issue.
Objective
To meet this challenge, a biaxial compression Hopkinson bar set-up is designed.
Methods
The set-up consists of a striker, an input bar, an internal output bar and a co-axial external output tube (surrounding the internal bar). The internal output bar measures the axial loading of the cross sample whereas the external output bar measures the transverse one via a mechanism. This mechanism uses two intermediate parts with inclined sliding surfaces.
Results
Gauges on the bars enable for force measurements in the set-up, and the sample displacement field is obtained by digital image correlation. Simple compression tests on cuboid samples inserted between the input bar and the internal output bar give the sample material behavior. Then, to determine the friction at the mechanism sliding surfaces, identical samples are inserted between the input bar and the external output bar, and are compressed.
Conclusions
Finally, the consistency of the measurements obtained during a biaxial compression test on a cross sample can be checked from the previously measured parameters and from numerical simulations.
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The authors thank their colleague F. Hild for his advice, which helped to improve the article.
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Durand, B., Quillery, P., Zouari, A. et al. Exploratory Tests on a Biaxial Compression Hopkinson Bar Set-up. Exp Mech 61, 419–429 (2021). https://doi.org/10.1007/s11340-020-00665-7
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DOI: https://doi.org/10.1007/s11340-020-00665-7