Abstract
Initial results from a Kolsky bar with a 127 μm diameter are presented. The small diameter is used achieve high strain-rates and for compatibility with small (tens of microns) specimens. The bar is instrumented optically; a transverse displacement interferometer is used to measure the input and reflected pulses within the input bar and a normal displacement interferometer is used to measure the transmitted pulse in the output bar. It is shown using a simple elastic impact experiment that the pulses within the bars propagate as uniaxial stress waves according the elementary theory used in the standard analysis. An example application is also given where a niobium sample is loaded at a strain rate greater than 1 M/s.
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Acknowledgement
The authors would like to thank Stephanie Slaughter (Army College Qualified Leaders program) for her help in preparing the niobium specimens.
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© 2016 The Society for Experimental Mechanics, Inc.
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Casem, D., Huskins, E., Ligda, J., Schuster, B. (2016). A Kolsky Bar for High-Rate Micro-compression: Preliminary Results. In: Song, B., Lamberson, L., Casem, D., Kimberley, J. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-22452-7_14
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DOI: https://doi.org/10.1007/978-3-319-22452-7_14
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-22451-0
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