Abstract
A new apparatus – “Dropkinson Bar” – has been successfully developed for material property characterization at intermediate strain rates. This Dropkinson bar combines a drop table and a Hopkinson bar. The drop table was used to generate a relatively long and stable low-speed impact to the specimen, whereas the Hopkinson bar principle was applied to measure the load history with accounting for inertia effect in the system. Pulse shaping technique was also applied to the Dropkinson bar to facilitate uniform stress and strain as well as constant strain rate in the specimen. The Dropkinson bar was then used to characterize 304L stainless steel and 6061-T6 aluminum at a strain rate of ∼600 s−1. The experimental data obtained from the Dropkinson bar tests were compared with the data obtained from conventional Kolsky tensile bar tests of the same material at similar strain rates. Both sets of experimental results were consistent, showing the newly developed Dropkinson bar apparatus is reliable and repeatable.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Lim, S.J., Huh, H.: Fracture loci of DP980 steel sheet for auto-body at intermediate strain rates. Int. J. Automot. Technol. 18, 719–727 (2017)
Jing, J., Gao, F., Johnson, J., Liang, F.Z., Williams, R.L., Qu, J.: Brittle versus ductile failure of a lead-free single solder joint specimen under intermediate strain rate. IEEE Trans. Compon. Packag. Manuf. Technol. 1, 1456–1464 (2011)
Gilat, A., Matrka, T.A.: A new compression intermediate strain rate testing apparatus. EPJ Web Conf. 6, 39002 (2010)
Luo, H., Cooper, W.L., Lu, H.: Effects of particle size and moisture on the compressive behavior of dense Eglin sand under confinement at high strain rates. Int. J. Impact Eng. 65, 40–55 (2014)
Song, B., Syn, C.J., Grupido, C.L., Chen, W., Lu, W.-Y.: A long split Hopkinson pressure (LSHPB) for intermediate-rate characterization of soft materials. Exp. Mech. 48, 809–815 (2008)
LeBlanc, M.M., Lassila, D.H.: A hybrid technique for compression testing at intermediate strain rates. Exp. Mech. 20, 21–24 (1996)
Petiteau, J.-C., Othman, R., Guégan, P., Le Sourne, H., Verron, E.: A drop-bar setup for the compressive testing of rubber-like materials in the intermediate strain rate range. Strain. 50, 552–562 (2014)
Nie, X., Song, B., Loeffler, C.M.: A novel splitting-beam laser extensometer technique for Kolsky tension bar experiment. J. Dyn. Behav. Mater. 1, 70–74 (2015)
Acknowledgement
Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. The views expressed in this article do not necessarily represent the views of the U.S. Department of Energy or the United States Government.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 The Society for Experimental Mechanics, Inc.
About this paper
Cite this paper
Song, B. et al. (2019). Development of “Dropkinson” Bar for Intermediate Strain-Rate Testing. In: Kimberley, J., Lamberson, L., Mates, S. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-95089-1_12
Download citation
DOI: https://doi.org/10.1007/978-3-319-95089-1_12
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-95088-4
Online ISBN: 978-3-319-95089-1
eBook Packages: EngineeringEngineering (R0)