Determination of dynamic tensile response of materials has been a challenge because of experimental difficulty. The split Hopkinson tensile bar (SHTB) is one of the most widely used devices for characterization of various materials under dynamic-tensile loading conditions. Since one-dimensional wave propagation in bars is disturbed by specimens and grips, however, SHTB measurement accuracy may not be guaranteed. This means that the stress–strain curve of the specimen that is calculated using strains at bars may not indicate the real stress–strain relation of the specimen. In this study, simulations for the SHTB test were carried out to investigate the effects of thread pitch, specimen length, specimen diameter, and thread inner diameter of the specimen on the measurement accuracy for two types of metals with medium and high yield strengths. Finally, specimen shapes are recommended for accurate measurement of the stress–strain relation of tantalum and tungsten carbide.
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Kolsky, H. (1949). An investigation of the mechanical properties of materials at very high rates of loading. Proceedings of the Physical Society B,62(11), 676–700.
Duffy, J., Campbell, J. D., & Hawley, R. H. (1971). On the use of a torsional split Hopkinson bar to study rate effects in 1100–0 Aluminum. Journal of Applied Mechanics,38(1), 83–91.
Gilat, A., & Cheng, C. S. (2000). Torsional split Hopkinson bar tests at strain rates above 104s–1. Experimental Mechanics,40(1), 54–59.
Harding, J., Wood, E. O., & Campbell, J. D. (1960). Tensile testing of materials at impact rates of strain. Journal Mechanical Engineering Science,2(2), 88–96.
Hauser, F. (1966). Techniques for measuring stress-strain relations at high strain rates. Experimental Mechanics,6(8), 395–402.
Ogawa, K. (1984). Impact-tension compression test by using a split-Hopkinson bar. Experimental Mechanics,24(2), 81–86.
Lei, N., & Xu, D. (2017). Deformation temperature and material constitutive model of cupronickel B10. Journal of Mechanical Science and Technology,31(8), 3761–3767.
Johnson, G. R., Cook, W. H. (1983). A constitutive model and data for metals subjected to large strains, high strain rates, and high temperatures. In Proceedings of the 7th international symposium on ballistics, The Hague, Netherlands, 19–21 April, pp. 541–547.
Shin, H., & Kim, J.-B. (2016). Understanding the anomalously long duration time of the transmitted pulse from a soft specimen in a kolsky bar experiment. International Journal of Precision Engineering and Manufacturing,17(2), 203–208.
Chunzheng, D., Fangyuan, Z., Siwei, Q., Wei, S., & Minjie, W. (2018). Modeling of dynamic recrystallization in white layer in dry hard cutting by finite element-cellular automaton method. Journal of Mechanical Science and Technology,32(9), 4299–4312.
Kim, J. T., Sakong, J., Woo, S.-C., Kim, J.-Y., & Kim, T.-W. (2018). Determination of the damage mechanisms in armor structural materials via self-organizing map analysis. Journal of Mechanical Science and Technology,32(1), 129–138.
Lindholm, U. S., & Yeakley, L. M. (1968). High strain-rate testing: Tension and compression. Experimental Mechanics,8(1), 1–9.
Staab, G. H., & Gillet, A. (1991). A direct-tension split Hopkinson bar for high strain-rate testing. Experimental Mechanics,31(3), 232–235.
Bang, H., & Cho, C. (2017). Failure behavior/characteristics of fabric reinforced polymer matrix composite and aluminum6061 on dynamic tensile loading. Journal of Mechanical Science and Technology,31(8), 3661–3664.
Huh, H., Kang, W. J., & Han, S. S. (2002). A tension split Hopkinson bar for investigating the dynamic behavior of sheet metal. Experimental Mechanics,42(1), 8–17.
Nicholas, T. (1981). Tensile testing of materials at high rates of strain. Experimental Mechanics,21(5), 177–185.
Pham, T. N., Choi, H. S., & Kim, J.-B. (2013). A numerical investigation into the tensile split Hopkinson pressure bars test for sheet metals. Applied Mechanics and Materials,421, 464–467.
Nguyen, K. H., Kim, H. C., Shin, H., Yoo, Y.-H., & Kim, J.-B. (2017). Numerical investigation into the stress wave transmitting characteristics of threads in the split Hopkinson tensile bar test. International Journal of Impact Engineering,109, 253–263.
Prabowo, D. A., Kariem, M. A., & Gunawan, L. (2017). The effect of specimen dimension on the results of the Split-Hopkinson tension bar testing. Procedia Engineering,173, 608–614.
Nguyen, K. H. (2018). Numerical investigation into the stress wave transmitting characteristics of threads and specimen design in the split Hopkinson tensile bar test, Ph. D. thesis, Seoul National University of Science and Technology.
Owolabi, G., Odoh, D., Odeshi, A., & Whitworth, H. (2013). Occurrence of dynamic shear bands in AISI 4340 steel under impact loads. World Journal of Mechanics,3, 139–145.
Yoo, Y.-H., Paik, S. H., Kim, J.-B., & Shin, H. (2013). Performance of a flying cross bar to incapacitate a long-rod penetrator based on a finite element model. Engineering with Computers,29(4), 409–415.
Kim, J.-B., & Shin, H. (2009). Comparison of plasticity models for tantalum and a modification of the PTW model for wide ranges of strain, strain rate, and temperature. International Journal of Impact Engineering,36(5), 746–753.
Cha, S.-H., Shin, H., & Kim, J.-B. (2010). Numerical Investigation of Frictional Effects and Compensation of Frictional Effects in Split Hopkinson Pressure Bar (SHPB) Test. Transactions of the Korean Society of Mechanical Engineers, A,34(5), 511–518.
Maudlin, P. J., Bingert, J. F., House, J. W., & Chen, S. R. (1999). On the modeling of the Taylor cylinder impact test for orthotropic textured materials: experiments and simulations. International Journal Plasticity,15(2), 139–166.
Nemat-Nasser, S., & Isaacs, J. (1997). Direct measurement of isothermal flow stress of metals at elevated temperatures and high strain rates with application to Ta and Ta–W alloys. Acta Materialia,45(3), 907–919.
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (Ministry of Education) (No. NRF-2016R1D1A1B01014711) and by the research fund of the Survivability Technology Defense Research Center of the Agency for Defense Development of Korea (No. UE161102GD).
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Nguyen, K., Lee, C., Shin, H. et al. A Study on the Effects of Specimen Geometry on Measurement Accuracy of Dynamic Constitutive Properties of Metals Using SHTB. Int. J. Precis. Eng. Manuf. (2020). https://doi.org/10.1007/s12541-020-00368-y
- Split hopkinson tensile bar
- High strain rate
- Tungsten carbide