25 August 2009 Combined compression-shear loading at high strain rates: the split Hopkinson pressure shear bar
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Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 737563 (2009) https://doi.org/10.1117/12.839366
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China
Abstract
The present paper proposes an experimental technique, the split Hopkinson pressure shear bar (SHPSB) which load materials with combined compression-shear. SHPSB is mainly composed of a projectile, an incident bar and two transmitter bars. The close-to-specimen end of incident is wedge-shaped with 90 degree. In each experiment, there were two identical specimens respectively agglutinated between one side of the wedge and one of transmitter bars. The sensors were three strain gages located on the bars and two piezoelectric crystals of LiNbO3 embedded at the end (near specimen) of transmitter bars. The numerical results validated the technique. A kind of explosive, JHL-3 was investigated by SHPSB. We find that JHL-3 is sensitive to strain rates and the shear strength is 0.75MPa at shear strainrate of 350s-1, and corresponding compression strength is 9MPa; the shear strength is about 1.8Mpa at shear strain-rate of 700s-1, and corresponding compression strength is about 25MPa.
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Peng-duo Zhao, Fang-yun Lu, Yu-liang Lin, Rong Chen, Jun-ling Li, Gui-lin Sun, "Combined compression-shear loading at high strain rates: the split Hopkinson pressure shear bar", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 737563 (25 August 2009); doi: 10.1117/12.839366; https://doi.org/10.1117/12.839366
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