Volume 22 Issue 2
Apr 2015
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CHEN Rong, LU Fang-Yun, LIN Yu-Liang, QIN Jin-Gui. Investigation of the Pre-fixed Gap in Single-Pulse Loading Technique of Hopkinson Pressure Bars[J]. Chinese Journal of High Pressure Physics, 2008, 22(2): 187-191 . doi: 10.11858/gywlxb.2008.02.012
Citation: CHEN Rong, LU Fang-Yun, LIN Yu-Liang, QIN Jin-Gui. Investigation of the Pre-fixed Gap in Single-Pulse Loading Technique of Hopkinson Pressure Bars[J]. Chinese Journal of High Pressure Physics, 2008, 22(2): 187-191 . doi: 10.11858/gywlxb.2008.02.012

Investigation of the Pre-fixed Gap in Single-Pulse Loading Technique of Hopkinson Pressure Bars

doi: 10.11858/gywlxb.2008.02.012
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  • Corresponding author: LU Fang-Yun
  • Received Date: 20 Jul 2007
  • Rev Recd Date: 30 Oct 2007
  • Publish Date: 05 Jun 2008
  • In conventional Split Hopkinson Pressure Bars (SHPB) experiments, the tension pulse reflected from the sample back into the incident bar will travel to the free end of the bar and then will reflect back to the sample as compression wave. As a result, the sample is loaded many times. The single-pulse loading technique of the Hopkinson pressure bars can solve the problem. This paper presents the basic principle of the single-pulse loading technique of Hopkinson pressure bars. The way to calculate the pre-fixed gap between the transfer flange and reaction mass is given. The experimental results with various pre-fixed gap are obtained. A device of the single-pulse loading technique is set up. High speed photography is applied to confirm the validation of the technique. Both the photoes and the experimental strain waves show that sample was loaded only once.

     

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