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Chinese Journal of High Pressure Physics  > 2010  >  24(5): 359-367 .
PANG Bao-Jun, YANG Zhen-Qi, WANG Li-Wen, CHI Run-Qiang. PVDF Stress Gauges Dynamic Stress Measurement and Its Application to SHPB Experiment for Rubber Materials[J]. Chinese Journal of High Pressure Physics, 2010, 24(5): 359-367 . doi: 10.11858/gywlxb.2010.05.007
Citation: PANG Bao-Jun, YANG Zhen-Qi, WANG Li-Wen, CHI Run-Qiang. PVDF Stress Gauges Dynamic Stress Measurement and Its Application to SHPB Experiment for Rubber Materials[J]. Chinese Journal of High Pressure Physics, 2010, 24(5): 359-367 . doi: 10.11858/gywlxb.2010.05.007
shu

PVDF Stress Gauges Dynamic Stress Measurement and Its Application to SHPB Experiment for Rubber Materials

doi: 10.11858/gywlxb.2010.05.007

  • School of Astronautics, Harbin Institute of Technology, Harbin 150080, China

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  • Corresponding author: YANG Zhen-Qi
  • Received Date: 23 Sep 2009
  • Rev Recd Date: 04 Dec 2009
  • Publish Date: 15 Oct 2010
    Abstract
  • Dynamic calibration experiments of sandwich PVDF (Polyvinylide Fluoride) stress gauges have been investigated by split Hopkinson pressure bar (SHPB). Dynamic piezoelectricity of PVDF gauges has been discussed, including testing circuit, stress concentration effect of PVDF gauge surface, inherent characteristic and package of PVDF stress gauges and multi-impact effects on the testing signals. The stress uniformity state of rubber materials has been investigated by PVDF gauges. The results show that adjusting the testing resistance can improve the accuracy; increasing the PVDF gauge sensitive area can avoid the signal distortion caused by stress concentration; thermal-plastic characteristic and gauge package can cause the PVDF stress plate to vibrate less than real signal; multi-impact has influence on both the signal loading and unloading part, but when the gauge is un-damaged, the signal flat potion is similar to the real signal.

     

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