Applicationsofalaserdisplacementgauge

inHopkinsonbarexperiments

CHEN Rong; LU Fang-yun; LIN Yu-liang; XIA Kai-wen

doi:10.11883/1001-1455(2011)01-0036-07

Volume 31 Issue 1

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CHEN Rong, LU Fang-yun, LIN Yu-liang, XIA Kai-wen. ApplicationsofalaserdisplacementgaugeinHopkinsonbarexperiments[J]. Explosion And Shock Waves, 2011, 31(1): 36-42. doi: 10.11883/1001-1455(2011)01-0036-07

Citation:

CHEN Rong, LU Fang-yun, LIN Yu-liang, XIA Kai-wen. Applicationsofalaserdisplacementgauge inHopkinsonbarexperiments[J]. Explosion And Shock Waves, 2011, 31(1): 36-42. doi: 10.11883/1001-1455(2011)01-0036-07

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Applicationsofalaserdisplacementgauge inHopkinsonbarexperiments

doi: 10.11883/1001-1455(2011)01-0036-07

1.
CollegeofScience,NationalUniversityofDefenseTechnology,
2.
Changsha410073,Hunan,China;

Funds:

NationalNaturalScienceFoundationofChina(10672177,10872215)

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Corresponding author: CHEN Rong
Publish Date: 2011-01-25

Abstract

Abstract

Alaserdisplacementgauge(LDG)systemisproposed.Boththestaticanddynamiccalibrationsarecarriedout, andtheresultsshowthatthesystemiseffectivefordynamictest.Asanefficientmeasuringmethod, theLDGcanbeappliedintheHopkinsonbarexperiment,suchas:(1)the LDGcanbeusedtomonitortheradialdisplacementofthespecimen,withwhichthedynamicPoissonsRatiocanbecalculated;( 2)theLDGcanbeadoptedtomeasurethecracksurfaceopeningdisplacementofthenotchinadynamicfracturetest, andthenthedynamicfractureenergycanbeobtainedbyassociatingthesignalsfromthestraingaugesmountedonthebars;( 3)aninnovativeHopkinsonbarsystemfortestingultra- softmaterialsunderintermediatestrainratesisdeveloped,where theLDGisemployedtomonitorthedeformationofthesampledirectly,andtwopiezoelectricforce transducersaresandwichedbetweenthespecimenandtwobarsrespectivelytomeasuretheweakdynamicloadsdirectly.
- solidmechanics,
- dynamicfractureenergy,
- laserdisplacementgauge,
- ultra-softmaterial,
- dynamicPoissonsratio