Volume 33 Issue 6
Apr.  2014
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PingQi, MaQin-yong, YuanPu. StressequilibriuminrockspecimenduringtheloadingprocessofSHPBexperiment[J]. Explosion And Shock Waves, 2013, 33(6): 655-661. doi: 10.11883/1001-1455(2013)06-0655-07
Citation: PingQi, MaQin-yong, YuanPu. Stressequilibriuminrockspecimenduring theloadingprocessofSHPBexperiment[J]. Explosion And Shock Waves, 2013, 33(6): 655-661. doi: 10.11883/1001-1455(2013)06-0655-07

Stressequilibriuminrockspecimenduring theloadingprocessofSHPBexperiment

doi: 10.11883/1001-1455(2013)06-0655-07
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  • Corresponding author: MaQin-yong
  • Publish Date: 2013-11-25
  • Basedontheone-dimensionalstresswavetheory,theelasticstresswavepropagationinthe splitHopkinsonpressurebar(SHPB)experimentwasanalyzedandthecalculationformulaforthe stressdistributioninthespecimenandthepressurebarwasobtained.Andsomefactorsinfluencing thetimeforthestressequilibriumwerediscussed.Theresultsshowthatthetimeforthestressequilibriumismarkedlyaffectedbythenominalspecimen- to-barimpedanceratioandtheincidentwaverisingtimeandhasnorelevancewiththespecimen- to-barsectionarearatioandtheincidentwavestress amplitude.BycombiningwiththeSHPBexperiment,thestrainchangecharacteristicsoftherock specimensachievingstressequilibrium wereinvestigatedfordifferentincidentstressamplitudesand variousincidentrisingtimes.Andsomemethodsforreducingstrainwereputforwardtomakesure thespecimenachievestressequilibriumbeforefracturetoensurethetestsvalid.TheconclusionsobtainedcanprovidesomereferencesforthedesignoftheSHPBexperimentsonbrittlematerialslike rock.
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