Stressequilibriuminrockspecimenduring

theloadingprocessofSHPBexperiment

PingQi; MaQin-yong; YuanPu

doi:10.11883/1001-1455(2013)06-0655-07

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

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

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Stressequilibriuminrockspecimenduring theloadingprocessofSHPBexperiment

doi: 10.11883/1001-1455(2013)06-0655-07

1.
MinistryofEducation’sEngineeringResearchCenterof MineUndergroundProjects,
2.
AnhuiUniversityofScienceandTechnology,Huainan,Anhui232001,China;

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Corresponding author: MaQin-yong
Publish Date: 2013-11-25

Abstract

Abstract

Basedontheone-dimensionalstresswavetheory,theelasticstresswavepropagationinthe splitHopkinsonpressurebar(SHPB)experimentwasanalyzedandthecalculationformulaforthe stressdistributioninthespecimenandthepressurebarwasobtained.Andsomefactorsinfluencing thetimeforthestressequilibriumwerediscussed.Theresultsshowthatthetimeforthestressequilibriumismarkedlyaffectedbythenominalspecimen- to-barimpedanceratioandtheincidentwaverisingtimeandhasnorelevancewiththespecimen- to-barsectionarearatioandtheincidentwavestress amplitude.BycombiningwiththeSHPBexperiment,thestrainchangecharacteristicsoftherock specimensachievingstressequilibrium wereinvestigatedfordifferentincidentstressamplitudesand variousincidentrisingtimes.Andsomemethodsforreducingstrainwereputforwardtomakesure thespecimenachievestressequilibriumbeforefracturetoensurethetestsvalid.TheconclusionsobtainedcanprovidesomereferencesforthedesignoftheSHPBexperimentsonbrittlematerialslike rock.
- solidmechanics,
- stressequilibrium