2015-2020年中国塑机辅机行业全景调研及市场运营趋势报告

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1、StatisticalTensileStrengthforHighStrainRateofAramidandUHMWPEFibers46材料工程/2006年5期StatisticalTensileStrengthforHighStrainRateofAramidandUHMWPEFibersYANGBin.XIoNGTao,XIONGJie(KeyLaboratoryofAdvancedTextileMaterialsandManufacturingTechnology,MinistryofEducation,ZhejiangSci—TechUniversity,Hangzh

2、ou310018,China)Abstract:Dynamictensileimpactpropertiesofaramid(Technora@)andUHMWPE(DC851)fiberbundleswerestudiedattwohighstrainratesbymeansofreflectingtypeSplitHopkinsonBar,andstress—straincurvesoffiberyarnsatdiffer—entstrainrateswereobtained.Experimentalresultsshowthattheinitialelasticmodu

3、lus,failurestrengthandunstablestrainofaramidfiberyarnsarestrainrateinsensitive,whereastheinitialelasticmodulusandunstablestrainofUHM—WPEfibervamsarestrainratesensitive.Afiber-bundlestatisticalconstitutiveequationwasusedtodescribethetensilebehaviorofaramidandUHMWPEfiberbundlesathighstrainrat

4、es.ThegoodconsistencybetweenthesimulatedresultsandexDerimenta1dataindicatesthatthemodifieddoubleWeibullfunctioncanrepresentthetensilestrengthdistributionofaramidandUHMWPEfibersandthemethodofextractingWeibullparametersfromfiberbundlesstress—straindataisval—id.KeywOrds:aramidfiber;UHMWPEfiber

5、;impactbehaviour;statisticalproperties;statisticalconstitutiVeequationCLCnumber:TB33Documentcode:AArticleID:1001-4381(2006)05—0046—05Technora~,madefromaramidfibersandsome—whatsim订artothecommonlyknowKevlar@,andUltrahighlyorientedhighmolecularweightpolyeth—vlene_UHMWPEfibersarealloftenusedinf

6、lexiblearmourapplicationsandhencesubjectedtohighratesofloading.Theutilizationoftheirreinforcedcom—positesarmourincertainballisticapplicationsisin—creasinglypreferredoverconventionalrigidmetalar—moursystemsbecauseofitssuperiorstrength..to——weightratioandflexibility.Todate,thedesignanddevelop

7、mentofsuchfabricarmoursystemshavelargelybeenapproachedempirically[卜.Theballis—ticresistanceoffiber—reinforcedcompositeisessen—tiallydependentonthemechanicalbehaviorofthere—inforcingcomponentandthematrix.Fibersandfiberbundlescarrythebulkoftheappliedloadin