ASTM C273/C273M-2007a 夹芯材料剪切性质的标准试验方法

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【英文标准名称】:StandardTestMethodforShearPropertiesofSandwichCoreMaterials
【原文标准名称】:夹芯材料剪切性质的标准试验方法
【标准号】:ASTMC273/C273M-2007a
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D30.09
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:core;honeycomb;sandwich;sandwichconstruction;shearmodulus;shearstrength
【摘要】:Thecoreshearpropertiesarefundamentalpropertiesthatareusedinthedesignofsandwichpanels.Thistestmethodprovidesinformationontheforce-deflectionbehaviorofsandwichconstructionsorcoreswhenloadedinshearparalleltotheplaneofthefacings.Fromacompleteforce-deflectioncurve,itispossibletocomputecoreshearstressatanyforce(suchastheshearstressatproportionallimit,atyield,oratmaximumforce)andtocomputeaneffectivecoreshearmodulus.Thetestdoesnotproducepureshear,butthespecimenlengthisprescribedsothatsecondarystresseshaveaminimumeffect.Approximateshearpropertiescanalsobeobtainedfromasandwichflexuretest(seeTestMethodC393).Thistestmethodprovidesastandardmethodofobtainingsandwichcoresheardataformaterialspecifications,sandwichpaneldesign,researchanddevelopmentapplications,andqualityassurance.Factorsthatinfluencecoreshearstrengthandshallthereforebereportedincludethefollowing:facingmaterial,corematerial,adhesivematerial,methodsofmaterialfabrication,coregeometry(density,cellsize,orientation,etc.),adhesivethickness,specimengeometryandassociatedmeasurementaccuracy,specimenpreparation,specimenconditioning,environmentoftesting,specimenalignment,loadingprocedure,speedoftesting,andadhesivevoidcontent.Further,core-to-facingstrengthmaybedifferentbetweenprecured/bondedandco-curedfacingsinsandwichpanelswiththesamecoreandfacingmaterial.1.1Thistestmethodcoversthedeterminationofshearpropertiesofsandwichconstructioncorematerialsassociatedwithsheardistortionofplanesparalleltothefacings.Itcoversthedeterminationofshearstrengthparalleltotheplaneofthesandwich,andtheshearmodulusassociatedwithstrainsinaplanenormaltothefacings.Thetestmaybeconductedoncorematerialsbondeddirectlytotheloadingplatesorthesandwichfacingsbondedtotheplates.Permissiblecorematerialformsincludethosewithcontinuousbondingsurfaces(suchasbalsawoodandfoams)aswellasthosewithdiscontinuousbondingsurfaces(suchashoneycomb).1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetexttheinch-poundunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:83_120
【页数】:7P.;A4
【正文语种】: