【英文标准名称】:StandardTestMethodforModeIFatigueDelaminationGrowthOnsetofUnidirectionalFiber-ReinforcedPolymerMatrixComposites
【原文标准名称】:单向纤维增强聚合基质复合物的模式1疲劳分层增长开始的标准试验方法
【标准号】:ASTMD6115-1997(2004)
【标准状态】:现行
【国别】:
【发布日期】:1997
【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】:D30.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:compositematerials;delamination;doublecantileverbeam;frequency;maximumcyclicstainenergyreleaserate;modeI;onsetoffatiguedelaminationgrowth
【摘要】:Susceptibilitytodelaminationisoneofthemajorweaknessesofmanyadvancedlaminatedcompositestructures.Knowledgeofalaminatedcompositematerialrsquo;resistancetointerlaminarfractureunderfatigueloadsisusefulforproductdevelopmentandmaterialselection.Furthermore,ameasurementoftherelationshipofthemodeIcyclicstrainenergyreleaserateandthenumberofcyclestodelaminationgrowthonset,Gx2013;N,thatisindependentofspecimengeometryormethodofloadintroduction,isusefulforestablishingdesignallowablesusedindamagetoleranceanalysesofcompositestructuresmadefromthesematerials.Thistestmethodcanservethefollowingpurposes:5.2.1Toestablishquantitativelytheeffectsoffibersurfacetreatment,localvariationsinfibervolumefraction,andprocessingandenvironmentalvariablesonGx2013;Nofaparticularcompositematerial.5.2.2TocomparequantitativelytherelativevaluesofGx2013;Nforcompositematerialswithdifferentconstituents.5.2.3Todevelopcriteriaforavoidingtheonsetofdelaminationgrowthunderfatigueloadingforcompositedamagetoleranceanddurabilityanalyses.1.1Thistestmethoddeterminesthenumberofcycles(N)fortheonsetofdelaminationgrowthbasedontheopeningmodeIcyclicstrainenergyreleaserate(G),usingtheDoubleCantileverBeam(DCB)specimenshownin.Thistestmethodappliestoconstantamplitude,tension-tensionfatigueloadingofcontinuousfiber-reinforcedcompositematerials.WhenthistestmethodisappliedtomultiplespecimensatvariousG-levels,theresultsmaybeshownasaG-Ncurve,asillustratedinFig2.1.2Thistestmethodislimitedtousewithcompositesconsistingofunidirectionalcarbonfibertapelaminateswithsingle-phasepolymermatrices.Thislimitedscopereflectstheexperiencegainedinroundrobintesting.Thistestmethodmayproveusefulforothertypesandclassesofcompositematerials,however,certaininterferenceshavebeennoted(seeSection6.5ofTestMethodD5528).1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesprovidedinparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:83_120
【页数】:6P.;A4
【正文语种】: