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【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】:


【英文标准名称】:Aluminiumandaluminiumalloys-Colddrawnrod/barandtube-Part4:squarebars,tolerancesondimensionsandform.
【原文标准名称】:铝和铝合金.冷拉杆材/棒材和管材.第4部分:方形棒材的尺寸和形状公差
【标准号】:NFA50-610-4-2008
【标准状态】:现行
【国别】:法国
【发布日期】:2008-06-01
【实施或试行日期】:2008-06-28
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:铝;铝合金;铝管;棒材;冷拔(拉);尺寸公差;尺寸;拉拔;形状公差;极限偏差;可锻材料;有色金属合金;有色金属;杆材;半成品;方形棒材;测试;公差(测量);可锻合金
【英文主题词】:Aluminium;Aluminiumalloys;Aluminiumpipes;Bars(materials);Cold-drawn;Dimensionaltolerances;Dimensions;Drawn;Formtolerances;Limitdeviations;Malleablematerials;Non-ferrousalloys;Non-ferrousmetals;Poles;Semi-finishedproducts;Squarebars;Testing;Tolerances(measurement);Wroughtalloys
【摘要】:
【中国标准分类号】:H61
【国际标准分类号】:77_150_10
【页数】:11P;A4
【正文语种】:其他