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ASTM E2331-2004 已修改文献检查用标准指南

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【英文标准名称】:StandardGuideforExaminationofAlteredDocuments
【原文标准名称】:已修改文献检查用标准指南
【标准号】:ASTME2331-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E30.02
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:alterations;erasures;forensicsciences;insertions;obliterations;overwriting;questioneddocuments
【摘要】:Theproceduresoutlinedherearegroundedinthegenerallyacceptedbodyofknowledgeandexperienceinthefieldofforensicdocumentexamination.Byfollowingtheseprocedures,aforensicdocumentexaminercanreliablyreachanopinionconcerningwhetheradocumenthasbeenaltered.1.1ThisGuideprovidesproceduresforexaminationsthatshouldbeusedbyforensicdocumentexaminers(E444)forexaminationsinvolvingaltereddocuments.1.2Theseproceduresareapplicablewhethertheexamination(s)areofquestionedandknownitems,exclusivelyquestioneditems,orasingleitem.1.3Theseproceduresincludeevaluationofthesufficiencyofthematerialavailableforexamination.1.4Theparticularmethodsemployedinagivencasewilldependuponthenatureofthematerialavailableforexamination.1.5ThisGuidemaynotcoverallaspectsofunusualoruncommonexaminations.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatoryrequirementspriortouse.
【中国标准分类号】:A14
【国际标准分类号】:01_140_20
【页数】:3P.;A4
【正文语种】:


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【英文标准名称】:StandardTestMethodforTranslaminarFractureToughnessofLaminatedandPultrudedPolymerMatrixCompositeMaterials
【原文标准名称】:叠层和挤拉制聚合物基质合成材料横断面断裂韧性的标准试验方法
【标准号】:ASTME1922-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E08.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:韧性;分层的;断裂韧性;聚合材料;高聚物;试验方法
【英文主题词】:translaminarfracturtoughness;laminatedpolymer;pultrudedpolymer;matrixcomposite
【摘要】:TheparameterKTLdeterminedbythistestmethodisameasureoftheresistanceofapolymermatrixcompositelaminatetonotch-tipdamageandeffectivetranslaminarcrackgrowthunderopeningmodeloading.Theresultisvalidonlyforconditionsinwhichthedamagezoneatthenotchtipissmallcomparedwiththenotchlengthandthein-planespecimendimensions.Thistestmethodcanservethefollowingpurposes.Inresearchanddevelopment,KTLdatacanquantitativelyestablishtheeffectsoffiberandmatrixvariablesandstackingsequenceofthelaminateonthetranslaminarfractureresistanceofcompositelaminates.Inacceptanceandqualitycontrolspecifications,KTLdatacanbeusedtoestablishcriteriaformaterialprocessingandcomponentinspection.Thetranslaminarfracturetoughness,KTL,determinedbythistestmethodmaybeafunctionofthetestingspeedandtemperature.Thistestmethodisintendedforroomtemperatureandquasi-staticconditions,butitcanapplytoothertestconditionsprovidedthattherequirementsof9.2and9.3aremet.ApplicationofKTLinthedesignofservicecomponentsshouldbemadewithawarenessthatthetestparametersspecifiedbythistestmaydifferfromserviceconditions,possiblyresultinginadifferentmaterialresponsethanthatseeninservice.Notalltypesoflaminatedpolymermatrixcompositematerialsexperiencethecontainednotch-tipdamageandeffectivetranslaminarcrackgrowthofconcerninthistestmethod.Forexample,thenotch-tipdamagemaybemoreextensiveandmaynotbeaccompaniedbyanysignificantamountofeffectivetranslaminarcrackgrowth.Typically,lowerstrengthcompositematerialsandthosewithasignificantproportionofreinforcingfibersalignedinadirectionperpendiculartothenotchaxismaynotexperiencethecontainednotch-tipdamagerequiredforavalidtest.1.1Thistestmethodcoversthedeterminationoftranslaminarfracturetoughness,KTL,forlaminatedandpultrudedpolymermatrixcompositematerialsofvariousplyorientationsusingtestresultsfrommonotonicallyloadednotchedspecimens.1.2Thistestmethodisapplicabletoroomtemperaturelaboratoryairenvironments.1.3Compositematerialsthatcanbetestedbythistestmethodarenotlimitedbythicknessorbytypeofpolymermatrixorfiber,providedthatthespecimensizesandthetestresultsmeettherequirementsofthistestmethod.Thistestmethodwasdevelopedprimarilyfromtestresultsofvariouscarbonfiber-epoxymatrixlaminatesandfromadditionalresultsofglassfiber-epoxymatrix,glassfiber-polyestermatrixpultrusionsandcarbonfiber-bismaleimidematrixlaminates(1-4,6,7).1.4Arangeofeccentricallyloaded,single-edge-notchtension,ESE(T),specimensizeswithproportionalplanardimensionsisprovided,butplanarsizemaybevariableandadjusted,withassociatedchangesintheappliedtestload.Specimenthicknessisavariable,independentofplanarsize.1.5Specimenconfigurationsotherthanthosecontainedinthistestmethodmaybeused,providedthatstressintensitycalibrationsareavailableandthatthetestresultsmeettherequirementsofthistestmethod.Itisparticularlyimportantthattherequirementsdiscussedin5.1and5.4regardingcontainednotch-tipdamagebemetwhenusingalternativespecimenconfigurations.1.6ValuesstatedinSIunitsaretoberegardedasthestandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityo......
【中国标准分类号】:G31
【国际标准分类号】:83_140_20
【页数】:5P.;A4
【正文语种】: