【英文标准名称】:Informationtechnology-Securitytechniques-Encryptionalgorithms-Part3:Blockciphers-CORRIGENDUM3
【原文标准名称】:信息技术.安全技术.加密算法.第3部分:分组密码.技术勘误表3
【标准号】:ANSI/INCITS/ISO/IEC18033-3Corrigendum3-2009
【标准状态】:作废
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:算法;密码;编码;数据处理;数据安全;加密;信息处理;信息技术;性能;安全;应用
【英文主题词】:Algorithms;Ciphers;Coding;Dataprocessing;Datasecurity;Encryption;Informationprocessing;Informationtechnology;Properties;Safety;Use
【摘要】:
【中国标准分类号】:L80
【国际标准分类号】:35_040
【页数】:
【正文语种】:英语


【英文标准名称】:StandardTestMethodsforConstituentContentofCompositeMaterials
【原文标准名称】:用基质溶解法测定树脂基质混合物中纤维含量的标准试验方法
【标准号】:ASTMD3171-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D30.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:航空航天运输;航空运输;复合材料;含量测定;纤维;叠层板材;材料;模型;树脂;航天技术;试验
【英文主题词】:compositematerials;fibercontent;matrixcontent;reinforcementcontent;resincontent;voidvolume
【摘要】:Aconstituentcontentofacompositematerialmustbeknowninordertoanalyticallymodelthematerialproperties(mechanical,physical,thermal,orelectrical)ofthecompositewhichareaffectedbythereinforcementormatrix.Also,knowledgeoftheconstituentcontentisrequiredforevaluationofthequalityofafabricatedmaterialandtheprocessesusedduringfabrication.Thevoidvolumeofacompositematerialmaysignificantlyaffectsomeofitsmechanicalproperties.Highervoidvolumesusuallymeanlowerfatigueresistance,greatersusceptibilitytomoisturepenetrationandweathering,andincreasedvariationorscatterinstrengthproperties.Knowledgeofthevoidvolumeofacompositematerialisdesirableasanindicationofthequalityofacomposite.Reinforcementcontentmaybeusedtonormalizemechanicalpropertiesaffectedbyamountofreinforcementinthecoupon.DESIG:D317106^TITLE:StandardTestMethodsforConstituentContentofCompositeMaterials^SCOPE:1.Scope1.1Thesetestmethodsdeterminetheconstituentcontentofcompositematerialsbyoneoftwoapproaches.MethodIphysicallyremovesthematrixbydigestionorignitionbyoneofsevenprocedures,leavingthereinforcementessentiallyunaffectedandthusallowingcalculationofreinforcementormatrixcontent(byweightorvolume)aswellaspercentvoidvolume.MethodII,applicableonlytolaminatematerialsofknownfiberarealweight,calculatesreinforcementormatrixcontent(byweightorvolume),andthecuredplythickness,basedonthemeasuredthicknessofthelaminate.MethodIIisnotapplicabletothemeasurementofvoidvolume.1.1.1Thesetestmethodsareprimarilyintendedfortwo-partcompositematerialsystems.However,specialprovisionscanbemadetoextendthesetestmethodstofilledmaterialsystemswithmorethantwoconstituents,thoughnotalltestresultscanbedeterminedineverycase.1.1.2Theprocedurescontainedwithinhavebeendesignedtobeparticularlyeffectiveforcertainclassesofpolymerormetalmatrices.ThesuggestedapplicationsarediscussedinSection,aswellasatthestartofeachprocedure.1.1.3MethodIassumesthatthereinforcementisessentiallyunaffectedbythedigestionorignitionmedium.Aprocedureforcorrectionoftheresultsforminorchangesinthereinforcementisincluded.ProceduresAthroughFarebasedonchemicalremovalofthematrixwhileProcedureGremovesthematrixbyignitingthematrixinafurnace.1.1.4MethodIIassumesthatthefiberarealweightofthereinforcementmaterialformisknownorcontrolledtoanacceptabletolerance.Thepresenceofvoidsisnotmeasured.Eqn.1assumezerovoidcontenttoperformthecalculation.1.2TheSIunitsshownareconsideredstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SeeSectionforadditionalinformation.
【中国标准分类号】:G31
【国际标准分类号】:83_140_20
【页数】:10P.;A4
【正文语种】: