DIN 53753-1981 热塑性塑料的检验.对有孔洞缺口或双V形缺口样品的冲击抗弯试验

上一篇: DIN 16922-1981 用塑料制成的柔性片材.工艺分类
下一篇: DIN 53132-1981 纸和纸板的检验.按Cobb法测定吸水性

【英文标准名称】:StandardTestMethodsforMeasurementofThicknessofSandwichCores
【原文标准名称】:夹层芯材厚度测定的标准试验方法
【标准号】:ASTMC366/C366M-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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;corethickness;sandwich
【摘要】:Normally,aclosetoleranceisdesirableforcorethicknesssothatsandwichpanelsmaybemanufacturedwithallthesandwichcomponentsfittingproperlyandwithoutcrushingthecore.Thesetestmethodsaredesignedformeasuringthicknessofcoreasitisproducedandarenotintendedforuseindeterminingdimensionsofcorespecimensforothertests.Thesetestmethodsprovidestandardmethodsofobtainingthecorethicknessofflatsandwichcorematerials,andprovideabasisfordeterminingaveragethicknessdimensions.Thethicknesspropertiesderivedmaybeusedindesignproperties,materialspecifications,researchanddevelopmentapplications,andqualityassurance.Factorsthatinfluencecorethicknessmeasurementandshallthereforebereportedincludethefollowing:corematerialthrough-thicknessrigidity,surfaceroughness,specimengeometry(includingwarpage),specimenpreparation,methodsofdimensionalmeasurement,specimenconditioning,andmoisturecontentduringdimensionalmeasurements.1.1Thesetestmethodscoverplantmanufacturingproceduresformeasuringthethicknessofflatsandwichcores.Permissiblecorematerialformsincludethosewithcontinuousbondingsurfaces(suchasbalsawoodandfoams)aswellasthosewithdiscontinuousbondingsurfaces(suchashoneycomb).Thetwotestmethodscoveredincludethefollowing:1.1.1TestMethodARoller-TypeThicknessTester.1.1.2TestMethodBDisk-TypeThicknessTester.Note1Thesetestmethodsaredesignedformeasuringthicknessofcoreasitisproducedandarenotintendedforuseindeterminingdimensionsofcorespecimensforothertests.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】:4P.;A4
【正文语种】:


【英文标准名称】:Metallurgical-gradefluorspar;determinationofleadcontent;solventextractionatomicabsorptionspectrometricmethod
【原文标准名称】:冶金性荧石铅含量的测定溶剂萃取原子吸收光谱法
【标准号】:ISO9779-1993
【标准状态】:作废
【国别】:国际
【发布日期】:1993-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC175
【标准类型】:()
【标准水平】:()
【中文主题词】:冶金工业;铅含量;光谱测定法;含量测定;铅;萤石;原子吸收分光光度测定法;化学分析和试验;矿物
【英文主题词】:Atomicabsorptionspectrophotometry;Chemicalanalysisandtesting;Determinationofcontent;Fluorspar;Lead;Leadcontent;Metallurgicalindustry;Minerals;Spectrometry
【摘要】:Theprincipleofthemethodspecifiedistodecomposeatestportionbyamixtureofnitric,hydrofluoricandperchloricacids,dissolvingthesaltsinhydrochloricacidafterevaporationtodryness,extractingtheleadfromadilutehydrochloricacidsolutionofthedecomposedtestportionintoasolutionoftri-n-octylphosphineoxidein4-methyl-2-pentanone,aspiratingtheextractintotheair/acetyleneflameofanatomicabsorptionspectrometer,andmeasuringtheabsorbanceat283,3nm.Appliestoproductshavingleadcontentsintherange0,0006%(m/m)to0,01%(m/m).
【中国标准分类号】:D52
【国际标准分类号】:73_080
【页数】:6P;A4
【正文语种】:英语