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【英文标准名称】:StandardTestMethodforApparentBendingModulusofPlasticsbyMeansofaCantileverBeam
【原文标准名称】:悬臂梁法测定塑料的表观弯曲模量的标准试验方法
【标准号】:ASTMD747-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:apparentbendingmodulus;bendingmovement;cantileverbeam;stiffness;Apparentbendingmodulus;Cantilevertesting;Deformation--plastics;Bendingmoment;Flexibility--plastics;Stiffness--plastics
【摘要】:Thistestmethodprovidesameansofderivingtheapparentbendingmodulusofamaterialbymeasuringforceandangleofbendofacantileverbeam.Themathematicalderivationassumessmalldeflectionsandpurelyelasticbehavior.Underactualtestconditions,thedeformationhasbothelasticandplasticcomponents.Thistestmethoddoesnotdistinguishorseparatethese,andhenceatrueelasticmodulusisnotcalculable.Instead,anapparentvalueisobtainedandisdefinedastheapparentbendingmodulusofthematerial.ThetangentmodulusobtainedbyTestMethodsD790ispreferred,whenthematerialcanbetestedbytheTestMethodsD790testprocedure.Becauseofdeviationsfrompurelyelasticbehavior,changesinspanlength,width,anddepthofthespecimenwillaffectthevalueoftheapparentbendingmodulusobtained;therefore,valuesobtainedfromspecimensofdifferentdimensionsarenotnecessarilycomparable.Rateofloadingiscontrolledonlytotheextentthattherateofangularchangeoftherotatingjawisfixedat58to66x00B0;/min.Actualrateofstressingwillbeaffectedbyspanlength,width,depthofthespecimen,andweightofthependulum.Formanymaterials,therearespecificationsthatrequiretheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1ofClassificationSystemD4000liststheASTMmaterialsstandardsthatcurrentlyexist.Note28212;Adiscussionofthetheoryofobtainingapurelyelasticbendingmodulus,usingacantileverbeamtestingapparatus,canbefoundinAppendixX1.Theresultsobtainedunderactualtestconditionswillbetheapparentbendingmodulus.1.1Thistestmethodcoversthedeterminationoftheapparentbendingmodulusofplasticsbymeansofacantileverbeam.Itiswellsuitedfordeterminingrelativeflexibilityofmaterialsoverawiderange.ItisparticularlyusefulformaterialstooflexibletobetestedbyTestMethodsD790.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThereisnoknownISOequivalenttothisstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:6P.;A4
【正文语种】:英语


【英文标准名称】:Personaleyeprotection-Eyeprotectorsforsnowmobileusers;GermanversionEN13178:2000
【原文标准名称】:人员的眼睛保护.雪地汽车使用者用护目器
【标准号】:EN13178-2000
【标准状态】:现行
【国别】:
【发布日期】:2000-07
【实施或试行日期】:2000-07-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:防护屏;规范(验收);光学;事故预防;面罩;适用性;耐腐蚀性;过滤器;光散射性;护目设备;防护水平;材料质量;辐射;雪地汽车;材料;生产;安全;材料强度;安全装置;特性;作标记;分类;视力范围;名称与符号;耐辐射性;冬季运动;安全工程;防护帽;人员保护设备;检验;设计;护目镜;紫外线辐射;冲击强度;眼镜(夹鼻);防护服装;通气;安全要求;尺寸;眼镜;滤光镜(护目);冬季运动设备;护目眼镜;防事故;目镜;目镜;护目器;试验;制造
【英文主题词】:Accidentprevention;Aeration;Classification;Corrosionresistance;Design;Designations;Dimensions;Eyeprotector;Eyeprotectors;Eye-protectiveequipment;Faceshields;Filters;Filters(eyeprotectors);Fitnessforpurpose;Glasses;Goggles(safety);Helmets;Impactstrength;Inspection;Lightdivergence;Manufacturing;Marking;Materialqualities;Materials;Oculars;Optics;Personnelprotectiveequipment;Production;Properties;Protectionagainstaccidents;Protectionlevel;Protectiveclothing;Radiation;Radiationresistance;Safety;Safetydevices;Safetyengineering;Safetyrequirements;Shielding;Snowmobiles;Specification(approval);Spectacles(eyeglasses);Strengthofmaterials;Testing;Ultravioletradiation;Visor;Visualfield;Wintersports;Wintersportsequipment
【摘要】:
【中国标准分类号】:Y56;C73
【国际标准分类号】:13_340_20
【页数】:8P.;A4
【正文语种】:英语