【英文标准名称】:Plastics-Determinationoftemperatureofdeflectionunderload-Generaltestmethod
【原文标准名称】:塑料.载荷下挠曲温度的测定.一般试验方法
【标准号】:BSENISO75-1-2004
【标准状态】:现行
【国别】:英国
【发布日期】:2004-05-28
【实施或试行日期】:2004-05-28
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:温度测量;弯曲试验;试验设备;试验;尺寸稳定性;叠层板材;抗弯应力;热稳定性;试验条件;材料试验;塑料;测定;三点荷载;试样;定义;温度
【英文主题词】:Bendtesting;Bendingstress;Definition;Definitions;Determination;Dimensionalstability;Laminates;Materialstesting;Plastics;Temperature;Temperaturemeasurement;Testequipment;Testspecimens;Testing;Testingconditions;Thermalstability;Three-pointloading
【摘要】:1.1ISO75specifiesmethodsforthedeterminationofthetemperatureofdeflectionunderload(flexuralstressunderthree-pointloading)ofplastics.Differenttypesoftestspecimenanddifferentconstantloadsaredefinedtosuitdifferenttypesofmaterial.1.2ThispartofISO75givesageneraltestmethod,part2givesspecificrequirementsforplastics(includingfilledplasticsandfibre-reinforcedplasticsinwhichthefibrelength,priortoprocessing,isupto7,5mm)andebonitewhilepart3givesspecificrequirementsforhigh-strengththermosettinglaminatesandlong-fibre-reinforcedplasticsinwhichthefibrelengthisgreaterthan7,5mm.1.3Themethodsspecifiedaresuitableforassessingtherelativebehaviourofdifferenttypesofmaterialatelevatedtemperatureunderloadataspecifiedrateoftemperatureincrease.Theresultsobtaineddonotnecessarilyrepresentmaximumapplicabletemperatures,becauseinpracticeessentialfactorssuchastime,loadingconditionsandnominalsurfacestressmaydifferfromthetestconditions.Truecomparabilityofdatacanonlybeachievedformaterialshavingthesameroom-temperatureflexuralmodulus.1.4Themethodsspecifypreferreddimensionsforthetestspecimens.Testswhicharecarriedoutonspecimensofdifferentdimensions,oronspecimenswhicharepreparedunderdifferentconditions,mayproducedifferentresults.Consequently,whenrepeatabledataarerequired,samplepreparationconditionsandtestvariablesshouldbecarefullycontrolledandrecorded.1.5Dataobtainedusingthetestmethodsdescribedmaynotbeusedtopredictactualend-useperformance.Thedataarenotintendedfordesignanalysisorpredictingtheenduranceofmaterialsatelevatedtemperatures.1.6Forpart2,twotestspecimenpositionsareallowed.However,theflatwisepositionisthepreferredandrecommendedone,whiletestingintheedgewisepositionisdescribedasoptionalonly.Itisintendedtoremovethisspecimenpositionaltogetheronoccasionofthenextrevisionofthisstandard.Part3onlyallowsflatwisetesting.1.7ThismethodiscommonlyknownastheHDTtest(heatdeflectiontestorheatdistortiontest),althoughthereisnoofficialdocumentusingthisdesignation.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:22P;A4
【正文语种】:英语