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【英文标准名称】:Woodfibreboards-Definition,classificationandsymbols.
【原文标准名称】:木纤维板.定义、分类和符号
【标准号】:NFB54-050-2009
【标准状态】:现行
【国别】:法国
【发布日期】:2009-05-01
【实施或试行日期】:2009-05-08
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:应用;板材;分类;分类系统;定义;建筑用纤维板;硬的;作标记;厚板材;多孔的;性能;符号;术语;处理;使用;词汇;木纤维板;木材技术;木质板材
【英文主题词】:Applications;Boards;Classification;Classificationsystems;Definitions;Fibrebuildingboard;Hard;Marking;Plates;Porous;Properties;Symbols;Terminology;Treatment;Use;Vocabulary;Woodfibreboards;Woodtechnology;Woodbasedsheetmaterials
【摘要】:
【中国标准分类号】:B70
【国际标准分类号】:79_060_20
【页数】:10P;A4
【正文语种】:其他


【英文标准名称】:StandardTestMethodforPlastics:DynamicMechanicalProperties:InFlexure(DualCantileverBeam)
【原文标准名称】:塑料的标准试验方法:动态机械性能:弯曲(双悬臂梁)
【标准号】:ASTMD5418-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:弹性模数;塑料;产品;流变性能;流变学;试验
【英文主题词】:dualcantilever;dynamicmechanicalrheologicalproperties;lineardisplacement;modulus(storage;viscous;lossmodulus;andcomplex);tandelta;viscoelasticbehavior
【摘要】:Thistestmethodprovidesasimplemeansofcharacterizingthethermomechanicalbehaviorofplasticcompositionsusingaverysmallamountofmaterial.Sincesmalltestspecimengeometriesareused,itisessentialthatthespecimensberepresentativeofthematerialbeingtested.Thedataobtainedcanbeusedforqualitycontroland/orresearchanddevelopmentpurposes.Forsomeclassesofmaterials,suchasthermosets,itcanalsobeusedtoestablishoptimumprocessingconditions.Dynamicmechanicaltestingprovidesasensitivemeansfordeterminingthermomechanicalcharacteristicsbymeasuringtheelasticandlossmoduliasafunctionoffrequency,temperature,ortime.Plotsofmoduliandtandeltaofamaterialversusthesevariablescanbeusedtoprovideagraphicrepresentationindicativeoffunctionalproperties,effectivenessofcure(thermosetting-resinsystems),anddampingbehaviorunderspecifiedconditions.Thistestmethodcanbeusedtoassessthefollowing:5.3.1Themodulusasafunctionoftemperatureoraging,orboth,5.3.2Themodulusasafunctionoffrequency,5.3.3Theeffectsofprocessingtreatment,includingorientation,inducedstress,anddegradationofphysicalandchemicalstructure,5.3.4Relativeresinbehavioralproperties,includingcureanddamping,5.3.5Theeffectsofsubstratetypesandorientation(fabrication)onelasticmodulus,and5.3.6Theeffectsofformulationadditivesthatmightaffectprocessabilityorperformance.Beforeproceedingwiththistestmethod,refertothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,orcombinationthereof,coveredintherelevantASTMmaterialspecificationshalltakeprecedenceoverthosementionedinthistestmethod.IftherearenorelevantASTMmaterialspecifications,thenthedefaultconditionsapply.1.1Thistestmethodoutlinestheuseofdynamicmechanicalinstrumentationfordeterminingandreportingtheviscoelasticpropertiesofthermoplasticandthermosettingresinsandcompositesystemsintheformofrectangularbarsmoldeddirectlyorcutfromsheets,plates,ormoldedshapes.Theelasticmodulusdatageneratedmaybeusedtoidentifythethermomechanicalpropertiesofaplasticsmaterialorcomposition.1.2Thistestmethodisintendedtoprovideameansfordeterminingtheviscoelasticpropertiesofawidevarietyofplasticsusingnonresonant,forced-vibrationtechniquesasoutlinedinPracticeD4065.Inparticular,thismethodidentifiestheproceduresusedtomeasurepropertiesusingwhatisknownasadual-cantileverbeamflexurearrangement.Plotsoftheelastic(storage)modulus,loss(viscous)modulus,andcomplexmodulus,andtandeltaasafunctionoffrequency,time,ortemperatureareindicativeofsignificanttransitionsinthethermomechanicalperformanceofthepolymericmaterialsystems.1.3Thistestmethodisvalidforawiderangeoffrequencies,typicallyfrom0.01to100Hz.1.4Apparentdiscrepanciesmayariseinresultsobtainedunderdifferingexperimentalconditions.Theseapparentdifferencesfromresultsobservedinanotherstudycanusuallybereconciled,withoutchangingtheobserveddata,byreportinginfull(asdescribedinthistestmethod)theconditionsunderwhichthedatawereobtained.1.5Testdataobtainedbythistestmethodarerelevantandappropriateforuseinengineeringdesign.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminethea......
【中国标准分类号】:G31
【国际标准分类号】:83_140_01
【页数】:4P.;A4
【正文语种】: