【英文标准名称】:Fibre-reinforcedplasticcomposites-Determinationofflexuralproperties
【原文标准名称】:纤维增强塑料复合材料.挠性性能的测定
【标准号】:BSENISO14125-1998
【标准状态】:作废
【国别】:英国
【发布日期】:1998-06-15
【实施或试行日期】:1998-06-15
【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】:数学计算;热固性聚合物;热塑性聚合物;试验条件;弹性;塑料;增强的材料;试验设备;挠性;弯曲试验;纤维;试样;误差修正;挠曲试验;弹性模量;复合材料;报告;机械试验;试样制备
【英文主题词】:Bendtesting;Bendingbehaviour;Bendingstiffness;Definition;Definitions;Determination;Fibrereinforced;Flexibility;Flexuralstrength;Four-pointmethods;Laminates;Materials;Mechanicaltesting;Plastics;Reinforcedmaterials;Testspecimens;Testing;Three-pointmethods
【摘要】:1ThisInternationalStandardspecifiesamethodfordeterminingtheflexuralpropertiesoffibre-reinforcedplasticcompositesunderthree-point(MethodA)andfour-point(MethodB)loading.Standardtestspecimensaredefinedbutparametersincludedforalternativespecimensizesforusewhereappropriate.Arangeoftestspeedsisincluded.2Themethodisnotsuitableforthedeterminationofdesignparameters,butmaybeusedforscreeningmaterials,orasaquality-controltest.NOTE-Forexample,theflexuralmodulusisonlyanappropriatevalueofthetensileYoung'smodulusofelasticityasthetestisnotfortheadditionaldeflectionduetotheshearstresswhichleadstoalowervalueoftheflexuralmodulusbutusestestspan/specimenthicknessratiosthatminimisethiseffect.Differencesbetweentensileandflexuralpropertiesarealsocausedbythematerialstructure/lay-up.3Themethodissuitableforfibre-reinforcedthermoplasticandthermosettingplasticcomposites.Unreinforcedandparticle-filledplasticsandplasticsreinforcedwithshort(i.e.lessthan1mmlength)fibresarecoveredbyISO178.4Themethodisperformedusingspecimenswhichmaybemouldedtothechosendimensions,machinedfromthecentralportionofthestandardmulti-purposetestspecimen(seeISO3167)ormachinedfromsemi-finishedorfinishedproductssuchasmouldingsorlaminates.5Themethodspecifiespreferreddimensionsforthespecimen.Testswhicharecarriedoutonspecimensofotherdimensions,oronspecimenswhicharepreparedunderdifferentconditions,mayproduceresultswhicharenotcomparable.Otherfactors,suchasthespeedoftestingandtheconditioningofthespecimenscaninfluencetheresults.Formaterialswhicharenothomogeneousthroughthesection,orabovethelinear-elasticresponseregion,theresultappliesonlytothethicknessandstructuretested.Consequently,whencomparativedataarerequired,thesefactorsmustbecarefullycontrolledandrecorded.
【中国标准分类号】:Q23
【国际标准分类号】:83_120
【页数】:26P.;A4
【正文语种】:英语


【英文标准名称】:Vibrationsinbuildings-Part1:Predictionofvibrationparameters
【原文标准名称】:建筑物振动.第1部分:振动参数预测
【标准号】:DIN4150-1-2001
【标准状态】:现行
【国别】:德国
【发布日期】:2001-06
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:特征摆动;振动数量;建筑;振动隔绝;振动;振动;力;静止的;原则;预测;冲击;瞬时的;固定的;周期的;定义;声学;额定值;测量;测定
【英文主题词】:ratings;vibrations;definition;definitions;periodic;acoustics;construction;forecasting;principles;vibration;force;characteristicoscillation;vibrationquantity;shock;stationary;measurement;vibrationin
【摘要】:Thedocumentgivesguidelinesforthepredictionofvibrationsandcomprisesmethods,instructionsandadvices,ontheirbasisvaluesofvibrationparameterscanbepredicted.AnevaluationofvibrationeffectsafterDIN4150-2andDIN4150-3arepossiblewiththosevalues.
【中国标准分类号】:P31
【国际标准分类号】:91_120_25
【页数】:40P;A4
【正文语种】:德语