基本信息
| 标准名称： | 公共厕所设计导则 |
| 发布日期： | |
| 实施日期： | |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 工程建设 工程抗震 工程防火 人防工程 工程抗震 建筑材料和建筑物 建筑物的防护 地震和防振
【英文标准名称】:StandardTestMethodforDynamicYoung''sModulus,ShearModulus,andPoisson''sRatioofRefractoryMaterialsbyImpulseExcitationofVibration
【原文标准名称】:用振动的脉冲激励法测试耐火材料动态杨式模量、剪切模量及泊松比的标准方法
【标准号】:ASTMC1548-2002(2007)
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:C08.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:激励;脉冲;振动;耐火材料;杨氏模量;剪切模量;动态的;泊松比;耐熔制品
【英文主题词】:dynamicshearmodulus;dynamicPoisson'sratio;dynamicYoung'smodulus;elasticproperties;impulseexcitation;refractoryshapes
【摘要】:Thistestmethodisnon-destructiveandiscommonlyusedformaterialcharacterizationanddevelopment,designdatageneration,andqualitycontrolpurposes.Thetestassumesthatthepropertiesofthespecimenareperfectlyisotropic,whichmaynotbetrueforsomerefractorymaterials.Thetestalsoassumesthatthespecimenishomogeneousandelastic.Specimensthataremicro-crackedaredifficulttotestsincetheydonotyieldconsistentresults.Specimenswithlowdensitieshaveadampingeffectandareeasilydamagedlocallyattheimpactpoint.Insulatingbrickscangenerallybetestedwiththistechnique,butfibrousinsulatingmaterialsaregenerallytooweakandsofttotest.Forqualitycontroluse,thetestmethodmaybeusedformeasuringonlyresonantfrequenciesofanystandardsizespecimen.Anelasticmoduluscalculationmaynotbeneededorevenfeasibleiftheshapeisnon-standard,suchasaslidegateplatecontainingahole.Sincespecimenswillvaryinbothsizeandmass,acceptablefrequenciesforeachshapeandmaterialmustbeestablishedfromstatisticaldata.Dimensionalvariationscanhaveasignificanteffectonmodulusvaluescalculatedfromthefrequencymeasurements.Surfacegrindingmayberequiredtobringsomematerialsintothespecifiedtolerancerange.Sincecylindricalshapesarenotcommonlymadefromrefractorymaterialstheyarenotcoveredbythistestmethod,butarecoveredinTestMethodC215.1.1ThistestmethodcoversthemeasurementofthefundamentalresonantfrequenciesforthepurposeofcalculatingthedynamicYoung''smodulus,thedynamicshearmodulus(alsoknownasthemodulusofrigidity),andthedynamicPoisson''sratioofrefractorymaterialsatambienttemperatures.Specimensofthesematerialspossessspecificmechanicalresonantfrequencies,whicharedeterminedbytheelasticmodulus,mass,andgeometryofthetestspecimen.Therefore,thedynamicelasticpropertiescanbecomputedifthegeometry,mass,andmechanicalresonantfrequenciesofasuitablespecimencanbemeasured.ThedynamicYoung''smodulusisdeterminedusingtheresonantfrequencyintheflexuralmodeofvibrationandthedynamicshearmodulusisdeterminedusingtheresonantfrequencyinthetorsionalmodeofvibration.Poisson''sratioiscomputedfromthedynamicYoung''smodulusandthedynamicshearmodulus.1.2Althoughnotspecificallydescribedherein,thismethodcanalsobeperformedathightemperatureswithsuitableequipmentmodificationsandappropriatemodificationstothecalculationstocompensateforthermalexpansion.1.3ThevaluesarestatedinSIunitsandaretoberegardedasthestandard.1.4Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q40
【国际标准分类号】:81_080
【页数】:7P.;A4
【正文语种】: