GB 3680-1983 耐晒黄10G
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基本信息
| 标准名称： | 耐晒黄10G |
| 中标分类： | 化工 >> 涂料、颜料、染料 >> 染料 |
| 替代情况： | 调整为HG/T 3004-1983(1997) |
| 发布日期： | |
| 实施日期： | 1984-03-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 1页 |
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所属分类： 化工 涂料 颜料 染料 染料
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基本信息
| 标准名称： | 长网成型机制造与验收技术条件 |
| 中标分类： | 农业、林业 >> 农、林机械与设备 >> 锯材、人造板机械与设备 |
| 发布日期： | 1991-07-07 |
| 实施日期： | 1992-01-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 3页 |
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所属分类： 农业 林业 农 林机械与设备 锯材 人造板机械与设备
【英文标准名称】:StandardTestMethodforDynamicYoung''sModulus,ShearModulus,andPoisson''sRatioforAdvancedCeramicsbySonicResonance【原文标准名称】:声谐振动测定动态扬氏模量、剪切模量和泊松比的标准试验方法
【标准号】:ASTMC1198-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:C28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:advancedceramics;bar;beam;cylindricalrod;dynamic;elasticmodulus;flexure;elasticproperties;Poisson'sratio;resonance;resonantbeam;shearmodulus;torsion;Young'smodulus;Advancedceramics;Audiooscillator;Dynamicelasticproperties;Elas
【摘要】:Thistestmethodmaybeusedformaterialdevelopment,characterization,designdatageneration,andqualitycontrolpurposes.Itisspecificallyappropriatefordeterminingthemodulusofadvancedceramicsthatareelastic,homogeneous,andisotropic.Thistestmethodisnondestructiveinnature.Onlyminutestressesareappliedtothespecimen,thusminimizingthepossibilityoffracture.Theperiodoftimeduringwhichmeasurementstressisappliedandremovedisoftheorderofhundredsofmicroseconds.Withthistestmethoditisfeasibletoperformmeasurementsathightemperatures,wheredelayedelasticandcreepeffectswouldinvalidatemodulusmeasurementscalculatedfromstaticloading.Thistestmethodhasadvantagesincertainrespectsovertheuseofstaticloadingsystemsformeasuringmoduliinadvancedceramics.Itisnondestructiveinnatureandcanbeusedforspecimenspreparedforothertests.Specimensaresubjectedtominutestrains;hence,themoduliaremeasuredatorneartheoriginofthestress-straincurvewiththeminimumpossibilityoffracture.Theperiodoftimeduringwhichmeasurementstressisappliedandremovedisoftheorderofhundredsofmicroseconds.Withthistestmethoditisfeasibletoperformmeasurementsathightemperatures,wheredelayedelasticandcreepeffectswouldinvalidatemodulusmeasurementscalculatedfromstaticloading.Thesonicresonantfrequencytechniquecanalsobeusedasanondestructiveevaluationtoolfordetectingandscreeningdefects(cracks,voids,porosity,densityvariations)inceramicparts.Thesedefectsmaychangetheelasticresponseandtheobservedresonantfrequencyofthetestspecimen.GuideE2001describesaprocedurefordetectingsuchdefectsinmetallicandnonmetallicpartsusingtheresonantfrequencymethod.1.1Thistestmethodcoversthedeterminationofthedynamicelasticpropertiesofadvancedceramics.Specimensofthesematerialspossessspecificmechanicalresonantfrequenciesthataredeterminedbytheelasticmodulus,mass,andgeometryofthetestspecimen.Therefore,thedynamicelasticpropertiesofamaterialcanbecomputedifthegeometry,mass,andmechanicalresonantfrequenciesofasuitabletestspecimenofthatmaterialcanbemeasured.DynamicYoung''smodulusisdeterminedusingtheresonantfrequencyintheflexuralmodeofvibration.Thedynamicshearmodulus,ormodulusofrigidity,isfoundusingtorsionalresonantvibrations.DynamicYoung''smodulusanddynamicshearmodulusareusedtocomputePoisson''sratio.1.2Thistestmethodmeasurestheresonantfrequenciesoftestspecimensofsuitablegeometrybymechanicallyexcitingthematcontinuouslyvariablefrequencies.Mechanicalexcitationofthebarsisprovidedthroughtheuseofatransducerthattransformsacyclicelectricalsignalintoacyclicmechanicalforceonthespecimen.Asecondtransducersensestheresultingmechanicalvibrationsofthespecimenandtransformsthemintoanelectricalsignal.Theamplitudeandfrequencyofthesignalaremeasuredbyanoscilloscopeorothermeanstodetectresonantvibrationinthedesiredmode.Theresonantfrequencies,dimensions,andmassofthespecimenareusedtocalculatedynamicYoung''smodulusanddynamicshearmodulus.(SeeFig.1)1.3Thistestmethodisspecificallyappropriateforadvancedceramicsthatareelastic,homogeneous,andisotropic(3).Advancedceramicsofacompositecharacter(particulate,whisker,orfiberreinforced)maybetestedbythistestmethodwiththeunderstandingthatthecharacter(volumefraction,size,morphology,distribution,orientation,elasticproperties,andinterfacialbonding)ofthereinforcementinthetest......
【中国标准分类号】:Q30
【国际标准分类号】:
【页数】:11P.;A4
【正文语种】:英语