【英文标准名称】:StandardGuideforDefiningBoundaryConditionsinGround-WaterFlowModeling
【原文标准名称】:确定地下水流型初始条件的标准指南
【标准号】:ASTMD5609-1994(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1994
【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】:D18.21
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:aquifers;boundarycondition;ground-watermodel;Aquifers;Boundaryconditions;Ground-watermodel;Stress-dependency;Watertable
【摘要】:Accuratedefinitionofboundaryconditionsisanessentialpartofconceptualizingandmodelingground-waterflowsystems.Thisguidedescribesthepropertiesofthemostcommonboundaryconditionsencounteredinground-watersystemsanddiscussesmajoraspectsoftheirdefinitionandapplicationinground-watermodels.Italsodiscussesthesignificanceandspecificationofboundaryconditionsforsomefieldsituationsandsomecommonerrorsinspecifyingboundaryconditionsinground-watermodels.1.1Thisguidecoversthespecificationofappropriateboundaryconditionsthatareanessentialpartofconceptualizingandmodelingground-watersystems.Thisguidedescribestechniquesthatcanbeusedindefiningboundaryconditionsandtheirappropriateapplicationformodelingsaturatedground-waterflowmodelsimulations.1.2Thisguideisoneofaseriesofstandardsonground-waterflowmodelapplications.DefiningboundaryconditionsisastepinthedesignandconstructionofamodelthatistreatedgenerallyinGuideD5447.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject''smanyuniqueaspects.Thewordx201C;Standardx201D;inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.
【中国标准分类号】:P12
【国际标准分类号】:13_060_10
【页数】:4P.;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodsforNotchedBarImpactTestingofMetallicMaterials
【原文标准名称】:金属材料的切口棒材冲击测试用标准试验方法
【标准号】:ASTME23-2007ae1
【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】:E28.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:冲击测试;材料;机械测试;金属的;金属;测试
【英文主题词】:Charpytest;fractureappearance;Izodtest;impacttest;notchedspecimens;pendulummachine
【摘要】:Thesetestmethodsofimpacttestingrelatespecificallytothebehaviorofmetalwhensubjectedtoasingleapplicationofaforceresultinginmulti-axialstressesassociatedwithanotch,coupledwithhighratesofloadingandinsomecaseswithhighorlowtemperatures.Forsomematerialsandtemperaturestheresultsofimpacttestsonnotchedspecimens,whencorrelatedwithserviceexperience,havebeenfoundtopredictthelikelihoodofbrittlefractureaccurately.FurtherinformationonsignificanceappearsinAppendixX1.1.1Thesetestmethodsdescribenotched-barimpacttestingofmetallicmaterialsbytheCharpy(simple-beam)testandtheIzod(cantilever-beam)test.Theygivetherequirementsfor:testspecimens,testprocedures,testreports,testmachines(seeAnnexA1)verifyingCharpyimpactmachines(seeAnnexA2),optionaltestspecimenconfigurations(seeAnnexA3),precrackingCharpyV-notchspecimens(seeAnnexA4),designationoftestspecimenorientation(seeAnnexA5),anddeterminingthepercentofshearfractureonthesurfaceofbrokenimpactspecimens(seeAnnexA6).Inaddition,informationisprovidedonthesignificanceofnotched-barimpacttesting(seeAppendixX2),methodsofmeasuringthecenterofstrike(seeAppendixX2).1.2Thesetestmethodsdonotaddresstheproblemsassociatedwithimpacttestingattemperaturesbelow-196C(-320F,77K).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Inch-poundunitsareprovidedforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection5.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:28P.;A4
【正文语种】: