【英文标准名称】:StandardTestMethodsforTensile,Compressive,andFlexuralCreepandCreep-RuptureofPlastics
【原文标准名称】:塑料的张力、压力和柔性蠕变以及蠕变断裂的标准试验方法
【标准号】:ASTMD2990-2009
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:creep;creep-rupture;plastics;Compressiontesting--plastics;Creep;Creeprupture;Flexuraltesting--plastics;Tensileproperties/testing--plastics;NumberCode83.080.01(Plastingeneral)
【摘要】:Datafromcreepandcreep-rupturetestsarenecessarytopredictthecreepmodulusandstrengthofmaterialsunderlong-termloadsandtopredictdimensionalchangesthatmayoccurasaresultofsuchloads.Datafromthesetestmethodscanbeused:(1)tocomparematerials,(2)inthedesignoffabricatedparts,(3)tocharacterizeplasticsforlong-termperformanceunderconstantload,and(4)undercertainconditions,forspecificationpurposes.Beforeproceedingwiththistestmethod,referenceshallbemadetothespecificationofthematerialbeingtested.Anyspecimenpreparation,conditioning,dimensions,and/ortestingparameterscoveredinthematerialspecificationshalltakeprecedenceoverthosementionedinthistestmethod,exceptincaseswheretodosowouldconflictwiththepurposeforconductingtesting.Iftherearenomaterialspecifications,thenthedefaultconditionsapply.1.1Thesetestmethodscoverthedeterminationoftensileandcompressivecreepandcreep-ruptureofplasticsunderspecifiedenvironmentalconditions(see3.1.3).1.2Whilethesetestmethodsoutlinetheuseofthree-pointloadingformeasurementofcreepinflexure,four-pointloading(whichisusedlessfrequently)canalsobeusedwiththeequipmentandprinciplesasoutlinedinTestMethodsD790.1.3Formeasurementsofcreep-rupture,tensionisthepreferredstressmodebecauseforsomeductileplasticsrupturedoesnotoccurinflexureorcompression.1.4Testdataobtainedbythesetestmethodsarerelevantandappropriateforuseinengineeringdesign.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Aspecificwarningstatementisgivenin6.8.2.Note18212;ThisstandardandISO899Parts1and2addressthesamesubjectmatter,butdifferintechnicalcontent(andresultscannotbedirectlycomparedbetweenthetwotestmethods).ISO899Part1addressestensilecreepandcreeptoruptureandISO899Part2addressesflexuralcreep.CompressivecreepisnotaddressedinISO899.
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:20P.;A4
【正文语种】:英语


Product Code:SAE AS8034
Title:Minimum Performance Standard for Airborne Multipurpose Electronic Displays
Issuing Committee:A-4ed Electronics Display Subcommittee
Scope:This SAE Aerospace Standard (AS) specifies minimum performance standards for Electronic Displays which are intended for use in the cockpit by the pilot or other flight personnel under standard and other environmental conditions.