BS DD ENV 14272-2002 胶合板.一些机械特性的的计算方法
时间:2024-05-16 22:28:11 来源: 标准资料网 作者：标准资料网 阅读：9723
【英文标准名称】:Plywood-Calculationmethodforsomemechanicalproperties
【原文标准名称】:胶合板.一些机械特性的的计算方法
【标准号】:BSDDENV14272-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-07-26
【实施或试行日期】:2002-07-26
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:材料强度;数学计算;基础数据;定义;材料;板材;特性;计算方法;机械性能;硬挺度;胶合板;试验;木材;松散材料密度;木质板材;木材技术;建筑用木料;挠性;电容性负载
【英文主题词】:
【摘要】:ThisEuropeanPrestandardgivesacalculationmethodfortheestimationofsomemechanicalpropertiesofplywood(strengthandstiffness)withasymmetricalcomposition.Theresultingvaluesareintendedaspredictiveonly.
【中国标准分类号】:B70
【国际标准分类号】:79_060_10
【页数】:28P;A4
【正文语种】:英语
【英文标准名称】:StandardSpecificationforAmorphousMagneticCoreAlloys,Semi-ProcessedTypes
【原文标准名称】:半成品型非晶形磁芯合金标准规范
【标准号】:ASTMA901-2003(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:A06.02
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:amorphous;coercivefieldstrength;coreloss;induction;residualinduction;specificexcitingpower;Amorphousmagneticmaterial;Commercialpowerfrequencies;Ironalloys--specifications;Magneticmaterials/applications--specifications
【摘要】:1.1Thisspecificationcoversthegeneralrequirementstowhichflat-cast,amorphous,semi-processed,iron-basemagneticcorealloysmustconform.1.2Thesealloysareproducedbyarapid-quenching,direct-castingprocess,resultinginmetalswithnoncrystallinestructure.Themetallicalloysaremadetomeetspecifiedmaximumcore-lossvaluesandareintendedprimarilyforcommercialpowerfrequency(50-and60-Hz)applicationsinmagneticdevices.Desirablecore-lossandpermeabilitycharacteristicsaredevelopedbyfurtherheattreatmentinamagneticfieldbythepurchaser.Theheattreatmenttypicallyconsistsofheatingthematerialtoatemperatureof320to420x00B0;Cinadry,inertatmospherefor5to10min,althoughsoaktimesofupto2hmaybeusedforlargetransformercores.Amagneticfieldmayberequiredduringannealingasdesignatedbytheproducer.Exactoptimumannealingconditionsdependontheprocessingofthematerialandthesizeandshapeofthedevice.1.3Someofthesealloysaresensitivetomechanicalstress.Caremustbeexercisedinminimizinganystressesonthematerialinitsfinalapplication,otherwise,itsmagneticpropertieswillbeimpairedsignificantly.1.4Thisspecificationisdevelopedtoaidinthepurchaseoftransformergradeamorphousstrip.Itprovidesthechemical,physical,andmagneticparametersandproceduresforqualitycontroltests.1.5Thevaluesstatedincustomary(cgs-emuandinch-pound)unitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitswhichareprovidedforinformationonlyandarenotconsideredstandard.Note18212;Formoreinformationonproceduresassociatedwiththisspecification,refertothefollowing:PracticesA34/A34M,A664,A700,andB490;TestMethodsA370andA773/A773M.1.6Thisstandarddoesnotpurporttoaddressthesafetyconcernsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H53
【国际标准分类号】:29_100_10
【页数】:4P.;A4
【正文语种】:英语