【英文标准名称】:StandardSpecificationforEvaluationofDurationofLoadandCreepEffectsofWoodandWood-BasedProducts
【原文标准名称】:木制和木基产品的荷载和蠕变效应的持续时间的评价的标准规范
【标准号】:ASTMD6815-2009
【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】:D07.01
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:creeprate;creep-rupture;durationofload;fractionaldeflection;lumber;structuralcompositelumber;structural-usepanels;Durationofload;Fractionaldeflection;Lumber--specifications;Structuralcompositelumber(SCL)--specifications;Struc
【摘要】:1.1Thisspecificationprovidesaprocedurefortestingandevaluatingdurationofloadandcreepeffectsofwoodandwood-basedmaterialsrelativetoanaccepteddurationofloadadjustmentmodel.Thisspecificationwascreatedforproductsthatarecurrentlycoveredbyaconsensusstandard(forexample,lumber,structuralcompositelumber,andstructural-usepanels).ThisprocedureisintendedtodemonstratetheengineeringequivalencetothedurationofloadandcreepeffectsofvisuallygradedlumberasspecifiedinPracticeD245foraproductunderevaluationusedindryserviceconditions.Thisprocedureisnotintendedtoevaluatetheperformanceofproductsunderimpactloading.Quantificationofspecificdurationofloadorcreepfactorsisbeyondthescopeofthisspecification.ForfurtherguidanceregardingtheapplicabilityofthisspecificationrefertoX1.1intheCommentary.1.2UseoftheprocedureinthisspecificationtodetermineequivalencetothePracticeD245durationofloadrelationshipislimitedtosolidwoodandwood-basedproductswhoselongtermloadbehaviorissimilartothatofsolidwood.Equivalencedemonstratedinthisspecificationisdependentuponevaluationofaproduct''s90-day(minimum)creep-ruptureperformance.Inthisevaluation,threecriteriamustbesatisfied:(1)adequatestrengthovera90-dayperiod,(2)decreasingcreeprate,and(3)limitedfractionaldeflection.AsummaryofthedevelopmentofthesecriteriaandtheunderlyingassumptionsbehindthemisprovidedintheCommentaryinAppendixX1andAppendixX2.1.3Longtermdegradationphenomenanotdescribedbyacreep-rupturemodelarenotaddressedinthisspecification(seeCommentaryX1.2.4).
【中国标准分类号】:B71
【国际标准分类号】:79_080
【页数】:12P.;A4
【正文语种】:英语


【英文标准名称】:Aerospaceseries-Screws,panhead,offsetcruciformrecess,coarsetolerancenormalshank,shortthread,inalloysteel,cadmiumplated,classification:900MPa(atambienttemperature)/235°C;GermanversionEN2885:1996
【原文标准名称】:航空航天系列.镀镉合金钢短螺纹带翼型十字槽平头螺钉.等级:900MPa(室下)/235℃
【标准号】:EN2885-1996
【标准状态】:现行
【国别】:
【发布日期】:1996-03
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:分类系统;航天运输;尺寸公差;凹槽;钢;作标记;规范(验收);飞行器;合金钢;十字头紧固件;平头紧固件;抗拉强度;镉;凸头螺钉;飞行器部件;固定力矩十字形槽;表面处理;名称与符号;镉板;含镉合金;航空运输;平头螺钉;尺寸;螺钉;公差(测量);温度;航空航天运输
【英文主题词】:Aerospacetransport;Airtransport;Aircraft;Aircraftcomponents;Alloysteels;Cadmium;Cadmiumplated;Cadmium-containingalloys;Cheeseheadscrews;Classificationsystems;Cruciform-headfasteners;Designations;Dimensionaltolerances;Dimensions;Marking;Panheadscrews;Pan-headfasteners;Recesses;Screws(bolts);Spacetransport;Specification(approval);Steels;Surfacetreatment;Temperature;Tensilestrength;Tolerances(measurement);Torq-setrecesses
【摘要】:
【中国标准分类号】:V20
【国际标准分类号】:49_030_20
【页数】:10P.;A4
【正文语种】:英语