【英文标准名称】:StandardTestMethodsforSmallClearSpecimensofTimber
【原文标准名称】:洁净木材小样品试验的标准试验方法
【标准号】:ASTMD143-2009
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:clearspecimens;smallclearspecimens;timber;wood;Bendtesting--woodproducts;Clearwoodevaluation/testing;Cleavages;Compressiontesting--wood/woodproducts;Fieldtesting--woodproducts;Flexuraltesting--woodproducts;Hardnesstests--woodprodu
【摘要】:Thesetestmethodscovertestsonsmallclearspecimensofwoodthataremadetoprovidethefollowing:Dataforcomparingthemechanicalpropertiesofvariousspecies,Datafortheestablishmentofcorrectstrengthfunctions,whichinconjunctionwithresultsoftestsoftimbersinstructuralsizes(seeTestMethodsD198andTestMethodsD4761),affordabasisforestablishingallowablestresses,andDatatodeterminetheinfluenceonthemechanicalpropertiesofsuchfactorsasdensity,localityofgrowth,positionincrosssection,heightoftimberinthetree,changeofpropertieswithseasoningortreatmentwithchemicals,andchangefromsapwoodtoheartwood.1.1Thesetestmethodscoverthedeterminationofvariousstrengthandrelatedpropertiesofwoodbytestingsmallclearspecimens.1.1.1Thesetestmethodsrepresentproceduresforevaluatingthedifferentmechanicalandphysicalproperties,controllingfactorssuchasspecimensize,moisturecontent,temperature,andrateofloading.1.1.2SamplingandcollectionofmaterialisdiscussedinPracticeD5536.Sampledata,computationsheets,andcardshavebeenincorporated,whichwereofassistancetotheinvestigatorinsystematizingrecords.1.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.Whenaweightisprescribed,thebasicinch-poundunitofweight(lbf)andthebasicSIunitofmass(Kg)arecited.1.2Theproceduresforthevarioustestsappearinthefollowingorder:
Sections
PhotographsofSpecimens
5
ControlofMoistureContentandTemperature
6
RecordofHeartwoodandSapwood
7
StaticBending
8
CompressionParalleltoGrain
9
ImpactBending
10
Toughness
11
CompressionPerpendiculartoGrain
12
Hardness
13
ShearParalleltoGrain
14
Cleavage
15
TensionParalleltoGrain
16
TensionPerpendiculartoGrain
17
NailWithdrawal
18
SpecificGravityandShrinkageinVolume
19
RadialandTangentialShrinkage
20
MoistureDetermination