ASTM F736-1995(2006) 用落锤冲击法测定整块聚碳酸酯薄板抗冲击性的试验方法
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【英文标准名称】:StandardTestMethodforImpactResistanceofMonolithicPolycarbonateSheetbyMeansofaFallingWeight
【原文标准名称】:用落锤冲击法测定整块聚碳酸酯薄板抗冲击性的试验方法
【标准号】:ASTMF736-1995(2006)
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:F07.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:聚碳酸酯;抗冲击(强度);板;航空航天运输;航天技术;试验;材料
【英文主题词】:fallingweight;impactresistance;polycarbonate
【摘要】:Thispracticeisapplicableforqualitativelyevaluatingcoatedanduncoatedmonolithicpolycarbonatesheetmaterial,formonitoringprocesscontrol,forscreeningstudies,andasanaidinthepredictionofhardwareperformancewhenexposedtoimpactserviceconditions.AlimitationofTypeAspecimentestingisthatathicksheetmaynotfailsincetheavailableimpactenergyislimitedbythemaximumdropheightandfallingweightcapacityofthetestapparatus.UseSpecimenTypeAformateriallessthan12.7mm(0.50in.)thick.Withintherangeofdropheightsofthissystem,testsemployingdifferentvelocitiesarenotexpectedtoproducedifferentresults.However,foragivenseriesoftests,itisrecommendedthatthedropheightbeheldapproximatelyconstantsothatvelocityofimpact(strainrate)willnotbeavariable.Asthepolycarbonatespecimenundergoeslargeplasticdeformationunderimpact,thedown(oppositeimpact)sideisundertensileloadingandmostinfluentialininitiatingfailure.Polycarbonatesheetcoatedononesidemayyieldsignificantlydifferenttestresultswhentestedwiththecoatedsidedownversusthecoatedsideup.DirectcomparisonofspecimenTypeAandspecimenTypeBtestresultsshouldnotbeattempted.Fortestprogramsthatwillrequirethecomparisonofinterlaboratorytestresultsthespecimentypeandtheapproximatedropheightmustbespecified.Monolithicpolycarbonatesheetisnotchsensitive.Dataobtainedfromothertestmethods,particularlynotchedIzod/Charpytestresults,andextremelyhigh-orlow-strainratetestresults,shouldnotbecompareddirectlytodataobtainedfromthismethod.ItisnotedthatTypeAspecimens,freeofflaws,havenotexperiencedthecharacteristicductile-to-brittletransitionbetweenthin,lessthan3.18mm(1/8in.),andthick,greaterthan7.94mm(5/16in.),sheetasreflectedbyothertestmethods.1.1Thistestmethodcoversthedeterminationoftheenergyrequiredtoinitiatefailureinmonolithicpolycarbonatesheetmaterialunderspecifiedconditionsofimpactusingafreefallingweight.1.2Twospecimentypesaredefinedasfollows:1.2.1TypeAconsistsofaflatplatetestspecimenandemploysaclampedringsupport.1.2.2TypeBconsistsofasimplysupportedthree-pointloadedbeamspecimen(Fig.1)andisrecommendedforusewithmaterialwhichcannotbefailedusingtheTypeAspecimen.Foramaximumdropheightof6.096m(20ft)andamaximumdropweightof22.68kg(50lb),virginpolycarbonategreaterthan12.70mm(1/2in.)thickwillprobablyrequireuseoftheTypeBspecimen.Note1-SeealsoASTMMethods:D1709,D2444andD3029.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatement,SeeSection7.
【中国标准分类号】:G30
【国际标准分类号】:83_140_10
【页数】:6P.;A4
【正文语种】:
【原文标准名称】:用落锤冲击法测定整块聚碳酸酯薄板抗冲击性的试验方法
【标准号】:ASTMF736-1995(2006)
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:F07.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:聚碳酸酯;抗冲击(强度);板;航空航天运输;航天技术;试验;材料
【英文主题词】:fallingweight;impactresistance;polycarbonate
【摘要】:Thispracticeisapplicableforqualitativelyevaluatingcoatedanduncoatedmonolithicpolycarbonatesheetmaterial,formonitoringprocesscontrol,forscreeningstudies,andasanaidinthepredictionofhardwareperformancewhenexposedtoimpactserviceconditions.AlimitationofTypeAspecimentestingisthatathicksheetmaynotfailsincetheavailableimpactenergyislimitedbythemaximumdropheightandfallingweightcapacityofthetestapparatus.UseSpecimenTypeAformateriallessthan12.7mm(0.50in.)thick.Withintherangeofdropheightsofthissystem,testsemployingdifferentvelocitiesarenotexpectedtoproducedifferentresults.However,foragivenseriesoftests,itisrecommendedthatthedropheightbeheldapproximatelyconstantsothatvelocityofimpact(strainrate)willnotbeavariable.Asthepolycarbonatespecimenundergoeslargeplasticdeformationunderimpact,thedown(oppositeimpact)sideisundertensileloadingandmostinfluentialininitiatingfailure.Polycarbonatesheetcoatedononesidemayyieldsignificantlydifferenttestresultswhentestedwiththecoatedsidedownversusthecoatedsideup.DirectcomparisonofspecimenTypeAandspecimenTypeBtestresultsshouldnotbeattempted.Fortestprogramsthatwillrequirethecomparisonofinterlaboratorytestresultsthespecimentypeandtheapproximatedropheightmustbespecified.Monolithicpolycarbonatesheetisnotchsensitive.Dataobtainedfromothertestmethods,particularlynotchedIzod/Charpytestresults,andextremelyhigh-orlow-strainratetestresults,shouldnotbecompareddirectlytodataobtainedfromthismethod.ItisnotedthatTypeAspecimens,freeofflaws,havenotexperiencedthecharacteristicductile-to-brittletransitionbetweenthin,lessthan3.18mm(1/8in.),andthick,greaterthan7.94mm(5/16in.),sheetasreflectedbyothertestmethods.1.1Thistestmethodcoversthedeterminationoftheenergyrequiredtoinitiatefailureinmonolithicpolycarbonatesheetmaterialunderspecifiedconditionsofimpactusingafreefallingweight.1.2Twospecimentypesaredefinedasfollows:1.2.1TypeAconsistsofaflatplatetestspecimenandemploysaclampedringsupport.1.2.2TypeBconsistsofasimplysupportedthree-pointloadedbeamspecimen(Fig.1)andisrecommendedforusewithmaterialwhichcannotbefailedusingtheTypeAspecimen.Foramaximumdropheightof6.096m(20ft)andamaximumdropweightof22.68kg(50lb),virginpolycarbonategreaterthan12.70mm(1/2in.)thickwillprobablyrequireuseoftheTypeBspecimen.Note1-SeealsoASTMMethods:D1709,D2444andD3029.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatement,SeeSection7.
【中国标准分类号】:G30
【国际标准分类号】:83_140_10
【页数】:6P.;A4
【正文语种】:
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