2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、Designation:D4385?13StardPracticefClassifyingVisualDefectsinThermosettingReinfcedPlasticPultrudedProducts1ThisstardisissuedunderthefixeddesignationD4385thenumberimmediatelyfollowingthedesignationindicatestheyearofiginala

2、doptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thispracticecoversacceptancecriteriafvi

3、sualacceptanceofthermosettingreinfcedplasticpultrudedrodsbarsshapessheets.1.2Thispracticepresentsdefinitionsofpossibledefectstoserveasaguidefcontractsdrawingsproductspecificationsfinalinspection.1.3Thevaluesstatedininchp

4、oundunitsaretoberegardedasstard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedfinfmationonlyarenotconsideredstard.1.4Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithi

5、tsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.NOTE1—ThereisnoknownISOequivalenttothisstard.2.ReferencedDocuments2.1ASTMSt

6、ards:2D3917SpecificationfDimensionalToleranceofThermosettingGlassReinfcedPlasticPultrudedShapes3.Terminology3.1matdiscolation—ayellowingofthereinfcingmatscausedbybindermigration.Thediscolationcancausevisualstreaksonthesu

7、rfaceofthepultrusion.3.2testrequirement—minimumdesignacteristicspecifiedvaluesasdictatedspecifiedbycodesstardsindustryendcustomersthemanufacturertheEngineerofRecd.3.3connectionareas—areasassociatedwithapultrudedmembertha

8、tfmaconnectioninsomefmfashionthatwillnotbevisibleafterfabrication.3.4fiberblooming—exposedreinfcementsonthesurfaceofaprofileasaresultofveilslippagelackofresin.Suchdefectscancausetheexposedfiberto“bloom”whenexposedtoultra

9、violetlight.3.5internallayer—referstoindividuallayersofunidirectionaltransversereinfcementsinthefmofrovingtowscontinuousfilamentwovenstitchedmatsfmedlaminatedviathepultrusionprocesstoproduceaspecificthicknessofaspartofap

10、ultrudedprofile.Astitchedwovenmatismadeupofindividuallayersofrovingwovenstitchedtogethertofmasinglemat4.AcceptanceCriteria4.1Themethodfrequencyofinspectionshallbetheresponsibilityofthepultruderasdeemednecessarytomaintain

11、compliancetothisspecificationunlessthepurchaserselleragreeonotherterms.4.2DimensionsTolerances—PultrudedshapesshallbeinspectedfconfmancewithdimensionstolerancesspecifiedontheproductdrawingbySpecificationD3917.Productswit

12、hanydimensionsexceedingthespecifiedlimitsshallberejected.4.3AllowableDefects—Defectsthatbynaturenumberfrequencyofoccurrencedonotaffecttheserviceabilityoftheproduct.Allowabledefectsshallbefullydescribedastothetypesizenumb

13、erextentallowedspacing.Defectsinexcessofthoselistedasallowabledefectsintheproductspecificationsdrawingscontractsftheproductsshallbecausefrejection.4.4RepairableDefects—Visualdefects(fexamplechipsexposedreinfcementfiberbr

14、idgingfiberprominence1ThispracticeisunderthejurisdictionofASTMCommitteeD20onPlasticsisthedirectresponsibilityofSubcommitteeD20.18onReinfcedThermosettingPlastics.CurrenteditionapprovedNov.152013.PublishedDecember2013.igin

15、allyapprovedin1984.Lastpreviouseditionapprovedin2010asD438510.DOI:10.1520D438513.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocu

16、mentSummarypageontheASTMwebsite.ASummaryofChangessectionappearsattheendofthisstardCopyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates1TABLE1ContinuedNameDefinitionAcceptanceReject

17、ionCriteriaBurnThermalDecompositionAdiscolationdisttiondestructionofthepultrudedsurfaceasaresultofthermaldecomposition.Notacceptable.Note—Thisdefectaffectsthestructuralserviceability.Note:Photoshowndepictsprofilenotmeeti

18、ngthespecification.Chips(Gouges)Mindamagetothepultrudedsurfacethatremovesmaterialbutdoesnotcauseacrackcraze.Notover0.393in.(10mm)widelong.Notmethanfiveper10ft(3.048m)length.Chipsthatperatepastthedepthofthesurfaceveilaren

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