Designation:D5449/D5449M−22StandardTestMethodforTransverseCompressivePropertiesofHoopWoundPolymerMatrixCompositeCylinders1ThisstandardisissuedunderthefixeddesignationD5449/D5449M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethoddeterminesthetransversecompressivepropertiesofwoundpolymermatrixcompositesreinforcedbyhigh-moduluscontinuousfibers.Itdescribestestingofhoopwound(90°)cylindersinaxialcompressionfordeterminationoftransversecompressiveproperties.1.2Thetechnicalcontentofthistestmethodhasbeenstablesince1993withoutsignificantobjectionfromitsstakeholders.Asthereislimitedtechnicalsupportforthemaintenanceofthistestmethod,changessincethatdatehavebeenlimitedtoitemsrequiredtoretainconsistencywithotherASTMD30Commit-teestandards,includingeditorialchangesandincorporationofupdatedguidanceonspecimenpreconditioningandenviron-mentaltesting.Thetestmethod,therefore,shouldnotbeconsideredtoincludeanysignificantchangesinapproachandpracticesince1993.Futuremaintenanceofthetestmethodwillonlybeinresponsetospecificrequestsandperformedonlyastechnicalsupportallows.1.3Units—ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemarenotnecessarilyexactequiva-lents;therefore,toensureconformancewiththestandard,eachsystemshallbeusedindependentlyoftheother,andvaluesfromthetwosystemsshallnotbecombined.1.3.1Withinthetext,theinch-poundunitsareshowninbrackets.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwas...
