Designation:D5448/D5448M−22StandardTestMethodforInplaneShearPropertiesofHoopWoundPolymerMatrixCompositeCylinders1ThisstandardisissuedunderthefixeddesignationD5448/D5448M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethoddeterminestheinplaneshearpropertiesofwoundpolymermatrixcompositesreinforcedbyhigh-moduluscontinuousfibers.Itdescribestestingofhoopwound(90°)cylindersintorsionfordeterminationofinplaneshearproperties.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.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternatio...
