Designation:E2004−10StandardTestMethodforFacingCleavageofSandwichPanels1ThisstandardisissuedunderthefixeddesignationE2004;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationofthecleav-ageforcetopeelstifffacingsfromsandwichpanels.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1781TestMethodforClimbingDrumPeelforAdhesivesE4PracticesforForceVerificationofTestingMachines3.Terminology3.1Definitions:3.1.1adhesivefailure—failurethatiscompletelywithintheadhesivelayerwithnoevidenceofinterfacialdisbondingbetweenthecoreandtheadhesive,betweentheadhesiveandthefacing,andnoevidenceoftearingorrupturewithinthecore.3.1.2bondfailure—failurethatisinterfacialandiseither(a)betweentheadhesiveandthecore,or(b)betweentheadhesiveandthefacing;nocoreoradhesivefailurewillbeinevidenceinthistypeoffailure.3.1.2.1Discussion—Ifbondfailureoccursitshouldbespecifiedastowhetheritistype(a)or(b).3.1.3corefailure—failurethatiscompletelywithinthecorematerialandiscomprisedofatearingorruptureofthecorematerialwithnoevidenceofinterfacialdisbondingbetweenthecoreandtheadhesive,withintheadhesiveitself,orbetweentheadhesiveandthefacing.3.1.4mixed-modefailure—failurethatshowsevidenceofmorethanoneofthethreefailuremodesdescribedabove.3.1.4.1Discussion—Visuallyestimateandreporttheper-ce...
