Designation:D5397−07(Reapproved2012)StandardTestMethodforEvaluationofStressCrackResistanceofPolyolefinGeomembranesUsingNotchedConstantTensileLoadTest1ThisstandardisissuedunderthefixeddesignationD5397;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisusedtodeveloptestdatafromwhichthesusceptibilityofpolyolefingeomembranesheetmaterialtostresscrackingunderaconstanttensileloadconditionandanacceleratedenvironmentalconditioncanbeevaluated.1.2Thistestmethodmeasuresthefailuretimeassociatedwithagiventestspecimenataspecifiedtensileloadlevel.Resultsfromaseriesofsuchtestsutilizingarangeofloadlevelscanbeusedtoconstructastress-timeplotonalog-logaxis.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D638TestMethodforTensilePropertiesofPlasticsD883TerminologyRelatingtoPlasticsD4354PracticeforSamplingofGeosyntheticsandRolledErosionControlProducts(RECPs)forTestingD4833TestMethodforIndexPunctureResistanceofGeomembranesandRelatedProducts3.Terminology3.1Definitions:3.1.1geomembrane,n—verylowpermeabilitysyntheticmembranelinersorbarriersusedwithanygeotechnicalengi-neeringrelatedmaterialsoastocontrolfluidmigrationinaman-madeproject,structure,orsystem(seeTestMethodD4833).3.1.2stresscrack,n—anexternalorinternalcrackinaplasticcausedbytensilestresseslessthanitsshort-timemechanicalstrength(seeDefinitionsD883).3.1.2.1Discussion—Thedevelopmentofsuchcracksisfrequentlyacceleratedbytheenvironmenttowhichtheplasticisexpo...
