ASTM_D_3479_-_D_3479M_-_12.pdf

Designation:D3479/D3479M12Standard Test Method forTension-Tension Fatigue of Polymer Matrix CompositeMaterials1This standard is issued under the fixed designation D3479/D3479M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method determines the fatigue behavior ofpolymer matrix composite materials subjected to tensile cyclicloading.The composite material forms are limited tocontinuous-fiber or discontinuous-fiber reinforced compositesfor which the elastic properties are specially orthotropic withrespect to the test direction.This test method is limited tounnotched test specimens subjected to constant amplitudeuniaxial in-plane loading where the loading is defined in termsof a test control parameter.1.2 This test method presents two procedures where eachdefines a different test control parameter.1.2.1 Procedure AA system in which the test controlparameter is the load(stress)and the machine is controlled sothat the test specimen is subjected to repetitive constantamplitude load cycles.In this procedure,the test controlparameter may be described using either engineering stress orapplied load as a constant amplitude fatigue variable.1.2.2 Procedure BA system in which the test controlparameter is the strain in the loading direction and the machineis controlled so that the test specimen is subjected to repetitiveconstant amplitude strain cycles.In this procedure,the testcontrol parameter may be described using engineering strain inthe loading direction as a constant amplitude fatigue variable.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD3039/D3039M Test Method for Tensile Properties of Poly-mer Matrix Composite MaterialsD3878 Terminology for Composite MaterialsD5229/D5229M Test Method for MoistureAbsorption Prop-erties and Equilibrium Conditioning of Polymer MatrixComposite MaterialsE4 Practices for Force Verification of Testing MachinesE6 Terminology Relating to Methods of Mechanical TestingE83 Practice for Verification and Classification of Exten-someter SystemsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE467 Practice for Verification of Constant Amplitude Dy-namic Forces in an Axial Fatigue Testing SystemE739 Practice for StatisticalAnalysis of Linear or LinearizedStress-Life(S-N)and Strain-Life(-N)Fatigue DataE1012 Practice for Verification of Testing Frame and Speci-men Alignment Under Tensile and Compressive AxialForce ApplicationE1823 Terminology Relating to Fatigue and Fracture Testing3.Terminology3.1 DefinitionsTerminology D3878 defines terms relatingto high-modulus fibers and their composites.TerminologyE1823 defines terms relating to fatigue.Terminology D883defines terms relating to plastics.Terminology E6 defines terms1This test method is under the jurisdiction of ASTM Committee D30 onComposite Materials and is the direct responsibility of Subcommittee D30.04 onLamina and Laminate Test Methods.Current edition approved Aug.1,2012.Published January 2013.Originallyapproved in 1976.Last previous edition approved in 2007 as D3479/D3479M 96(2007).DOI:10.1520/D3479_D3479M-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 relating to mechanical testing.Terminology E456 and PracticeE177 define terms relating to statistics.In the event of aconflict between terms,Terminology D3878 shall have prece-dence over the other standards.3.2 Definitions of Terms Specific to This Standard:Thefollowing definitions shall have precedence over TerminologyD3878 and over other standards.3.2.1 constant amplitude loading,nin fatigue,a loading inwhich all of the peak values of