ASTM_C_1773_-_17.pdf

Designation:C177317Standard Test Method forMonotonic Axial Tensile Behavior of Continuous Fiber-Reinforced Advanced Ceramic Tubular Test Specimens atAmbient Temperature1This standard is issued under the fixed designation C1773;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method determines the axial tensile strengthand stress-strain response of continuous fiber-reinforced ad-vanced ceramic composite tubes at ambient temperature undermonotonic loading.This test method is specific to tubegeometries,because fiber architecture and specimen geometryfactors are often distinctly different in composite tubes,ascompared to flat plates.1.2 In the test method a composite tube/cylinder with adefined gage section and a known wall thickness is fitted/bonded into a loading fixture.The test specimen/fixture assem-bly is mounted in the testing machine and monotonicallyloaded in uniaxial tension at ambient temperature while record-ing the tensile force and the strain in the gage section.The axialtensile strength and the fracture strength are determined fromthe maximum applied force and the fracture force.The strains,the proportional limit stress,and the tensile modulus ofelasticity are determined from the stress-strain data.1.3 This test method applies primarily to advanced ceramicmatrix composite tubes with continuous fiber reinforcement:uni-directional(1-D,filament wound and tape lay-up),bi-directional(2-D,fabric/tape lay-up and weave),and tri-directional(3-D,braid and weave).These types of ceramicmatrix composites are composed of a wide range of ceramicfibers(oxide,graphite,carbide,nitride,and other composi-tions)in a wide range of crystalline and amorphous ceramicmatrix compositions(oxide,carbide,nitride,carbon,graphite,and other compositions).1.4 This test method does not directly address discontinuousfiber-reinforced,whisker-reinforced or particulate-reinforcedceramics,although the test methods detailed here may beequally applicable to these composites.1.5 The test method describes a range of test specimen tubegeometries based on past tensile testing of ceramic compositetubes.These geometries are applicable to tubes with outerdiameters of 10 to 150 mm and wall thicknesses of 1 to 25 mm,where the ratio of the outer diameter-to-wall thickness(dO/t)is typically between 5 and 30.1.5.1 This test method is specific to ambient temperaturetesting.Elevated temperature testing requires high temperaturefurnaces and heating devices with temperature control andmeasurement systems and temperature-capable grips and load-ing fixtures,which are not addressed in this test method.1.6 The test method addresses test equipment,grippingmethods,testingmodes,allowablebendingstresses,interferences,tubular test specimen geometries,test specimenpreparation,test procedures,data collection,calculation,re-porting requirements,and precision/bias in the followingsections.SectionScope1Referenced Documents2Terminology3Summary of Test Method4Significance and Use5Interferences6Apparatus7Hazards8Test Specimens9Test Procedure10Calculation of Results11Report12Precision and Bias13Keywords14AnnexesInterferencesAnnex A1Test Specimen GeometryAnnex A2Grip Fixtures and Load Train CouplersAnnex A3Allowable Bending and Load Train AlignmentAnnex A4Test Modes and RatesAnnex A51.7 UnitsThe values stated in SI units are to be regardedas standard.1.8 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.Specific precau-tionary statements are given in Section 8.1This test method is under the jurisdiction of ASTM Committee C28 onAdvanced Ceramics and is the direct responsibility of Subcommittee C28.07 onCeramic Matrix Composites.Current edition approved Feb.1,2017.Published February 2017.Originallyapproved in 2013.Last previous edition approved in 2013 as C1773 13.DOI:10.1520/C1773-17.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 2.Referenced Documents2.1 ASTM Standards:2C1145 Terminology of Advanced CeramicsC1239 Practice for Reporting Uniaxial Strength Data andEstimating Weibull Distribution Parameters for AdvancedCeramicsC1273 Test Method for Tensile Strength of MonolithicAdvanced Ceramics at Ambient TemperaturesC155