ASTM_C_1425_-_13.pdf

Designation:C142513Standard Test MethodInterlaminar Shear Strength of 1D and 2D ContinuousFiber-Reinforced Advanced Ceramics at ElevatedTemperatures1This standard is issued under the fixed designation C1425;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.Scope*1.1 This test method addresses the compression of a double-notched test specimen to determine interlaminar shear strengthof continuous fiber-reinforced ceramic composites(CFCCs)atelevated temperatures.Failure of the test specimen occurs byinterlaminar shear between two centrally located notchesmachined halfway through the thickness of the test specimenand spaced a fixed distance apart on opposing faces(see Fig.1).Test specimen preparation methods and requirements,testing modes(force or displacement control),testing rates(force rate or displacement rate),data collection,and reportingprocedures are addressed.1.2 This test method is used for testing advanced ceramic orglass matrix composites with continuous fiber reinforcementhaving a laminated structure such as in unidirectional(1-D)orbidirectional(2-D)fiber architecture(lay-ups of unidirectionalplies or stacked fabric).This test method does not addresscomposites with nonlaminated structures,such as(3-D)fiberarchitecture or discontinuous fiber-reinforced,whisker-reinforced,or particulate-reinforced ceramics.1.3 Values expressed in this test method are in accordancewith the International System of Units(SI)and IEEE/ASTMSI 10.1.4 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.Specific precau-tionary statements are noted in 8.1 and 8.2.2.Referenced Documents2.1 ASTM Standards:2C1145 Terminology of Advanced CeramicsC1292 Test Method for Shear Strength of Continuous Fiber-Reinforced Advanced Ceramics at Ambient TemperaturesD695 Test Method for Compressive Properties of RigidPlasticsD3846 Test Method for In-Plane Shear Strength of Rein-forced PlasticsD3878 Terminology for Composite MaterialsD6856/D6856M Guide for Testing Fabric-Reinforced“Tex-tile”Composite MaterialsE4 Practices for Force Verification of Testing MachinesE6 Terminology Relating to Methods of Mechanical TestingE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE220 Test Method for Calibration of Thermocouples ByComparison TechniquesE230 Specification and Temperature-Electromotive Force(EMF)Tables for Standardized ThermocouplesE337 Test Method for Measuring Humidity with a Psy-chrometer(the Measurement of Wet-and Dry-Bulb Tem-peratures)IEEE/ASTM SI 10 American National Standard for Use ofthe International System of Units(SI):The Modern MetricSystem3.Terminology3.1 DefinitionsThe definitions of terms relating to shearstrength testing appearing in Terminology E6 apply to theterms used in this test method.The definitions of terms relatingto advanced ceramics appearing in Terminology C1145 apply1This 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.15,2013.Published April 2013.Originallyapproved in 1999.Last previous edition approved in 2011 as C1425 11.DOI:10.1520/C1425-13.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 to the terms used in this test method.The definitions of termsrelating to fiber-reinforced composites appearing in Terminol-ogy D3878 apply to the terms used in this test method.3.2 Definitions of Terms Specific to This Standard:3.2.1 shear failure force(F),nmaximum force required tofracture a shear-loaded test specimen.C12923.2.2 shear strength(FL-2),nmaximum shear stress that amaterial is capable of sustaining.Shear strength is calculatedfrom the failure force in shear and the shear area.C12924.Summary of Test Method4.1 This test method addresses the determination of theinterlaminar shear strength of CFCCs at elevated temperatures.The interlaminar shear strength of CFCCs,as determined bythis test method,is measured by loading in compression adouble-notched test specimen of uniform width.Failure of thetest specimen occurs by interlaminar shear between twocentrally located notches machined ha