ASTM_C_1292_-_16.pdf

Designation:C129216Standard Test Method forShear Strength of Continuous Fiber-Reinforced AdvancedCeramics at Ambient Temperatures1This standard is issued under the fixed designation C1292;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 covers the determination of shearstrength of continuous fiber-reinforced ceramic composites(CFCCs)at ambient temperature.The test methods addressedare(1)the compression of a double-notched test specimen todetermine interlaminar shear strength and(2)the Iosipescu testmethod to determine the shear strength in any one of thematerial planes of laminated composites.Test specimen fabri-cation methods,testing modes(load or displacement control),testing rates(load rate or displacement rate),data collection,and reporting procedures are addressed.1.2 This test method is used for testing advanced ceramic orglass matrix composites with continuous fiber reinforcementhaving uni-directional(1-D)or bi-directional(2-D)fiber archi-tecture.This test method does not address composites with(3-D)fiber architecture or discontinuous fiber-reinforced,whisker-reinforced,or particulate-reinforced ceramics.1.3 The values stated in SI units are to be regarded as thestandard and are in accordance with IEEE/ASTM SI 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 hazardstatements are given in 8.1 and 8.2.2.Referenced Documents2.1 ASTM Standards:2C1145 Terminology of Advanced CeramicsD695 Test Method for Compressive Properties of RigidPlasticsD3846 Test Method for In-Plane Shear Strength of Rein-forced PlasticsD3878 Terminology for Composite MaterialsD5379/D5379M Test Method for Shear Properties of Com-posite Materials by the V-Notched Beam MethodE4 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 ProcessE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE337 Test Method for Measuring Humidity with a Psy-chrometer(the Measurement of Wet-and Dry-Bulb Tem-peratures)E691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodIEEE/ASTM SI 10 American National Standard for Use ofthe International System of Units(SI):The Modern MetricSystem3.Terminology3.1 Definitions:3.1.1 The definitions of terms relating to shear strengthtesting appearing in Terminology E6 apply to the terms used inthis test method.The definitions of terms relating to advancedceramics appearing in Terminology C1145 apply to the termsused in this test method.The definitions of terms relating tofiber-reinforced composites appearing in Terminology D3878apply to the terms used in this test method.Additional termsused in conjunction with this test method are defined in thefollowing.3.1.2 advanced ceramicengineered high-performancepredominately nonmetallic,inorganic,ceramic material havingspecific functional attributes.3.1.3 continuous fiber-reinforced ceramic matrix composite(CFCC)ceramic matrix composite in which the reinforcingphase consists of a continuous fiber,continuous yarn,or awoven fabric.3.1.4 shear breaking force(F)maximum force required tofracture a shear-loaded test specimen.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 Jan.15,2016.Published February 2016.Originallyapproved in 1995.Last previous edition approved in 2010 as C1292 10.DOI:10.1520/C1292-16.2For 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 3.1.5 shear strength(F/L2)maximum shear stress that amaterial is capable of sustaining.Shear strength is calculatedfrom breaking force in shear and shear area.4.Summary of Test Method4.1 This test method addresses two methods to determinethe shear strength of CFCCs:(1)the compression test methodto determine interlaminar shear strength of a double-notchedtest specimen,3and(2)the Iosipescu test method to determinethe shear strength in any one of the material planes oflaminated CFCCs.44.1.1 Shear Test by Compression Loading of Double-Notched Test SpecimensThe inter