ASTM_C_1341_-_13.pdf

Designation:C134113Standard Test Method forFlexural Properties of Continuous Fiber-ReinforcedAdvanced Ceramic Composites1This standard is issued under the fixed designation C1341;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 covers the determination of flexuralproperties of continuous fiber-reinforced ceramic compositesin the form of rectangular bars formed directly or cut fromsheets,plates,or molded shapes.Three test geometries aredescribed as follows:1.1.1 Test Geometry IA three-point loading system utiliz-ing center point force application on a simply supported beam.1.1.2 Test Geometry IIAA four-point loading system uti-lizing two force application points equally spaced from theiradjacent support points with a distance between force applica-tion points of one half of the support span.1.1.3 Test Geometry IIBA four-point loading system uti-lizing two force application points equally spaced from theiradjacent support points with a distance between force applica-tion points of one third of the support span.1.2 This test method applies primarily to all advancedceramic matrix composites with continuous fiber reinforce-ment:uni-directional(1-D),bi-directional(2-D),tri-directional(3-D),and other continuous fiber architectures.In addition,thistest method may also be used with glass(amorphous)matrixcomposites with continuous fiber reinforcement.However,flexural strength cannot be determined for those materials thatdo not break or fail by tension or compression in the outerfibers.This test method does not directly address discontinuousfiber-reinforced,whisker-reinforced,or particulate-reinforcedceramics.Those types of ceramic matrix composites are bettertested in flexure using Test Methods C1161 and C1211.1.3 Tests can be performed at ambient temperatures or atelevated temperatures.At elevated temperatures,a suitablefurnace is necessary for heating and holding the test specimensat the desired testing temperatures.1.4 This test method includes the following:SectionScope1Referenced Documents2Terminology3Summary of Test Method4Significance and Use5Interferences6Apparatus7Precautionary Statement8Test specimens9Procedures10Calculation of Results11Report12Precision and Bias13Keywords14ReferencesCFCC Surface Condition andFinishingAnnex A1Conditions and Issues in HotLoading of Test specimensinto FurnacesAnnex A2Toe Compensation on Stress-Strain CurvesAnnex A3Corrections for ThermalExpansion in FlexuralEquationsAnnex A4Example of Test ReportAppendix X11.5 The values stated in SI units are to be regarded as thestandard in accordance with IEEE/ASTM SI 10.1.6 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:2C1145 Terminology of Advanced CeramicsC1161 Test Method for Flexural Strength of AdvancedCeramics at Ambient TemperatureC1211 Test Method for Flexural Strength of AdvancedCeramics at Elevated TemperaturesC1239 Practice for Reporting Uniaxial Strength Data andEstimating Weibull Distribution Parameters for AdvancedCeramics1This 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 1996.Last previous edition approved in 2006 as C1341 06.DOI:10.1520/C1341-13.2For 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 C1292 Test Method for Shear Strength of Continuous Fiber-Reinforced Advanced Ceramics at Ambient TemperaturesD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-alsD2344/D2344M Test Method for Short-Beam Strength ofPolymer Matrix Composite Materials and Their LaminatesD3878 Terminology for Composite MaterialsD6856 Guide for Testing Fabric-Reinforced“Textile”Com-posite 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 ProcessE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE220