ASTM_D_8054_-_D_8054M_-_22.pdf

Designation:D8054/D8054M22Standard Test Methods forTensile Testing of Para-Aramid Flat Yarns1This standard is issued under the fixed designation D8054/D8054M;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.1.Scope1.1 These test methods cover the tensile testing of para-aramid flat yarns.The methods include testing procedure onlyand include no specifications or tolerances.1.2 This standard includes the following test methods:SectionLinear Density10Force at Specified Elongation(FASE)11Modulus111.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D76 Specification for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD1776/D1776M Practice for Conditioning and Testing Tex-tilesD1907/D1907M Test Method for Linear Density of Yarn(Yarn Number)by the Skein MethodD2258 Practice for Sampling Yarn for TestingD3800 Test Method for Density of High-Modulus FibersD4848 Terminology Related to Force,Deformation andRelated Properties of TextilesD6477 Terminology Relating to Tire Cord,Bead Wire,HoseReinforcing Wire,and FabricsD6587 Test Method for Yarn Number Using AutomaticTesterD7269 Test Methods for Tensile Testing of Aramid YarnsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3.Terminology3.1 The following terms are relevant to this standard:elongation,flat yarn,force at specified elongation(FASE),force-elongation curve,modulus.3.2 For definitions of terms related to industrial fibers andmetallic reinforcements,see Terminology D6477.3.3 For definitions of terms related to force and deformationin textiles,refer to Terminology D4848.3.4 For definitions of other terms related to textiles,refer toTerminology D123.4.Summary of Test Methods4.1 Using various test methods and protocols identified inthe procedures,this standard determines the tensile strength,force at specified elonation(FASE),linear density and modulusof para-aramid flat yarns.5.Significance and Use5.1 For application areas such as optical fiber and cablereinforcements,aramid is usually used in a linear not twisted form.For designing constructions like this,it is essential touse data based on a specimen without twist applied.5.1.1 The modulus and FASE of twisted yarns demonstratereduced values when compared to p-aramid flat yarns.5.1.2 Use Test Method D7269 for testing of twistedp-aramid yarns.5.2 The levels of tensile properties obtained when testingaramid yarns are dependent on the age and history of the1These test methods are under the jurisdiction of ASTM Committee D13 onTextiles and are the direct responsibility of Subcommittee D13.19 on IndustrialFibers and Metallic Reinforcements.Current edition approved Nov.1,2022.Published November 2022.DOI:10.1520/D8054_D8054M-22.2For 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 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.1specimen and on the specific conditions used during the test.Among these conditions are rate of stretching,type of clamps,gauge length of specimen,temperature and humidity of theatmosphere,rate of airflow across the specimen,and tempera-ture and moisture content of the specimen.Testing conditionsaccordingly are specified precisely to obtain reproducible t