ASTM_F_1752_-_96_2014.pdf

Designation:F175296(Reapproved 2014)An American National StandardStandard Test Method forArchery Bow ComponentCord Material1This standard is issued under the fixed designation F1752;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 establishes the classification and test-ing of cord as a component material used in the fashioning ofbowstrings.1.2 This test method is not intended to provide informationbeyond any evaluation of the cord material that would deter-mine its fitness for use other than in the fabrication ofcompleted bowstrings.1.3 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:2D76 Specification for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD204 Test Methods for Sewing ThreadsD1776 Practice for Conditioning and Testing TextilesD1907 Test Method for Linear Density of Yarn(Yarn Num-ber)by the Skein MethodD2256 Test Method for Tensile Properties of Yarns by theSingle-Strand Method3.Terminology3.1 bowstring,ncompleted assembly constructed in partfrom multiple strands of cord material lashed at the center andloop ends with serving string materials and used to connect thelimbs of a bow by which to launch an arrow.3.2 cord material,napplied to a variety of natural ormanmade textile materials.Cord material may be of monocord,twisted,cable,or braided construction.3.3 denier,tex,ndirect yarn numbering systems express-ing size of cord material in terms of mass(weight)of unitlength per 9000 m(9842 yd)for denier or 1000 m(1094 yd)fortex.3.4 diameter,nmeasure of the thickness of the cordmaterial.3.5 EASL,nelongation at a set load.3.6 elongation,namount that a cord material stretchesmeasured as a percentage of the original length either at thepoint of rupture or at some other interval of applied load.3.7 free gage length,nlength of unsupported test speci-men between holding clamps and free from contact with anysnubbing or other sources that could result in nonuniform gagelength measurement.3.8 static load stretch/relaxation,nmeasure of the amounta cord material moves while under static load and with loadsubsequently removed,measured as a percentage of the pre-stressed original length.3.9 standard condition,ncondition reached by cord ma-terial when in moisture equilibrium with a standard atmosphereof a given temperature and relative humidity.3.10 strength,nmaximum force applied to a cord materialcausing it to break.4.Significance and Use4.1 This test method is intended to provide the user of cordmaterials for bowstrings the basic information for evaluationand procurement.4.2 This test method is not meant to be all inclusive sincespecial circumstances may occur that will dictate the use ofnonconforming procedures for evaluation.Special circum-stances and the requirements they establish cannot be antici-pated totally and,therefore,must be considered on an indi-vidual basis.5.Test Methods5.1 Standard ConditionRefer to Practice D1776 for stan-dard condition requirements:7062F2161C!,6562%relative humidity.(1)5.2 Denier,TexRefer to Test Method D1907,Option 1:1This test method is under the jurisdiction of ASTM Committee F08 on SportsEquipment,Playing Surfaces,and Facilities and is the direct responsibility ofSubcommittee F08.16 on Archery Products.Current edition approved Sept.1,2014.Published November 2014.Originallyapproved in 1996.Last previous edition approved in 2010 as F1752 96(2010).DOI:10.1520/F1752-96R14.2For 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 5.2.1 Wind 12yd reeling using 1.5yd perimeter reel.Donot tie reeling ends;rather,cut at overlap of stated yardage.Weigh reeling to the nearest 1 mg.5.2.2 CalculationReport test results as one test specimen/sample and average of three samples:C 3W!/L 51!Denier or2!Tex(2)where:C=(1)9842(denier constant)or(2)1094(tex constant),W=weight of reeled yardage,g,L=length of reeled yardage.5.3 DiameterRefer to Test Methods D204:0.375 6 0.001in.(9.52 6 0.02 mm)anvil,weighted to apply 6 6ozf(1.67 6 0.03 N)5.3.1 Report test results as average of five test specimenssample and average of three samples.5.4 Static Load Stretch/Relaxation:5.4.1 From a lot,select three samples.From each sample,take two test specimens,approximately