1、Designation:F164895(Reapproved 2013)An American National StandardStandard Test Methods forArchery Bowstring ComponentServing String Material1This standard is issued under the fixed designation F1648;the number immediately following the designation indicates the year oforiginal adoption or,in the cas
2、e 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 These test methods cover the classification and testingof serving string as a component material
3、used in the fashion-ing of archery bowstrings.1.2 These test methods are not intended to provide informa-tion beyond any evaluation of the serving string material thatwould determine its fitness for use other than in the fabricationof the completed bowstring.1.3 This standard does not purport to add
4、ress 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
5、 for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD204 Test Methods for Sewing ThreadsD1776 Practice for Conditioning and Testing TextilesD2256 Test Method for Tensile Properties of Yarns by theSingle-Strand Method3.Terminology3.1 Definitions:3.1.1 bowstringcompleted ass
6、embly constructed in partfrom multiple strands of cord materials lashed at the center orthe loop ends with serving string materials and used to connectthe limbs of a bow by which to launch an arrow.3.1.2 diametera measure of the thickness of the servingstring material.3.1.3 elongationthe amount that
7、 a serving string materialstretches;measured as a percentage of the original length eitherat the point of rupture or at some other interval of applied load.3.1.4 serving stringapplied to a variety of natural orman-made textile materials,serving string material may be ofmonocord,twisted,cable,braided
8、,or monofilament construc-tion.3.1.5 standard conditiona condition reached by materialwhen in moisture equilibrium with a standard atmosphere of agiven temperature and relative humidity.3.1.6 strengththe maximum force applied to a servingstring material causing it to break.4.Significance and Use4.1
9、These test methods are intended to provide basic infor-mation for evaluation and procurement for the user of servingstring materials for bowstrings.4.2 These test methods are not meant to be all inclusivesince special circumstances may occur that dictate the use ofnonconforming procedures for evalua
10、tion.These special cir-cumstances and the requirements they establish cannot betotally anticipated and therefore must be considered on anindividual basis.5.Test Methods5.1 Refer to Practice D1776 for standard condition require-ments.5.1.1 Standard Conditions70 6 2F(21 6 1C),65 62%relative humidity.5
11、.2 Refer to Test Method D2256 for strength and elongationrequirements.5.2.1 Set CRE-type testing machine at 12 6 0.5-in.(305 610-mm)/min draw rate with gage length as follows:5.2.1.1 10 6 0.1 in.(250 6 3 mm)from nip for pneumaticflat-faced clamps,or5.2.1.2 5 6 0.1-in.(125 6 3-mm)free gage length for
12、capstan-type clamps.5.2.1.3 Report test results as the average of five test speci-mens per sample and the average of three test samples.5.2.2 Elongation tests using capstan clamps are measured at80%of test specimen average breaking load using 100-mmindex marks arbitrarily marked along the 5-in.free
13、gage lengthdue to possible stretching of the test specimen around thecapstans.Arbitrarily mark 100-mm index marks along the 5-in.free gage length of the mounted test specimen,and measure thechange in length of index marks after applying load to the test1These test methods are under the jurisdiction
14、of ASTM Committee F08 onSports Equipment,Playing Surfaces,and Facilities and are the direct responsibilityof Subcommittee F08.16 on Archery Products.Current edition approved May 1,2013.Published August 2013.Originallyapproved in 1995.Last previous edition approved in 2008 as F1648 95(2008).DOI:10.15
15、20/F1648-95R13.2For 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,
16、PO Box C700,West Conshohocken,PA 19428-2959.United States1 specimen equal to 80%of test specimen average breakingload.Report test results entitled as EASL 80%as the averageof five test specimens per sample and the average of three testsamples.5.3 Refer to Test Methods D204 for diameter requirements.5.3.1 Diameter0.375 6 0.001-in.(9.52 6 0.02-mm)anvilweighted to apply 6 6 0.1 ozf(1.67 6 0.03 N).Report the testresults as the average of five test specimens and the average ofthree test samples.6.Key