1、Designation: F2031 05 (Reapproved 2014) An American National StandardStandard Test Method forMeasurement of Arrow Shaft Static Spine (Stiffness)1This standard is issued under the fixed designation F2031; the number immediately following the designation indicates the year oforiginal adoption or, in t
2、he 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 formulation and designationof arrow spine measurement sta
3、ndards and nomenclature forarrow shafts.1.2 The English system of measurement, specifically inchesof deflection, shall be used for all spine values expressed for agiven arrow shaft.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresp
4、onsibility 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. Terminology2.1 Definitions of Terms Specific to This Standard:2.1.1 arrow spinethe deflection of the shaft, measured ininches, in a
5、 three-point load scenario where a specified mass isapplied to the midpoint of the arrow shaft supported at a fixedspan.2.1.2 spine around shaft variationspine variation betweenfour readings taken at 90 spacing around the shaft.2.1.3 static spinestiffness of the arrow shaft at rest on aspine measure
6、ment device.3. Significance and Use3.1 This test method is intended to provide a stable industrystandard by which benchmarks and comparisons can be madeby manufacturers and consumers.3.2 This test method is intended to clarify and define arrowspine or stiffness as it pertains to the archery industry
7、 and sport.4. Measurement Guidelines for Arrow Spine4.1 Arrow Spine MeasurementThe most prevalent andcommonly accepted method of measuring arrow shaft spineinvolves supporting the arrow shaft along a known, fixed span,and using an indicator device while the arrow shaft is deflectedwith a known weigh
8、t depending from or pressing upon thearrow shaft at the exact center between the supports for theshaft. For this test method, a span type measurement is to beused. The length of the arrow shaft to be tested, the spandistance to be used, and the equipment to be used are definedas follows:4.1.1 Shaft
9、Length The shaft length to be used forstandard spine measurement is the span distance plus 1 in. toallow for axial travel during deflection.4.1.2 Span Distance The length of the span to be used forthis test is 28 in. (71.1 cm). For those shafts that aremanufactured less than 29 in. (73.7 cm) in leng
10、th, the spandistance to be used is 23 in. (58.4 cm).4.1.2.1 Span = 28 in. (71.1 cm) for shafts longer than 29 in.(73.7 cm).4.1.2.2 Span = 23 in. (58.4 cm) for shafts shorter than 29 in.(73.7 cm).4.1.2.3 Approximate conversion formula to convert a spineat 23 in. (58.4 cm) span to a 28 in. (71.1 cm) s
11、pan:283in.371.13cm3! 5 1.804233in.358.43cm3!or 23 in. (58.4 cm) spine 1.804 = 28 in. (71.1 cm) spine4.1.3 Measurement LocationArrow shafts shall be mea-sured for spine at the center of the span. In instances where thisis not practical due to shaft design, the manufacturer shalldisclose the measureme
12、nt location(s) from an identifiabledatum on the shaft.4.1.4 Measurement EquipmentMeasurement equipmentmay involve the use of dial indicators, probe indicators, andlaser gauging devices.4.1.4.1 Mechanical IndicatorsIn the case of mechanicalindicators, probe pressure should be limited to no more than0
13、.176 oz (5 g).4.1.4.2 Noncontact Gauging EquipmentNoncontact gaug-ing equipment, such as laser gauging equipment, shall read towithin 0.001 in. of mechanical contact measurement equipmentconforming to the test methods and specifications outlinedherein.4.1.5 Span Support PointsSupport points shall al
14、low freeaxial travel of the shaft as the shaft is deflected duringmeasurement.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 Sep
15、t. 1, 2014. Published November 2014. Originallyapproved in 2000. Last previous edition approved in 2010 as F2031 05 (2010).DOI: 10.1520/F2031-05R14.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.5.1 Span Support Point Configurati
16、onThe shaft sup-port point shall have a maximum diameter of 0.125 in. (3.175mm) at the point of contact with the arrow shaft.4.1.6 Test Description The arrow shaft shall be deflectedby a 1.94 lb (880 g) weight at the center of the span. Theweight may depend from or rest upon the shaft. The differenc
17、ebetween the position of a given datum at the center of the shaftand the position of the same datum during deflection shall bethe shaft spine value. The reading shall be taken within 30 s toprevent plastic deformation of the shaft material from affectingthe readings.4.2 Measurement AccuracyThe accur
18、acy and span toler-ance of the equipment and setup shall have a measuredaccuracy of at least 60.002 in. (0.05 mm).5. Industry Guidelines for Specification Disclosure5.1 The term standard spine may be used in instances wherea reading is taken in accordance with this test method.5.2 Spine readings sha
19、ll be taken within a standard tempera-ture range of 65 to 75F (18 to 24C). Because humidity is nota factor in arrow shaft measurement a relative humidity rangeof 5 to 85 % is permissible.5.3 The shaft span for which the reading has been takenshall be clearly defined in English units, specifically in
20、ches (forexample, 0.470 in. arrow shaft spine 28 in. span).5.4 Spine variation around the arrow shaft may be expressedas standard spine around shaft variation (x) where x is avalue, in inches of the total spine variation, derived from fourspine readings taken at locations evenly spaced 90 around the
21、shaft.5.5 In instances where a manufacturer wishes to specify aplus/minus reading, this should be indicated as distinct fromstandard spine (for example, 60.001 in.)6. Precision and Bias6.1 It is not practical to specify the precision of theprocedure of this test method because it has not yet beendet
22、ermined.6.2 The procedure described in this test method has no biasbecause the spine of an arrow shaft is defined only asprescribed in this test method.7. Keywords7.1 archery; arrow shafts; spine; static spine; total indicatorreadingASTM International takes no position respecting the validity of any
23、 patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revi
24、sion at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your
25、comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyri
26、ghted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 05 (2014)2
