ASTM F2842-2011 Standard Specification for Reins Used in Thoroughbred and Quarter Horse Racing《纯种马和夸特马赛马用缰绳的标准规格》.pdf

1、Designation:F284210 Designation: F2842 11An American National StandardStandard Specification forReins Used in Thoroughbred and Quarter Horse Racing1This standard is issued under the fixed designation F2842; the number immediately following the designation indicates the year oforiginal adoption or, i

2、n 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 The specification describes minimum performance criteria and describes test method

3、s for reins for use in thoroughbred andquarter horse racing activities.1.2 Except where noted, the values stated in SI units are to be regarded as the standard. The values given in parentheses arefor information only.1.3 This standard does not purport to address all of the safety concerns, if any, a

4、ssociated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D6775 Test Method for Breaking Strength and Elongation of

5、 Textile Webbing, Tape and Braided MaterialE4 Practices for Force Verification of Testing MachinesE6 Terminology Relating to Methods of Mechanical Testing2.2 Other Standards:3SAE J211 Recommended Practice for Instrumentation for Impact Tests Requirements for Channel Class 10003. Terminology3.1 The t

6、erminology relating to tensile testing in Terminology E6 applies to this specification. In addition, the followingdefinitions will apply:3.2 Definitions:3.2.1 breaking forcethe maximum load at which a tensile failure occurs.3.2.2 connecting hardwareany hardware that connects the rein system componen

7、ts in series or in parallel along which the reinforces will act.3.2.2.1 DiscussionConnecting hardware may include snap hooks, D-rings, loops, links, anchorage hardware, and buckles.3.2.3 gripthe length of rein assembly normally covered with a non-slip material that is intended to be gripped by the r

8、ider.3.2.4 maximum breaking forcea specified value that the breaking force shall not exceed in a prescribed test.3.2.5 minimum breaking forcea specified value that the breaking force must meet or exceed in a prescribed test.3.2.6 primary rein systemany natural or synthetic material or assembly desig

9、ned for the purpose of controlling a horse whileriding or driving.3.2.7 rein system section 1the portion of the rein system defined as the section between the mid-point of the grip and distalloop end of the rein system.3.2.7.1 DiscussionRein system section 1 may or may not include some type of secon

10、dary rein system designed to permit therein system to remain functional should the primary rein system fail between the grip and connecting hardware or loop end of therein.3.2.8 rein system section 2the portion of the rein system defined as the section between the mid-point of the grip of the rightr

11、ein leading away from loop end to the mid-point of the grip of the left rein.3.2.8.1 DiscussionRein system section 2 may include a buckle assembly for connecting two single sections of rein. Rein1This specification is under the jurisdiction of ASTM Committee F08 on Sports Equipment and Facilities an

12、d is the direct responsibility of Subcommittee F08.55 on BodyPadding.Current edition approved June 1, 2010. Published August 2010. DOI:10.1520/F2842-10.Current edition approved Dec. 15, 2011. Published January 2012. Originally approved in 2010. Last previous edition approved in 2010 as F2842 10.DOI:

13、10.1520/F2842-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3Available from SAE International (SAE), 4

14、00 Commonwealth Dr., Warrendale, PA 15096-0001, http:/www.sae.org.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict a

15、ll changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2

16、959, United States.system section 2 shall not include a secondary rein system but may include connecting hardware.3.2.9 secondary rein systemany natural or synthetic material or assembly designed to activate and function after a failure ofthe primary rein system.4. Significance and Use4.1 All test p

17、rocedures described in this specification are to be performed on new rein systems.4.2 This specification is intended to measure the breaking force of the primary rein system and secondary rein system (ifapplicable) as well as the breaking force of rein section 2 when loaded in a tensile testing mach

18、ine.4.3 This specification is not meant to be all inclusive since special circumstances may occur that dictate the use ofnonconforming procedures for evaluation of a rein system. These special circumstances and the requirements they establish cannotbe totally anticipated and therefore must be consid

19、ered on an individual basis.5. Apparatus5.1 Testing MachinesMachines used for tension testing shall conform to the requirements of Practices E4. The loads used inused in determining the breaking force of the reins shall be within the loading range of the tensile machine as defined in PracticesE4.5.2

20、 Gripping Devices:5.2.1 GeneralVarious types of gripping devices may be used to transmit the measured load applied by the testing machineto the test specimens. To ensure axial tensile stress within the gage length, the axis of the test specimen should coincide with thecenter line of the heads of the

21、 machine. Any departure from this requirement may introduce bending stresses that are not includedin the usual stress computation. It is essential that any gripping mechanism, whether it be a winch, wedge grip, or slip drum clamp,not cause any damage or stress concentration in the test material that

22、 might influence the breaking strength. Failure away from thearea of the gripping mechanism is generally sufficient to demonstrate this.5.2.2 Shackle and Eye BoltsA shackle and eye-bolt loop assembly may be used at one end of the testing machine to attachthe loop end of the rein system to the testin

23、g machine. Where the loop end of the rein passes over the shackle or eye bolt, theminimum effective diameter of the bearing surface must exceed 5 mm. The maximum load capacity of the shackle and eye boltmust at least be greater than the 10 kN (2250 lb).5.2.3 Tie Down WinchAtie down winch assembly ma

24、y be used at one of the testing machine to attach the strap or grip sectionof the rein system to the testing machine. The tie down winch assembly shall have sufficient diameter that several revolutions ofstrap section may be wrapped around the winch rod and held in place during tensile loading.5.2.4

25、 Wedge GripsTesting machines usually are equipped with wedge grips. These wedge grips generally furnish asatisfactory means of gripping long specimens of ductile material. If, however, for any reason, one grip of a pair advances fartherthan the other as the grips tighten, an undesirable bending stre

26、ss may be introduced. When liners are used behind the wedges, theymust be of the same thickness and their faces must be flat and parallel. For best results, the wedges should be supported over theentire lengths of the heads of the testing machine. This requires that liners of several thicknesses be

27、available to cover the rangeof specimen thickness. For proper gripping, it is desirable that the entire length of the serrated face of each wedge be in contactwith the specimen. It is essential that the rein system is uniformly gripped when the load is applied.5.2.5 Split Drum ClampsSplit drum type

28、clamping systems that conform to Specification D6775 may be used to clamp therein systems in the testing machine. Ensure that the clamps are positioned such that they are facing opposite of each other in orderto ensure that the applied forces are acting through the rein system and no off-axis loadin

29、g is occurring.5.3 Recording EquipmentThe recording equipment shall meet the following criteria:5.3.1 Force TransducerA load cell or force transducer shall be mounted at the top or bottom of the support assembly in sucha manner that it shall be capable of reporting the magnitude of the axial tensile

30、 force applied to the rein system throughout theentire duration of the testing sequence. The load cell shall be capable of measuring a force of at least 13.3 kN (3000 lb).5.3.2 Force RecordingThe force applied to the rein system shall be recorded using digital data processing that complies withthe r

31、equirements of SAE J211. The minimum sampling rate shall not be less than 100 Hz and the resolution of the data acquisitionsystem shall not be less than 12 bits (including sign).5.3.3 Signal filteringAnalog or digital filtering of the force data channel shall comply with the requirements of SAE J211

32、.6. Performance Requirements6.1 When the rein section 1 samples are tested according to the procedures described in Section 9, the breaking force for theprimary rein system shall be greater than 7.0 kN (1570 lb). If rein section 1 includes a secondary rein system, the breaking forcefor the secondary

33、 rein system shall be greater than 7.0 kN (1570 lb) when tested according to the procedures described in Section, the maximum breaking force for the primary rein system shall be greater than 2.22 kN (500 lb). If the primary rein section breaksat a maximum force of less than 2.22 kN (500 lb), then th

34、e rein shall be considered to fail this performance requirement. Uponbreakage of the primary rein system, a secondary rein system shall be actuated and the maximum breaking force for the secondaryrein system of rein section 1 shall be greater than 2.22 kN (500 lb) when tested according to the proced

35、ures described in Section9.6.2 When the rein section 2 samples are tested according to the procedures described in Section 9, the breaking force shall notexceed 3.3 kN (750 lb).F2842 1127. Sampling and Test Schedule7.1 A total of six complete rein systems as offered for sale shall be required for te

36、sting to this specification. Each rein shall beprepared in accordance with the procedures in 9.1 and tested in accordance with the procedures described in 9.2.7.2 Testing must begin within ten minutes after the test sample is removed from the conditioning environment.8. Conditioning8.1 Three-rein sy

37、stems shall be conditioned for a period of not less than four hours at laboratory conditions which shall be ata temperature of 21 6 3C (70 6 5F) and a relative humidity of 50 6 15 %. Record the temperature to the nearest degree andthe relative humidity to the nearest percent at the time of testing o

38、n the report form for each test series.8.2 Three-rein systems shall be conditioned by fully immersing ina2%chlorhexidine solution at a temperature of 19 6 4C(66 6 7F) and diluted at a ratio of 20:1 (water : disinfectant). Sufficient solution shall be prepared to fully immerse the reinsection. Each r

39、ein section shall be immersed in the disinfectant cleaner solution for a period 60 6 15 s. Prior to testing, the reinsystem shall be removed from the disinfectant cleaner solution and any excess cleaner shall be allowed to drip off the rein systemprior to mounting on the test fixture.8.3 All tests s

40、hall be performed under the conditions described in 8.1.9. Test Methods9.1 Sample Preparation:9.1.1 Prepare the test samples by isolating the bit end of the reins and the mid-point of the rubber grip section of each rein. Thesesamples shall be designated as rein section 1 samples.9.1.1.1 The length

41、of the rein section 1 sample shall be sufficient to include both the primary rein system and the secondary reinsystem (if applicable) and shall not compromise the integrity of either the primary or the secondary system.9.1.2 Prepare an additional set of test samples using the remaining section of re

42、in samples that were not used as rein section1 test samples as prepared in 9.1.1. These samples shall be designated as rein section 2 samples.9.1.2.1 The rein section 2 samples shall be prepared by cutting the section 2 samples at the geometric middle of the reins orseparating the tail ends of the r

43、ein. For most test samples, the location of a buckle assembly represents the geometric middle ofthe reins. If the rein does not have a buckle assembly, measure the total length of the rein system 2 (that is, the complete left andright rein sections after preparation of the rein section 1 samples). H

44、alf of this length represents the geometric middle of themid-rein section.9.2 Sample Testing:9.2.1 Rein Section 1 Sample Testing:9.2.1.1 Place the sample in the testing machine, ensuring that the integrity of the primary and secondary systems is notcompromised as a result of the gripping of the test

45、 sample in the testing machine.9.2.1.2 If the rein system includes a secondary rein system, connect the secondary rein system according to the manufacturersinstructions.9.2.1.3 After the sample is placed in the test machine, complete the zeroing procedure before testing begins. Start applying theloa

46、d to the test sample. The rate of loading shall be 75 6 25 mm/min (3 6 0.1 in/min) when the rate is under the operator control.Apply the load until a failure occurs. This failure will normally be indicated by a substantial reduction from a maximum load anda noise or visual indication that the primar

47、y rein system has broken. The maximum value obtained during this part of the testrepresents the maximum breaking force of the primary rein system of rein section 1.9.2.1.4 If the rein system includes a secondary rein and if the breaking force is less than specified in 6.1 then continue to applythe l

48、oad at a maximum rate of 75 6 25 mm/min until a substantial reduction from the maximum reading occurs a second time.This reduction will normally be accompanied by a noise or visual indication that the secondary rein system has broken. Themaximum value obtained during this part of the test represents

49、 the maximum breaking force of the secondary rein system of reinsection 1.9.2.1.5 Measure the distance from the point of attachment to the rein or grip assembly opposite the loop end to the point offailure. If the rein section 1 failure occurs within a distance equivalent to six times the width of the rein system from the point ofattachment the test shall be discarded and repeated using an alternative gripping methodology. Loop end failures that are adjacentto a shackle or eyebolt are permissible.9.2.2 Rein Section 2 Sample Testing:9.2.2.1 Place the sa