ImageVerifierCode 换一换
格式:PDF , 页数:7 ,大小:314.37KB ,
资源ID:539818      下载积分:5000 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-539818.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM F2961-2014 Standard Test Method for Characterizing Gripping Performance of Gloves Using a Torque Meter《使用扭矩仪描述手套的夹持性能的标准试验方法》.pdf)为本站会员(proposalcash356)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

ASTM F2961-2014 Standard Test Method for Characterizing Gripping Performance of Gloves Using a Torque Meter《使用扭矩仪描述手套的夹持性能的标准试验方法》.pdf

1、Designation: F2961 14Standard Test Method forCharacterizing Gripping Performance of Gloves Using aTorque Meter1This standard is issued under the fixed designation F2961; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l

2、ast 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 is used for evaluating how glovesaffect an individual wearers ability to grip onto a hard surfaceobjec

3、t.1.1.1 This test method establishes procedures for measuringthe maximum torque that can be attained by individuals barehand as compared to the maximum torque that is attained bythe same individual wearing a glove. The torque is applied toa vertically-mounted pole attached to a torque meter.1.2 This

4、 test method is suitable for evaluating gloves andother forms of hand protection that require the wearer tomaintain a secure hold on objects.1.3 This test method does not address all effects of wearinggloves on hand functions. Other test methods include those forevaluating the effect of wearing glov

5、es on dexterity, tactility,and other aspects of functional performance.1.4 It is the responsibility of the test laboratory to obtain thenecessary and appropriate approval(s) required by their insti-tution for conducting tests using human subjects.1.5 The values stated in SI units are to be regarded

6、asstandard. No other units of measurement are included in thisstandard.1.6 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 th

7、e applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1776 Practice for Conditioning and Testing TextilesE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precis

8、ion of a Test MethodF1494 Terminology Relating to Protective Clothing2.2 NFPA Standards:3NFPA 1971 Standard on Protective Ensembles for StructuralFire Fighting and Proximity Fire Fighting3. Terminology3.1 For definitions of other protective clothing-related termsused in this test method, refer to Te

9、rminology F1494.4. Summary of Test Method4.1 The maximum torque applied to a vertically orientedcylindrical rod is measured without gloves and then later whilewearing gloves. The bare hand maximum torque is comparedto the gloved hand maximum torque in terms of a percentage.This percentage is useful

10、in determining if a glove enhances ordecreases an individuals ability to grip a hard object.5. Significance and Use5.1 This test method is intended to provide a quantitativemeasurement of wearing gloves on an individuals ability togrip a solid object.5.2 This method was originally developed to help

11、under-stand how materials and construction of firefighting glovesaffected grip. Methods available at the time showed very littlestatistical difference between a wide range of gloves includingmany NFPA 1971 compliant firefighting gloves and alsonon-compliant gloves used in other applications. This me

12、thodwas shown to have less subject-to-subject variability and agreater range of measured grip than previous tests.45.3 It is possible to apply this test method to other types ofgloves, other than structural firefighting protective gloves.1This test method is under the jurisdiction ofASTM Committee F

13、23 on PersonalProtective Clothing and Equipment and is the direct responsibility of SubcommitteeF23.60 on Human Factors.Current edition approved July 1, 2014. Published August 2014. DOI: 10.1520/F296114.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Ser

14、vice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from National Fire Protection Association (NFPA), 1 BatterymarchPark, Quincy, MA 02169-7471, http:/www.nfpa.org.4Ross, Barker, Watkins, and Deaton,

15、 “Methods for Measuring the Grip Perfor-mance of Structural Firefighting Gloves,” Performance of Protective Clothing andEquipment: Emerging Issues and Technologies,” ASTM STP 1544, Vol 9, A.Shepherd Ed., ASTM International, West Conshohocken, PA, 2012.Copyright ASTM International, 100 Barr Harbor Dr

16、ive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Evaluate the relevance of this test method by examining theparticular application of the gloves for end user grippingcapability. In addition, understand how this test method ranksgloves in comparison with end user perceptions.5.4 This

17、 test method does not discriminate all glove effectson wearer hand function nor does it apply to all glove types andapplications. Consider additional evaluations or tests represen-tative of the glove use applications performed to determine theoverall impact of gloves on wearer hand functions.6. Appa

18、ratus6.1 Testing ApparatusThe device used to characterize thegripping performance of gloves consists of a torque meter withadjustable rod holder and a smooth acrylic cylindrical rod (Fig.1). The rod is secured tightly in the adjustable rod holderattached to the torque meter.6.2 Use a torque meter ca

19、pable of meeting the followingrequirements:6.2.1 Measuring 0 to 10.0 6 0.5 Nm (88.5 6 4.5 lb-in.).6.2.2 Able to be fastened in place or heavy enough to beimmobile during testing.6.2.3 Able to measure torque in either a clockwise orcounter-clockwise direction.6.2.4 Fitting with an adjustable rod hold

20、er fixed to the uppersurface of the meter.6.2.4.1 The rod holder has four metal pins protrudingupwards from the surface. Use 10 mm diameter pins thatprotrude 30 mm from the surface of the holder.(1) Cover the metal pins with a rubber material that isbetween 2.5 and 3.0 mm thick.6.3 Use transparent c

21、ast acrylic rod meeting the followingrequirements:6.4 Measures 600 mm (24 in.) in length and has a diameterof 41.5 mm (1.625 in.).6.4.1 Has a surface roughness value of 0.10 6 0.05 m (4 62 in.) and is free of visual scratches and blemishes.6.4.2 Use an acrylic rod with four grooves cut into thebotto

22、m of the rod. Grooves should match the size of the pinswith rubber covering.6.4.2.1 Fig. 2 shows an example of a rod cut with groovesat the bottom.7. Sampling, Test Specimens, and Test Units7.1 Use a minimum of three glove specimens for testingeach model or type of glove.7.1.1 Use right-handed glove

23、 specimens for right-handdominant test subjects and left-handed glove specimens forleft-hand dominant test subjects.7.1.2 Each glove specimen shall be tested by a differenthuman subject.7.2 Each glove specimen shall be tested in a new, as-distributed, condition.7.2.1 Do not use glove specimens that

24、are treated, broken-in, or conditioned in any manner other than specified in this testmethod prior to their evaluation unless otherwise specified.8. Conditioning8.1 Condition all glove specimens at a temperature of 21 63C (70 6 5F), and a relative humidity of 65 6 5 %, untilequilibrium is reached, a

25、s determined in accordance withPractice D1776 or for at least 24 h.9. Procedure9.1 Use a minimum of three test subjects with similar handsizes.9.1.1 Only use test subjects that obtain a bare hand averagemaximum torque applied value TBgreater than 4.5 Nm butless than 9.0 Nm.9.1.2 Fit the dominant han

26、d of each test subject with a newglove, appropriately sized, in accordance with the manufactur-ers recommendations for the selection and fit of availableglove sizes.9.2 Conduct the test without the test subjects knowledge ofthe torque applied, that is, the test subject shall not be able toFIG. 1 Acr

27、ylic Rod Attached to a Torque MeterF2961 142observe the reading from the torque meter or learn of theapplied torque during any attempt to twist the rod.9.3 No more than five different glove specimens shall betested by the same test subject on the same day to reduce handfatigue.9.4 Conduct a bare han

28、d torque measurement using asubjects dominant hand at the beginning of a testing cycle. Atesting cycle consists of a bare hand measurements followed bygloved hand measurements.9.4.1 If conducting more than one testing cycle subjectsmust wait 15 minutes before conducting the next cycle oftesting. In

29、addition, the glove specimens should be tested in arandom order.9.4.2 Set the torque meter to read a counter-clockwisetorque for right-handed dominant test subjects. Set the torquemeter to read a clockwise torque for left-hand dominant testsubjects.9.4.3 Test subjects stand such that they grab the a

30、crylic rodwith the elbow bent at a right angle and the upper arm againstthe side of the body.9.4.3.1 Adjust the height of the test apparatus to provide thebody and arm orientation described in 9.4.3.9.4.3.2 The subject shall stand with feet parallel, facing thetesting apparatus, and shoulder width a

31、part.9.4.3.3 The subject shall place the non-dominant arm at thebodys side during testing.9.4.3.4 In the correct position, the engaged arm will beparallel to the upright body from the shoulder to the elbow andperpendicular to the ventral plane of the body from the elbowto the wrist. An example can b

32、e seen in Fig. 3.9.4.4 With the bare hand firmly in grasp of the rod, eachsubject will make five successive attempts to twist the rod.Each attempt counts as a repetition.9.4.4.1 Each repetition shall last no longer than 5 s and eachsuccessive repetition shall occur within one minute of theprevious r

33、epetition.9.4.4.2 The test subjects rotation during the repetition shallbe in the wrist rather than in the shoulder. An example of howthe wrist looks before and after the twisting action can be seenin Figs. 4 and 5.9.4.4.3 Record the maximum torque applied after eachrepetition.9.4.4.4 Calculate the

34、average maximum torque applied withthe bare hand over the five attempts and identify it as TB.9.5 Use the same hand for glove specimen testing as usedfor the bare handed tests.9.5.1 Test subjects don glove specimen and stand such thatthey grab the acrylic rod with the elbow bent at a right angleand

35、the upper arm against the side of the body.9.5.1.1 Adjust the height of the test apparatus to provide thebody and arm orientation as described in 9.5.1.9.5.1.2 The subject shall stand with feet parallel, facing thetesting apparatus, and shoulder width apart.9.5.1.3 The subject shall place the non-do

36、minant arm at thebodys side during testing.FIG. 2 Diagram of Rod Cut with Grooves at the BottomF2961 1439.5.1.4 In the correct position, the engaged arm will beparallel to the upright body from the shoulder to the elbow andperpendicular to the ventral plane of the body from the elbowto the wrist. An

37、 example of the correct position can be seen inFig. 3.9.5.2 With the gloved hand firmly in grasp of the rod, eachsubject will make five successive attempts to twist the rod.9.5.2.1 Each repetition shall last no longer than 5 s and eachsuccessive repetition shall occur within one minute of thepreviou

38、s repetition.9.5.2.2 The test subjects rotation during the repetition shallbe in the wrist rather than in the shoulder. An example of howthe wrist looks before and after the twisting action can be seenin Figs. 4 and 5.9.5.2.3 Record the maximum torque applied after eachattempt.9.5.2.4 Calculate the

39、average maximum torque applied withthe gloved hand over the five attempts and identified as TG.10. Calculation10.1 Compare the average maximum torque with a glovedhand with the bare-handed average maximum torque for eachtest subject. Calculate the percentage of bare-handed controlvalue as follows:%

40、BHCV 5TGTB3100 (1)where:%BHCV = percentage of bare-handed control value,TG= average maximum torque applied with glovedhand, andTB= average maximum torque applied with bare hand.10.1.1 Values higher than 100 %BHCV indicate that glovestested enhances the wearers ability to grip a solid object whileval

41、ues lower than 100 % decreases the wearers ability to gripa solid object.10.2 Average the three subjects %BHCV to obtain theoverall %BHCV.11. Report11.1 Record and report the glove size used for testing.11.2 Record and report the %BHCV for each test subject.11.3 Record and report the average %BHCV f

42、or all testsubjects.11.4 Explain any departures from the specified apparatus orprocedure.12. Precision and Bias12.1 The precision of this test method is based on anintralaboratory study of ASTM WK33658, New Standard TestMethod for Characterizing Gripping Performance of GlovesFIG. 3 Example of a Corr

43、ect Testing PositionF2961 144Using a Torque Meter, conducted in 2013. A single laboratoryparticipated in this study, testing three types of gloves. Every“test result” represents an individual determination. The labo-ratory reported four replicate test results for each glove type.Except for the use o

44、f only one laboratory, Practice E691 wasfollowed for the design and analysis of the data; the details aregiven in ASTM Research Report No. F23-1010.512.1.1 Repeatability (r)The difference between repetitiveresults obtained by the same operator in a given laboratoryapplying the same test method with

45、the same apparatus underconstant operating conditions on identical test material withinshort intervals of time would in the long run, in the normal andcorrect operation of the test method, exceed the followingvalues only in one case in 20.12.1.1.1 Repeatability can be interpreted as maximum dif-fere

46、nce between two results, obtained under repeatabilityconditions that are accepted as plausible due to random causesunder normal and correct operation of the test method.12.1.1.2 Repeatability limits are listed in Table 1 below.12.1.2 Reproducibility (R)The difference between twosingle and independen

47、t results obtained by different operatorsapplying the same test method in different laboratories usingdifferent apparatus on identical test material would, in the longrun, in the normal and correct operation of the test method,exceed the following values only in one case in 20.12.1.2.1 Reproducibili

48、ty can be interpreted as maximumdifference between two results, obtained under reproducibilityconditions that are accepted as plausible due to random causesunder normal and correct operation of the test method.12.1.2.2 Reproducibility limits cannot be calculated from asingle laboratorys results.5Sup

49、porting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:F23-1010. ContactASTM CustomerService at serviceastm.org.FIG. 4 Example of Wrist Before TwistingF2961 14512.1.3 The above terms (repeatability and reproducibilitylimit) are used as specified in Practice E177.12.1.4 Any judgment in accordance with 12.1.1 wouldnormally have an approximate 95 % probability of beingcorrect; however, the precision statistics obtained in this ILSmust not be treated as exact mathematical quantities which areapp

copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1