ANSI ASTM F2650-2017 Standard Terminology Relating to Impact Testing of Sports Surfaces and Equipment.pdf

上传人:appealoxygen216 文档编号:433157 上传时间:2018-11-11 格式:PDF 页数:2 大小:56.04KB
下载 相关 举报
ANSI ASTM F2650-2017 Standard Terminology Relating to Impact Testing of Sports Surfaces and Equipment.pdf_第1页
第1页 / 共2页
ANSI ASTM F2650-2017 Standard Terminology Relating to Impact Testing of Sports Surfaces and Equipment.pdf_第2页
第2页 / 共2页
亲,该文档总共2页,全部预览完了,如果喜欢就下载吧!
资源描述

1、Designation: F2650 171An American National StandardStandard Terminology Relating toImpact Testing of Sports Surfaces and Equipment1This standard is issued under the fixed designation F2650; the number immediately following the designation indicates the year oforiginal adoption or, in the case of rev

2、ision, 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.1NOTEEditorially corrected standard gravity in November 2017.1. Scope1.1 This terminology covers terms related

3、to impact testmethods and impact attenuation specifications of sports equip-ment and surfaces.1.2 This terminology is appropriate for use in the develop-ment of standards that describe gravity-driven impact testmethods or specify impact attenuation performance criteria andwhich fall under the jurisd

4、iction of ASTM Committee F08 onSports Equipment and Facilities.1.3 This terminology defines common terms that are appli-cable to many sports-related impact tests including those usedin the context of sports surfaces, athletic footwear, protectiveequipment and padding. The use of a common terminology

5、will promote greater consistency among standards and reducethe risk of misinterpretation.1.4 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.5 This international standard was developed in accor-dance with internationally reco

6、gnized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Terminology2.1 Definitions:acceleration, nrate of change of

7、velocity with time.DISCUSSIONAcceleration is a vector quantity, having both magni-tude and direction. Acceleration magnitude is expressed in units ofm/s2(ft/s2) and direction is defined relative to a Cartesian coordinatesystem or other spatial reference frame.assisted impact test, nan impact test in

8、 which the missile isaccelerated by means other than gravity alone, for example,by an actuator.drop height (h), nheight from which a missile is droppedduring a gravity-driven impact test, measured as the verticaldistance between the lowest point of the elevated missile andits first point of contact

9、with the impacted surface or anvil.theoretical drop height, ndrop height (h) that, understandard conditions, would result in an impact velocity equal toa missiles measured impact velocity (V0).DISCUSSIONThe “standard conditions” assume standard gravity andthat friction and air resistance do not affe

10、ct the fall of the missile. In afree-fall impact test the actual drop height will approximate thetheoretical drop height. In a guided impact test, the theoretical dropheight will be less than the actual drop height, due to the effects offriction in the guidance mechanism.g, n(pronounced “gee”) a uni

11、t of acceleration equal tostandard gravity. Missile accelerations expressed in g unitsare the ratio of the missile acceleration to standard gravityand are hence dimensionless.DISCUSSIONThe symbol g is properly written in lowercase anditalic, to distinguish it from the symbol G (uppercase, used to in

12、dicatethe gravitational constant) and g (not italicized) which is an abbrevia-tion of the gram unit.g-max, nmaximum acceleration magnitude recorded duringa single impact, expressed in g units.average g-max, narithmetic average of a specified set ofg-max values.gravity-driven impact test, nan impact

13、test in which themissile is accelerated by gravity alone, during a period offree-fall.head injury criterion (HIC), nweighted impulse criterioncalculated from a head impact acceleration-time profile andused to quantify head impact severity. The HIC calculationresults in a severity index that is weigh

14、ted by both impactacceleration magnitude and by the time for which highmagnitude accelerations persist.DISCUSSIONHIC scores can only be directly referenced to the headinjury risk data on which the criterion is based if the impactacceleration-time profile is recorded using a human head or a biofideli

15、c1This terminology is under the jurisdiction of ASTM Committee F08 on SportsEquipment, Playing Surfaces, and Facilities and is the direct responsibility ofSubcommittee F08.80 on Common Terminology, Methods and Laboratory Prac-tices.Current edition approved Sept. 15, 2017. Published October 2017. Ori

16、ginallyapproved in 2007. Last previous edition approved in 2013 as F2650 13. DOI:10.1520/F2650-17E01.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognize

17、d principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1headform. HIC scores determined using rigid missiles and headformste

18、nd to over estimate head injury risk.headform, nmissile with mass and geometry approximatingthose of the human head.biofidelic headform, nheadform with elastic propertiesapproximating those of the human head.rigid headform, nheadform fabricated from very stiffmaterials (for example, steel or aluminu

19、m) such that itsdeformation during an impact is negligible.impact attenuation, nreduction of loads produced in thecourse of an impact by means of a cushioning system ordevice, relative to a load criterion or to the loads producedby a reference system.DISCUSSIONLoad measures used to quantify impact m

20、agnitudeinclude force, acceleration, stress and pressure and their time deriva-tives.impact energy, nthe kinetic energy of a missile at the instantof initial contact with the target.DISCUSSIONIn a gravity-driven test, impact energy is equal to thepotential energy of the missile at the theoretical dr

21、op height. See alsototal energy input.impact test, na mechanical test in which an instrumentedmissile impacts a target.DISCUSSIONThe outcomes of the impact are measured and used tocharacterize the impact attenuation of the target under initial conditionsimposed by the test method.missile, nin a grav

22、ity-driven impact test, the object mass thatfalls under gravity to produce an impact.reference plane, nplane parallel to the surface or normal tothe path of the missile and from which missile displacementis measured.rigid surface, na reference surface (for example, a concretesurface covered by a ste

23、el plate) used as the basis formeasuring force reduction.shock absorption, nsee shock attenuation.shock attenuation, nimpact attenuation where the measureof load is the peak magnitude of acceleration produced by animpact. (See impact attenuation.)sprung-mass impact test, nan impact test in which aca

24、librated linear spring is interposed between the missile andthe target.DISCUSSIONThe spring limits the maximum impact force or accel-eration produced by an impact on a stiff or rigid surface to a valuedetermined by the stiffness of the spring.standard gravity, nnominal value of the acceleration due

25、togravity at sea level having an international standard value ofexactly 9.80665 m/s2(approximately 32.174 ft/s2).time to g-max, nelapsed time from the onset of impact untilthe time at which g-max occurs.DISCUSSIONDepending on the application, the “onset of impact”may be defined as the time at which

26、the missile intersects a zeroreference plane or as the time at which a measured deceleration of themissile exceeds a small threshold value.total energy input, nthe total energy transferred to thetarget, up to the point of maximum target displacement, thesum of the impact energy and the additional po

27、tential energytransferred during target displacement.3. Keywords3.1 athletic equipment; athletic field; impact; impact testing;playground equipment; playground surfaces; sports; sportsequipment; sports field; sports surfacesASTM International takes no position respecting the validity of any patent r

28、ights 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 revision at a

29、ny 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 comments

30、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 copyrighted by

31、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:/ 1712

展开阅读全文
相关资源
  • ANSI Z97 1-2009 American National Standard for Safety Glazing Materials used in Buildings - Safety Performance Specifications and Methods of Test《建筑物中窗用玻璃材料安全性用.pdfANSI Z97 1-2009 American National Standard for Safety Glazing Materials used in Buildings - Safety Performance Specifications and Methods of Test《建筑物中窗用玻璃材料安全性用.pdf
  • ANSI Z97 1 ERTA-2010 Re ANSI Z97 1 - 2009 Errata《修订版 美国国家标准学会Z97 1-2009标准的勘误表》.pdfANSI Z97 1 ERTA-2010 Re ANSI Z97 1 - 2009 Errata《修订版 美国国家标准学会Z97 1-2009标准的勘误表》.pdf
  • ANSI Z21 40 2a-1997 Gas-Fired Work Activated Air-Conditioning and Heat Pump Appliances (Same as CGA 2 92a)《燃气、工作激活空气调节和热泵器具(同 CGA 2 92a)》.pdfANSI Z21 40 2a-1997 Gas-Fired Work Activated Air-Conditioning and Heat Pump Appliances (Same as CGA 2 92a)《燃气、工作激活空气调节和热泵器具(同 CGA 2 92a)》.pdf
  • ANSI Z124 9-2004 American National Standard for Plastic Urinal Fixtures《塑料小便器用美国国家标准》.pdfANSI Z124 9-2004 American National Standard for Plastic Urinal Fixtures《塑料小便器用美国国家标准》.pdf
  • ANSI Z124 4-2006 American National Standard for Plastic Water Closet Bowls and Tanks《塑料抽水马桶和水箱用美国国家标准》.pdfANSI Z124 4-2006 American National Standard for Plastic Water Closet Bowls and Tanks《塑料抽水马桶和水箱用美国国家标准》.pdf
  • ANSI Z124 3-2005 American National Standard for Plastic Lavatories《塑料洗脸盆用美国国家标准》.pdfANSI Z124 3-2005 American National Standard for Plastic Lavatories《塑料洗脸盆用美国国家标准》.pdf
  • ANSI T1 659-1996 Telecommunications - Mobility Management Application Protocol (MMAP) RCF-RACF Operations《电信 可移动管理应用协议(MMAP) RCF-RACF操作》.pdfANSI T1 659-1996 Telecommunications - Mobility Management Application Protocol (MMAP) RCF-RACF Operations《电信 可移动管理应用协议(MMAP) RCF-RACF操作》.pdf
  • ANSI T1 651-1996 Telecommunications – Mobility Management Application Protocol (MMAP)《电信 可移动性管理应用协议》.pdfANSI T1 651-1996 Telecommunications – Mobility Management Application Protocol (MMAP)《电信 可移动性管理应用协议》.pdf
  • ANSI T1 609-1999 Interworking between the ISDN User-Network Interface Protocol and the Signalling System Number 7 ISDN User Part《电信 ISDN用户间网络接口协议和7号信令系统ISDN用户部分.pdfANSI T1 609-1999 Interworking between the ISDN User-Network Interface Protocol and the Signalling System Number 7 ISDN User Part《电信 ISDN用户间网络接口协议和7号信令系统ISDN用户部分.pdf
  • ANSI T1 605-1991 Integrated Services Digital Network (ISDN) - Basic Access Interface for S and T Reference Points (Layer 1 Specification)《综合服务数字网络(ISDN) S和T基准点的.pdfANSI T1 605-1991 Integrated Services Digital Network (ISDN) - Basic Access Interface for S and T Reference Points (Layer 1 Specification)《综合服务数字网络(ISDN) S和T基准点的.pdf
  • 猜你喜欢
    相关搜索

    当前位置:首页 > 标准规范 > 国际标准 > ANSI

    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