ASTM F504-2005(2012) Standard Test Method for Measuring the Quasi-Static Release Moments of Alpine Ski Bindings 《测量高山滑雪板绑带的准静态脱扣力矩的标准试验方法》.pdf

《ASTM F504-2005(2012) Standard Test Method for Measuring the Quasi-Static Release Moments of Alpine Ski Bindings 《测量高山滑雪板绑带的准静态脱扣力矩的标准试验方法》.pdf》由会员分享，可在线阅读，更多相关《ASTM F504-2005(2012) Standard Test Method for Measuring the Quasi-Static Release Moments of Alpine Ski Bindings 《测量高山滑雪板绑带的准静态脱扣力矩的标准试验方法》.pdf（12页珍藏版）》请在麦多课文档分享上搜索。

1、Designation: F504 05 (Reapproved 2012)Standard Test Method forMeasuring the Quasi-Static Release Moments of Alpine SkiBindings1This standard is issued under the fixed designation F504; the number immediately following the designation indicates the year of originaladoption or, in the case of revision

2、, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a procedure for the measure-ment of release moments of ski bindings under conditions

3、where inertia loadings of the ski binding system are notsignificant.1.2 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 the a

4、pplica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2F498 Test Method for Center Spring Constant and SpringConstant Balance of Alpine SkisF779 Test Method for Torsion Characteristic of Alpine SkisF944 Specification for Properties of Adult Alpine SkiBoots32.

5、2 ISO Standard:4ISO 9838 Alpine Ski BindingsTest Soles for Ski BindingTestsISO 9462 Alpine Ski BindingsSafety Requirements andTest MethodsISO 9465 Alpine Ski BindingsLateral Release under Im-pact Loading-Test Method3. Terminology3.1 The following terminology is introduced with referenceto the sketch

6、 of the boot-ski system shown in Fig. 1.3.1.1 Six points of load application to the standard test skiare required. With the adult boot sole (300 mm in length) themost forward point, located at a position 90 6 0.5 cm from thecenterline of the test shaft, shall be called the “forward point”and shall b

7、e designated as F. The second point, 45 6 0.5 cm infront of the centerline of the test shaft, shall be designated the“near point,” N. The third point, located 45 6 0.5 cm behindthe centerline of the test shaft, shall be designated “rear point,”R. The fourth point, located 35 6 0.5 cm in front of the

8、 centerline of the test shaft, shall be designated the “near preloadpoint,” NP. The fifth point, located 75 6 0.5 cm behind thecenterline of the test shaft shall be designated the “far rearpoint,” FRP.The sixth point, the “alternate near preload point,”ANP, is located 7.5 6 0.25 cm, in the minus y-d

9、irection fromthe point NP. For sole lengths longer than 300 mm the F andFR points are not changed from the location used for the 300mm boot sole. For sole lengths shorter than 300 mm the N, R,ANP and NP points are not changed from the location used forthe 300 mm sole. For bindings which are to be us

10、ed exclusivelywith skis shorter than the test ski, F and FR tests shall beperformed at the N and R points. If the ski is too short for thespecified N and R points, N and R shall be moved closer to thez-axis by 10 cm each, and all tests performed using the new Nand R points. The forces that are appli

11、ed to the standard ski atthese six designated points may now be described by simplevector notation. A laboratory-fixed axis designation shall beused with the numeral z denoting the vertical axis normal to the1This test method is under the jurisdiction of ASTM Committee F27 on SnowSkiing and is the d

12、irect responsibility of Subcommittee F27.10 on Binding TestProcedures.Current edition approved June 1, 2012. Published July 2012. Originally approvedin 1977. Last previous edition approved in 2005 as F504 05. DOI: 10.1520/F0504-05R12.2For referenced ASTM standards, visit the ASTM website, www.astm.o

13、rg, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.4Available from American Nationa

14、l Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.FIG. 1 Load Application1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.top face of the ski (in the region of the test shaft) and positivein the direction outw

15、ard from the ski; the numeral x denotingthe longitudinal axis, positive in the forward direction of theski; and the numeral y denoting the lateral axis, the positivedirection of which is determined by the right-hand rule. Thez-axis is coincident with the centerline of the test shaft. Theorigin of th

16、e XYZ coordinate system is a point 230 mm alongthe axis of the test shaft from the bearing surface of the test solefor 300 mm test soles. The location is changed proportionallyfor soles other than 300 mm. The direction of any force appliedto the ski is defined by its unit vector. The magnitude of ap

17、reload force applied to the ski is defined by the Mzor Mymoment created by the force.4. Summary of Test Method4.1 The ski binding is mounted on a standard ski and astandard boot sole is inserted into the binding.Arelatively stifftest shaft instrumented for moments is affixed to the sole andattached

18、rigidly to the test frame. The apparatus is shown inFig. 2.4.2 Loads sufficient to produce binding release are appliedto the binding by forcing the ski to displace relative to theframe until release occurs. The components of the momentstransmitted through the binding to the test shaft are recorded.T

19、hese records are interpreted to provide the static releasemoments of the binding.5. Significance and Use5.1 This test method involves simulation in the laboratory ofpotential injury-producing loads that can occur in skiing,without implying the frequency or the magnitude of the danger.This test metho

20、d does not include the simulation of all or partof a skier, and care must be taken not to confuse the values ofmoments measured by the test shaft with the loads subjected tothe tibia of a skier under the same conditions.6. Apparatus6.1 Ski:6.1.1 SkiThree test skis are defined in Table 1 ofISO 9462.

21、The mounting platform shall be as specified in therelevant ASTM standard. The boots ski location marker asshown on Specification F944 or ISO 9838 shall be aligned withthe boot centerline marker on the ski. If there are no markers onthe boot or ski the center of the boot sole shall be located 15 60.5

22、 cm behind the center of the skis projected length unless therelevant ASTM standard applies.6.2 BootFour test soles are defined in Table 2 ofISO 9462. The standard adult sole shall be 30 6 0.5 cm inlength and shall be adjustable, over a range of 64 cm. It shallbe constructed to meet the requirements

23、 of ISO 9838. Detailsconcerning boot characteristics shall conform to the relevantASTM standard. However, it shall be permissible to modify theboot if the binding manufacturer specifies that modification isnecessary for proper function of the binding.6.3 StiffenerWhen a ski stiffener is called for (

24、see AnnexA1 andAnnexA2), a channel of dimensions 75 to 80 mm wideby 35 to 40 mm high by 4 to 5 mm thick shall be used to stiffenthe ski between the near and rear points. The channel shall bemade of 6061 T6 aluminum, or equivalent. The bar shall beattached to the ski by bolts, screws, or clamps at N

25、and R pointsand at a point half way between N and R points. The stiffenerdescribed in Fig. A1.1 meets this requirement.6.4 Test Frame:6.4.1 The test frame consists of all mechanical componentsthat connect the boot to a stationary reference, including theboot sole attachment, the test shaft, and the

26、supporting struc-ture for the test shaft. The test frame shall include a boot soleattachment constructed in accordance with ISO 9838 for thestandard sole.6.4.2 The angle between the bottom of the boot sole and thetest shaft shall be 90 6 1 in the zx and zy planes; thepositions of centerline of the t

27、est shaft relative to the boot shallbe at a longitudinal location 20 6 1 cm from the front of theboot sole when the 300-mm boot sole is used. For other bootsole lengths the distance shall be two thirds the distance fromthe front of the sole.6.4.3 The test shaft and associated instrumentation shall b

28、ecapable of measuring moments about the x-, y-, and z-axes asrequired. Further specifications for the test shaft as part of theinstrumentation system are discussed in 6.6.6.4.4 The linear compliance of all combined mechanicalcomponents of the test frame shall be no more than 4 3 106m/N in either of

29、the x or y directions, and no more than4 3 107m/N in the z direction for loads applied at theintersection of the test shaft and the attachment plate. Theangular compliance shall be no more than 5 3 105rad/N mfor rotations around the x, y,orz-axes.NOTE 1When an associated high-speed test series is es

30、tablished, theangular compliance shall be no more than 2.5 3 105rad/Nmforrotations around the x-, y-, or z-axes.6.5 Cable:6.5.1 The minimum length of cable between the point ofattachment to the ski and the nearest support shall be 1 m.6.5.2 The cable shall be attached to the ski such that theresulta

31、nt force transmitted through the cable passes within 1cm of the centeroid of the cross section of the ski.6.5.3 Preloads are applied through a pulley near the base ofthe load cell pedestal with an attachment swivel not more than12 cm offset from the load cell axis. A spring with a springFIG. 2 Test

32、EquipmentF504 05 (2012)2constant of 65 N/cm (610 %) and an unloaded length of atleast 20 cm is attached between the preload cable and theattachment fixture. When a preload (PL) is used in a test thepreload cable force will induce a moment Mythat is a specifiedpercentage of the nominal release moment

33、 in test 2.1 (see Fig.11).6.5.4 Release in tests 1.1, 2.2, and 2.2 (Fig. 3, Fig. 11, andFig. 12) is accomplished by a single cable connecting points Nand R that is loaded by a traveller pulley of a design capable ofapplying loads at N and R that are opposite in direction andequal in magnitude to wit

34、hin 5 % of each other.NOTE 2Preloads (PL) given in Figs. 7-10 are examples of Mypreloadmoments that may be specified.6.6 Instrumentation:6.6.1 MeasurementsThe instrumentation shall providemeasurement of the peak Mzand Mymoments. The values ofmeasured moments are referred to a point 23 6 0.1 cm above

35、the bearing surface of the boot sole on the z-axis for 300-mmsole lengths. Other length soles shall require this referencepoint to be shifted proportionally.6.6.2 RangeMaximum moment along a single axis:300 N mfull2scale for MzMx! (1)1000 N mfull2scale for My!6.6.3 AccuracyAbsolute accuracy for mome

36、nt measure-ments to errors less than 62 % of reading for readings above50 Nm and less than 61 Nm for readings 50 Nm or less.6.6.4 RepeatabilityRepeated readings under standard testconditions shall be repeatable to 61.5 % for moment readingsabove 50 N m. Repeatability shall be to 60.75 Nm for lowerre

37、adings.6.6.5 HysteresisThe hysteresis measured at no load shallbe less than 1.5-N m moment following a cyclical load to fullscale.6.6.6 Null Drift shall be correctable to less than 0.75-N mmoment at 20C.6.6.7 Temperature Sensitivity:Gain variations: correctable to 0.2 % C at (2)To6 0.5CNull variatio

38、ns: correctable to 0.5 N m/C at (3)To6 0.5Cwhere: To= equilibrium environmental temperature and is inthe range from 20 to +20C.6.6.8 Frequency ResponseGain measured at full scaleshall vary less than 1 dB over the bandwidth 0 to 100 Hz. Phaselag shall be less than 10 over the same bandwidth.6.7 Load

39、Application:6.7.1 Locations and Directions of ApplicationThe appa-ratus shall have the capability of applying the load configura-tions in accordance with Figs. 3-15. Tests in Category 1 haveFIG. 3 Test 1.1FIG. 4 Test 1.3FIG. 5 Test 1.4FIG. 6 Test 1.5F504 05 (2012)3a significant Mzcomponent; tests in

40、 Category 2 have asignificant Mycomponent. Note that the unit vector is given forall loads applied through the cable system. The unit vector fora release load is shown as a solid line while the unit vector fora preload is shown as a dashed line. Preloads (PL) are given interms of the nominal value o

41、f test 2.1 (see Fig. 11).6.7.1.1 Release load and preload cables shall be adjustableto within 2 of the orientation of the unit vector specified inFigs. 3-15 as measured under a cable tension equivalent toapproximately 10 % of the nominal release load in tests 1.1 or2.1 as appropriate.6.7.2 Rates of

42、ApplicationThe apparatus shall have theability of applying loads such that the linear speed of the cablePL = .75 3 2.1FIG. 7 Test 1.6PL = .50 3 2.1FIG. 8 Test 1.8PL = .50 3 2.1FIG. 9 Test 1.10PL = .75 3 2.1FIG. 10 Test 1.11FIG. 11 Test 2.1FIG. 12 Test 2.2F504 05 (2012)4at the point of attachment to

43、the ski shall be adjustable to twodifferent rates as follows: 2 6 0.5 cm/s and 60 6 10 cm/s.6.7.3 CalibrationThe load cell is calibrated using thefixture and procedures defined in Annex A.6.7.4 ZeroingThe instrumentation is zeroed without theski attached to the test sole.7. Test Specimen Preparation

44、7.1 Bindings should be mounted in accordance with themanufacturers specifications, and boot surfaces and interfacesshall be cleaned with an appropriate cleaner, unless otherwisespecified by environmental test procedures. All tests shall beFIG. 13 Test 2.3FIG. 14 Test 2.5FIG. 15 Test 2.8F504 05 (2012

45、)5performed with boot-binding contact points wet by a mist ofdistilled water unless otherwise specified by environmentalprocedures.8. Procedure8.1 An individual release measurement shall consist ofattaching a ski-binding system to the test apparatus andapplying a load configuration, as specified in

46、6.7.1 and 6.7.2,sufficient to cause the binding mechanism to release whilesimultaneously recording information sufficient to determinethe two peak Mzand Mymoments. Refer to Annex A2 forstep-by-step procedures.9. Keywords9.1 alpine ski binding; release binding; release envelope;release momentANNEXES(

47、Mandatory Information)A1. FIXTURESA1.1 ScopeA1.1.1 This Annex describes fixtures that may be used toadapt the device described in Test Method F504 to meet therequirements of ISO 9462 Method B.A1.2 Fixtures and Test ConfigurationsA1.2.1 Use the ski stiffening fixture described in Fig. A1.1and release

48、 loads as defined in Fig. 3 and Fig. 11 unlessotherwise specified.A1.2.2 To perform the release with ski deflection test, usethe fixture described in Fig. A1.2.A1.2.3 To perform the release with combined loading testfor influence of forward lean of the body, use the loadconfiguration defined in Fig.

49、A1.3 to apply the preload momentMy.A1.2.4 To perform the release with combined loading testfor influence of roll loading, use the fixture described in Fig.A1.4 to apply the preload moment Mx.FIG. A1.1 Ski Stiffening FixtureF504 05 (2012)6A1.2.5 To perform the release with combined loading testfor influence of backward lean of the body, use the loadconfiguration defined in Fig.A1.5 to apply the preload momentMy where the rear preload (RP) point is 35 cm behind thez-axis.A1.2.6 To perform the release with combined