ASTM F780-1993a(2018) Standard Test Method for Linear Deformation and Breaking Strength of Alpine Skis.pdf
《ASTM F780-1993a(2018) Standard Test Method for Linear Deformation and Breaking Strength of Alpine Skis.pdf》由会员分享,可在线阅读,更多相关《ASTM F780-1993a(2018) Standard Test Method for Linear Deformation and Breaking Strength of Alpine Skis.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: F780 93a (Reapproved 2018)Standard Test Method forLinear Deformation and Breaking Strength of Alpine Skis1This standard is issued under the fixed designation F780; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the ye
2、ar 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 the determination of lineardeformation load and breaking load for Alpine skis.21.2 This test
3、 method is applicable to all Alpine skis.1.3 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, health, and environmental practices and deter-mine the applicabili
4、ty of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the Wor
5、ld Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3D2240 Test Method for Rubber PropertyDurometer Hard-nessF472 Terminology for Geometry of Alpine Skis3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 breaking load (FB)the
6、 maximum load applied inaccordance with Sections 6 and 7 (that is, the maximum loadwhich the ski can sustain).3.1.2 deformation load (FD)the load applied in accor-dance with Section 6 that causes a permanent deformation of 1mm at the load application point of the ski.4. Significance and Use4.1 This
7、test method provides information concerning theresistance of a ski to permanent bending and an indication of itsbasic strength. It is not intended to evaluate the data withregard to the quality of the ski.5. Apparatus5.1 This test method shall be conducted on a device (seeFig. 1) equipped with adjus
8、table supports, a load (F) applica-tion system (1) with a range of at least 20 000 N and readingaccuracy of 650 N, and with an instrument (2) for readingbending deformation (d) with an accuracy of 0.01 mm. Thesystem must have a controlled deflection rate. A standarduniversal tension/compression test
9、ing machine with X Yrecorder (3) is typical of such a system.5.2 The test method is made with the ski in its normalhorizontal position, and the overhanging portions of the ski areleft free to deflect.5.3 The test system shall be set up in accordance with Fig.1 (Section A) with a 250-mm distance betw
10、een supports andone support made with a 25-mm diameter, low-friction roller atpoint of contact with the ski. The end support shall be sodesigned as to have a hinged clamp which prohibits lineardisplacement, yet permits rotation about the support. The loadis applied through a plate as shown in Fig. 1
11、 (Section B), 25mm wide and of length equal to or slightly greater than thewidth of the ski, made up of a steel plate (5) and a hard rubber(95 6 5 ShoreAdurometer; see Test Method D2240) layer (4).The plate must be free to rotate under loading ram.6. Determination of Load Application Point6.1 In ord
12、er to obtain comparable values, the test shall beconducted at the load application point with a separationbetween the supports of 250 6 0.5 mm. Determine the loadapplication point by moving the ski in a longitudinal directionon the supports until a deflection is obtained under a load of600 6 5 N in
13、accordance with the table shown below:Ski Length, LN,mm (see Terminology F472)Deflection,mmTolerance,mm1700 # LN2 0.031400 # LN 1700 4 0.031000 # LN 1400 6 0.030750 # LN 1000 8 0.031This test method is under the jurisdiction of ASTM Committee F27 on Snowand Water Sports and is the direct responsibil
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMF7801993A2018STANDARDTESTMETHODFORLINEARDEFORMATIONANDBREAKINGSTRENGTHOFALPINESKISPDF
链接地址:http://www.mydoc123.com/p-537263.html