欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    ASTM F734-1995(2006) Standard Test Method for Shear Strength of Fusion Bonded Polycarbonate Aerospace Glazing Material《航空航天用熔化胶结聚碳酸酯透明材料的剪切强度》.pdf

    • 资源ID:537188       资源大小:149.62KB        全文页数:5页
    • 资源格式: PDF        下载积分:5000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要5000积分(如需开发票,请勿充值!)
    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)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、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。

    ASTM F734-1995(2006) Standard Test Method for Shear Strength of Fusion Bonded Polycarbonate Aerospace Glazing Material《航空航天用熔化胶结聚碳酸酯透明材料的剪切强度》.pdf

    1、Designation: F 734 95 (Reapproved 2006)Standard Test Method forShear Strength of Fusion Bonded Polycarbonate AerospaceGlazing Material1This standard is issued under the fixed designation F 734; the number immediately following the designation indicates the year oforiginal adoption or, in the case of

    2、 revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method determines the shear yield strength Fsyand shear ultimate strength Fsuof fusi

    3、on bonds in polycarbon-ate by applying torsional shear loads to the fusion-bond line.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 an

    4、d determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 618 Practice for Conditioning Plastics for Testing3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 fusion bond, nthe bonding of two pieces of the samematerial usin

    5、g heat and pressure.3.1.2 shear, ninternal force tangential to the section onwhich it acts.3.1.3 shear strength, nthe maximum allowable stress in abody resulting from forces which tend to cause two contiguousparts of the body to slide relative to each other in a directionparallel to their plane of c

    6、ontact.3.1.4 torsional shear fixture, na device used to apply ashear force in the circular section of the test specimen toproduce a peripherally uniform stress distribution.4. Summary of Test Method4.1 Test specimens are prepared with a fusion bond at thecenter of a polycarbonate laminate joined to

    7、two metal testblocks. A twisting action is applied to one block and the loadrequired to fracture the fusion bond is transformed into thetorsional shear strength of the fusion bond.5. Significance and Use5.1 At this writing, aerospace quality extruded transparentpolycarbonate material is not availabl

    8、e in thicknesses greaterthan 0.5 in. (12.7 mm). When a requirement exists for sheetsthicker than 0.5 in. (12.7 mm), two or more sheets are fusionbonded together to form a single sheet of the desired thickness.5.2 The structural integrity of the completed transparencydepends on the integrity of the f

    9、usion bond. This test appliestorsional shear loads to measure the structural integrity of thefusion bond. This test method is considered more reliable andmore reproducible than shear tests in tension or compression.6. ApparatusNOTE 1A standard torsional test machine may be substituted for theapparat

    10、us described in this section. The machine shall have variableangular displacement rates from 8 to 800/min. (0.14 to 14 rad/min.). If atorsional test machine is used, the calibration and standardization inSection 8 should be disregarded.6.1 Torsional Shear FixtureIllustrations of the fixture areshown

    11、 in Figs. 1 and 2.6.2 Calibration Load ArmA lever arm with a load panshall be provided for purposes of calibrating the torsional shearapparatus.1This practice is under the jurisdiction of ASTM Committee F07 on Aerospaceand Aircraft and is the direct responsibility of Subcommittee F07.08 on Transpare

    12、ntEnclosures and Materials.Current edition approved Nov. 1, 2006. Published January 2007. Originallyapproved in 1981. Last previous edition approved in 2001 as F 734 95 (2001).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. Fo

    13、r Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.3 Universal Testing MachineAn autographically re-cording universal t

    14、ensile testing machine shall be used to applya constant rate of rotation to the torsional shear fixture bymeans of the loading cable. The machine shall have variablecrosshead rates (from 0.2 in./min 5.08 mm/min to 20 in./min508 mm/min.), and a calibrated load measurement mecha-nism usable in a range

    15、 from 0 to 200 lb (0 to 90 kg) in tension.6.4 Calibrated Spring Scales, 0 to 10 lb (4.54 kg) 6 1%,are required for calibration purposes.7. Test Specimens and Sample7.1 Machine test specimens to the geometry shown in Fig.3. Machine specimens at less than 1-m (3.28-ft)/s surfacevelocity to avoid heat

    16、buildup during machining. Position thegroove such that the fusion bond lies at the minimum diameterof the groove. The groove shall have a 125-in. (3-m) finish.7.2 Test a minimum of five specimens from each fusionbonded sheet. Sheets with multiple fusion bonds shall have fivetest specimens tested for

    17、 each fusion bond interface.8. Calibration and Standardization8.1 Attach the torsional shear fixture securely to the base ofthe test machine.8.2 Attach the calibration load arm to the rotatable shaft andtighten screw to preclude slippage. See Fig. 4.8.3 Determine the equivalent weight of the calibra

    18、ting armat the load pan with no torsional resistance in the apparatus andwith the load arm level. This load is L0.8.4 Measure the lever arm, D, in inches to 61 % accuracybetween the shaft center and the load pan pivot point.8.5 Calculate L1= (200/D)L0.FIG. 1 Torsional Shear Test Fixture (All Dimensi

    19、ons in Inches)F 734 95 (2006)28.6 Attach the loading cable to the testing machine load-weighing mechanism.8.7 Place a weight equal to L1in the calibrating arm loadpan and note reading L2on the testing machine weighingmechanism; L2is equivalent to 200 in. lb (22.6 N-m) of torque.Calculate a conversio

    20、n factor K, K = (200/L2).8.8 Remove calibration load arm from the torsional sheartest fixture.9. Conditioning9.1 Unless otherwise specified, condition the test specimensin accordance with Procedure A of Practice D 618.10. Procedure10.1 Measure the diameter (d) of each specimen at thegroove root to 6

    21、1 % accuracy.10.2 Insert the test specimen into the test specimen grips.10.3 Set crosshead separation to cause 360 (6.283 radians)rotation in the apparatus within 60 6 10 s.10.4 Record load at specimen yield, L3, and load at speci-men ultimate, L4, and autographically determine load rateDL/Dt and an

    22、gular strain rate, v, in the straight line portion ofthe autographic curve. Calculate the torsional loads T3= KL3and T4= KL4.NOTE 2If a torsional test machine is used, record the yield torque, T3,and the ultimate torque, T4, and autographically determine torque rate,DT/Dt, and angular strain rate, v

    23、, in the straight line portion of theautographic curve.11. Calculation11.1 The shear yield stress Fsy, and shear ultimate stress Fsuin pounds per square inch, are calculated by the formula:Fsy5 16T3/pd3, Fsu5 16T4/pd3(1)FIG. 2 Torsional Shear Test FixtureFIG. 3 Torsional Shear Test SpecimenF 734 95

    24、(2006)312. Report12.1 The report shall include complete identification of thematerial (manufacturer and thickness), test date, whether atorsional test machine or a tensile test machine was used, d, v,Fsy,Fsu, and shall note the failure mechanism of each speci-men, tearing of the polycarbonate, cleav

    25、ing of the fusion bond,or an estimate of the relative percentage of each.13. Precision and Bias13.1 PrecisionThis test method does not yet contain anumerical precision statement. The precison of this test methodis under investigation by a task group of Subcommittee F07.08via an interlaboratory study

    26、. Anyone wishing to participate inthis work may contact the Chairman, Subcommittee F07.08,ASTM, 100 Barr Harbor Dr., PO Box C700, West Consho-hocken, PA 19428-2559.13.2 BiasSince there is no acceptable reference materialsuitable for determining the bias for the procedure in this testmethod to determ

    27、ine shear strength of fusion bonded polycar-bonate, bias has not been determined.14. Keywords14.1 fusion bonded polycarbonate; shear strength; torsionFIG. 4 Calibration Load ArmF 734 95 (2006)4ASTM International takes no position respecting the validity of any patent rights asserted in connection wi

    28、th 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 any time by the responsible tech

    29、nical 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 will receive careful considerat

    30、ion 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 ASTM International, 100 Barr Ha

    31、rbor 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).F 734 95 (2006)5


    注意事项

    本文(ASTM F734-1995(2006) Standard Test Method for Shear Strength of Fusion Bonded Polycarbonate Aerospace Glazing Material《航空航天用熔化胶结聚碳酸酯透明材料的剪切强度》.pdf)为本站会员(syndromehi216)主动上传,麦多课文档分享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档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    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 

    收起
    展开