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

    REG NACA-TR-1117-1953 A Study of Elastic and Plastic Stress Concentration Factors Due to Notches and Fillets in Flat Plates.pdf

    • 资源ID:1017558       资源大小:597.39KB        全文页数:10页
    • 资源格式: PDF        下载积分:10000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10000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。

    REG NACA-TR-1117-1953 A Study of Elastic and Plastic Stress Concentration Factors Due to Notches and Fillets in Flat Plates.pdf

    1、REPORT 1117A STUDY OF ELASTIC AND PLASTIC STRESS CONCENTRATION FACTORS DUE TONOTCHES AND FILLETS IN FLAT PLATES 1By HEEBIIBTF. HAEDBATHandLACHLAN OHMANSUMMARYSix large 2L-53 alunvkuwhy-dwet 8pecimm3 cOntain-i variommtch.txwfltk% weretestedin temionto determinetheirstTes8concentration fact0r8 in both

    2、 the elmtic and plmticranges.The elaalti sW38 concentration factors were fownd to beslightly higher than. tlwse cakulakd by Neuber8 method andtho8e obtained photd.a.sttiy Tocht. lh.e rtxu.h 8howedfurther that tlw 8tre38concentration factor deeream a8 straimat the discontinuity enter the piMiz range.

    3、A generakation of L!3towtis rd.ationfor tb pbtti 8tre38concentration factor at a circular Me in an in$nit# plute mappkxi to tk 8pecim.ei 8h5pk t.ed and gave good agTWIW%tWiJ?hL?.9tT three, designated by F, contained Mets.In each group of three there was a panel designed to have anominal stress conce

    4、ntration factor of 2, one of 4, and one of6; hence the specimens are designated N2, N4, N6 and F2,F4, and F6. (Specimen dimensions are shown in detail infigs. 1 and 2.)The panels were cut from sheets 54 inches wide. Excessmaterial from the region near the notches or fiIlets was usedto make standard

    5、tensile coupons, four for each panel.Standard tensile tests run on these coupons yielded stmss-strain curves. Each of the shww-stmin curves as presentedin iignre 3 is an average of the four curves obtained from thefour coupons for each panel.Four types of strain gages were used in the investigation.

    6、On panels N2 and F2 Tuckerman optical strain gages with aX-fich gage lth were moted on tie face at the edge ofthe panel at the critical points which are defined as.the pointson each panel where the maaimum stress concentrationsoccur. In a notched specimen the maximum stress occursat the center of th

    7、e base of the notch. Photo elastic studiesof filleted specimens (ref. 6) indicate that the maximumstress occurs at a point about 10 around the fillet from thetangent between the iillet and the straight side of the reducedpart of the panel. Straim3 at the critical points of panelsN4, N6, F4, and F6 w

    8、ere measured with fie-inch-gage-lengthelectromagnetic extensometers mounted on the edges of thepanels at the critical points. (See figs. 1 and 2.)Baldwin SR4 type A5 strain gages were applied atintervals across the width of each panel at the net section todetermine the strain distribution at that se

    9、ction (figs. 1and 2). In a no.tohed panel the net section is dd0) .15fFremm S.-EfastfoatrwaamcentmtkdrfnotomforSlfetedsw.lmanni5)Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-13LASTIC AND PLASTIC STRESS CONCENTRATION FACPORS DUE TO NOTCHES AND FILL

    10、ETS IN FLAT PLATRS 217PLA13TfC8TBE3SCONCENTRAON FACTORS AND A SUGGESTED FORMULA IIigurea 6 and 7 show the experimentally determined stressconcentration factom plotted against average net-sectionstress. The stress concentration factors start to decrease asthe load on a panel exceeds a value suilicien

    11、t to cause plasticyielding at the critical point.Stowell (ref. 12) presented a relation to be used in calcu-lating the stress concentration factor in the plastic rangefor a circular hole in an infidite plate subjected to tension.This relation states that at any one instant in the loading- a-+ :,.-SY

    12、:+r“ w20 40 fin.“Awoge net-section stress, St-ksiFmcms 19.-Stms3 concentrationfaotorfora t platnwith a chuhr hdo khstad wfrom the E&e.3 I Ik O Expsrinmt(ref.9)s FwrmJo (2)z o 0& o5F!: . .0 20 40 60rherq-e m+ectbn stress, S, Waux 20.-Shcss czmomtraffon faotor foraflatPI.WwSthasfn mntrol,drdor 1100.3.

    13、 Ling, Chih-Bing: Stressm in a Notched Strip Under Tension,Jour. Appl. Me&., vol. 14, no. 4, Dee. 1947, pp. A-276-&MO.4. Ling, Chih-Bing:On the StreeSMin a Plate Containing TNO Cir-0* Holes. Jour. Appl. Physics, vol. 19, no. 1, Jan, 194S,pp. 77-82.5. HoMand, 1% C: J.: On the Stresses in the Neighbor

    14、hood of a&cular Hole in a Strip Under Tension. Phil, Trans. Roy. SOO,(London), sm. A, vol. 229, Jan. 6, 1930.6. Tirnosherdm, S.: Theory of Ekrgtioity. First cd., MoGrrnv-HillBook Co., Irm., 1934.7. Tirnoehenko, S.: Strength of Materiala, Part 11-AdvanoedTheory and Problems. Second cd., D. Van Nostra

    15、nd Co., Ino.,1941.8. Grif3th, George E.: erimental Investigation of the Effoote of910.11.12.Plastio Flow in a Tension Pahel With a Ciroular Holo. NA(YATN 1705, 1948.Box, William A.: The Effect of Pla.stio Strains on Strc.qef.2cmcen-titora. Proc. Soo. Experimental Stress Analysisj vol. VIII, no,2, 19

    16、61, pp. 99-110.Frooht, M. M.: A Photoelastio Investigation of Stroee Conoentr&tions Due to Small Fillets and Grooves in Tension. NA(YATN 2442, 1951.(%ker, E. G., and Filon, L. N. G.: A Tmatfse on Photo-Elasticity.Cambridge Univ. Press (London), 1931.Stmve Elbridge Z.: stress and Strain Concentration m+a CirouhmHole in an InRnite Plate. NACA TN 2073, 1950,.-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-


    注意事项

    本文(REG NACA-TR-1117-1953 A Study of Elastic and Plastic Stress Concentration Factors Due to Notches and Fillets in Flat Plates.pdf)为本站会员(cleanass300)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