中大機構典藏-NCU Institutional Repository-提供博碩士論文、考古題、期刊論文、研究計畫等下載:Item 987654321/50032
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 69561/69561 (100%)
造访人次 : 23156169      在线人数 : 421
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/50032


    题名: A general upper-bound formulation of stream function of upset forging of ring using a variational approach
    作者: Yeh,WC;Wu,MC;Hong,JJ
    贡献者: 機械工程學系
    关键词: DEFORMATION;FRICTION;SURFACE;DISKS
    日期: 2010
    上传时间: 2012-03-27 17:01:36 (UTC+8)
    出版者: 國立中央大學
    摘要: Based on an upper-bound energy dissipation equation established as a functional, a general formulation is derived for stream function of upset forging of ring using a variational approach. The general formulation consists of an equilibrium equation of the stream function along with a set of statically boundary conditions which were usually ignored in past investigation. In order to demonstrate the effect of the statically boundary condition on upper-bound solution and in order to verify the validity of the upper-bound solution as well, the experimental results also carried out in this investigation have been compared with the upper-bound solution for discussion. Both VUB and corresponding UB solutions were determined by optimizing a chosen stream function under consideration of the same degree of freedom. From the result we can clearly indicate that the VUB solution does present an improvement on the corresponding UB solution in predicting bulged profiles of upset forging of ring and disk. Such an improvement is only due to the fact that it is additionally imposed on the VUB solution the available statically boundary condition, which constrains plastic flow of the upsetting ring or disk on the frictional interface during upsetting process. (C) 2010 Elsevier B.V. All rights reserved.
    關聯: MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
    显示于类别:[機械工程學系] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    index.html0KbHTML205检视/开启


    在NCUIR中所有的数据项都受到原著作权保护.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈  - 隱私權政策聲明