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    题名: A variational upper-bound method for plane strain problems
    作者: Yeh,WC;Yang,YS
    贡献者: 機械工程學系
    关键词: N/A
    日期: 1996
    上传时间: 2010-06-29 18:05:41 (UTC+8)
    出版者: 中央大學
    摘要: In this paper, a variational upper-bound (VUB) method is proposed. It is the method that determines an upper-bound solution using variational calculus. By using the method, a set of so-called ''naturally boundary conditions,'' which were all ignored in past investigations, can be theoretically derived for the rigid/plastic interface assumed to be arbitrary function in prior. This method is shown to be applicable to the cup ironing problem. From the result we can clearly indicate the role of these natural boundary conditions which reasonably account for the effect of friction on the pattern of metal flow. The VUB method not only presents an improvement on the traditional upper-bound method, but also favorably agrees with experimental result of Nielsen et al. (1963) in calculating upper-bound energy.
    關聯: JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
    显示于类别:[機械工程研究所] 期刊論文

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