A Variational Approach to Upper-Bound Analysis of Bimetal Rod Extrusion
碩士 === 國立中央大學 === 機械工程學系 === 84 === The purpose of this research is to analyze bimetal rod extrusion with upper-bound method. The difference of this article from traditional ones is : During the process of minimizing the upper-bound ener...
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ndltd-TW-084NCU004890452015-10-13T14:34:57Z http://ndltd.ncl.edu.tw/handle/35775126626820336463 A Variational Approach to Upper-Bound Analysis of Bimetal Rod Extrusion 雙金屬圓桿擠製之變分上界限解析 Chung, Wen-Der 莊文德 碩士 國立中央大學 機械工程學系 84 The purpose of this research is to analyze bimetal rod extrusion with upper-bound method. The difference of this article from traditional ones is : During the process of minimizing the upper-bound energy,the variational approach isapplied. Besides kinematically admissible boundary condition, we can get naturalboundary conditions that traditional upper- bound method ignores. First,we assume the deforming field as generalizd boundaries of the plasticzone.From the satisfaction of kinematically admissible velocity field,we can derive upper- bound energy equation. With variational method,we can minimize energyequation to derive natural boundary condition of the core. As to the numericalupper-bound solution,ths rsearch uses the function "Findmin" of software "Mathematica". We also use it to decide the free parameters,and to calculate energy and predict the deforming behavior. Except the analysis of the effect of operation conditions on the energy and plastic deforming behavior,this article also compares with traditional upper-bound analysis.We get either lower energy consumption or the prediction of thedeforming field is more reasonable. Wei-Chin Yeh 葉維磬 1996 學位論文 ; thesis 83 zh-TW |
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碩士 === 國立中央大學 === 機械工程學系 === 84 === The purpose of this research is to analyze bimetal rod
extrusion with upper-bound method. The difference of this
article from traditional ones is : During the process of
minimizing the upper-bound energy,the variational approach
isapplied. Besides kinematically admissible boundary condition,
we can get naturalboundary conditions that traditional upper-
bound method ignores. First,we assume the deforming field as
generalizd boundaries of the plasticzone.From the satisfaction
of kinematically admissible velocity field,we can derive upper-
bound energy equation. With variational method,we can minimize
energyequation to derive natural boundary condition of the core.
As to the numericalupper-bound solution,ths rsearch uses the
function "Findmin" of software "Mathematica". We also use it to
decide the free parameters,and to calculate energy and predict
the deforming behavior. Except the analysis of the effect of
operation conditions on the energy and plastic deforming
behavior,this article also compares with traditional upper-bound
analysis.We get either lower energy consumption or the
prediction of thedeforming field is more reasonable.
|
author2 |
Wei-Chin Yeh |
author_facet |
Wei-Chin Yeh Chung, Wen-Der 莊文德 |
author |
Chung, Wen-Der 莊文德 |
spellingShingle |
Chung, Wen-Der 莊文德 A Variational Approach to Upper-Bound Analysis of Bimetal Rod Extrusion |
author_sort |
Chung, Wen-Der |
title |
A Variational Approach to Upper-Bound Analysis of Bimetal Rod Extrusion |
title_short |
A Variational Approach to Upper-Bound Analysis of Bimetal Rod Extrusion |
title_full |
A Variational Approach to Upper-Bound Analysis of Bimetal Rod Extrusion |
title_fullStr |
A Variational Approach to Upper-Bound Analysis of Bimetal Rod Extrusion |
title_full_unstemmed |
A Variational Approach to Upper-Bound Analysis of Bimetal Rod Extrusion |
title_sort |
variational approach to upper-bound analysis of bimetal rod extrusion |
publishDate |
1996 |
url |
http://ndltd.ncl.edu.tw/handle/35775126626820336463 |
work_keys_str_mv |
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