| DC 欄位 |
值 |
語言 |
| DC.contributor | 機械工程學系 | zh_TW |
| DC.creator | 張致維 | zh_TW |
| DC.creator | Chih-wei Chang | en_US |
| dc.date.accessioned | 2013-8-29T07:39:07Z | |
| dc.date.available | 2013-8-29T07:39:07Z | |
| dc.date.issued | 2013 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=100323025 | |
| dc.contributor.department | 機械工程學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 等通彎角擠製為一種有效及常見之方法使得材料產生大量塑性變形，進而使得晶粒細化以達到強化材料機械性質，因此本文使用商業有限元素軟體DEFORM-3D，分析超音波輔助等通彎角擠製加工鋁1070問題，本文首先根據實驗之結果，驗證有限元素軟體DEFORM-3D對於等通彎角加工分析之適妥性，接著利用沖頭附加軸向超音波振動輔助等通彎角擠製，探討不同振幅，不同外圓弧角度(Ψ)對沖頭負載與擠製料片之應變分布。其結果顯示，超音波對於降低沖頭負載以及應變分布均勻性皆具有良好效應，並且透過增加振幅可以提高其效應。 | zh_TW |
| dc.description.abstract | Equal-channel angular extrusion is a prominent and effective method for achieving ultra-fine grain (UFG) structured among the various severe plastic deformation (SPD) techniques. The effect of ultrasonic vibration on aluminum 1070 alloy in the ECAE process is analyzed using DEFORM-3D software by finite element methods (FEMs). Firstly the result of experiment is applied to improve the accuracy of DEFORM-3D software in ECAE process. The effect of different ultrasonic amplitudes and outer corner angles (Ψ) on the punch load and strain inhomogeneity is discussed . The result reveals that ultrasonic vibration can decrease the punch load and improve the strain inhomogeneity by increasing the ultrasonic amplitude | en_US |
| DC.subject | 超音波 | zh_TW |
| DC.subject | 等通彎角擠製 | zh_TW |
| DC.subject | FEM | zh_TW |
| DC.subject | Ultrasonic | en_US |
| DC.subject | ECAE | en_US |
| DC.subject | 有限元素分析 | en_US |
| DC.title | 超音波振動補助等通彎角擠製之有限元素分析 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |