等通道扭轉彎角擠製之有限元素法及反應曲面法分析

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题名:	等通道扭轉彎角擠製之有限元素法及反應曲面法分析
作者:	李紹玄;Lee, Shao-Hsuan
贡献者:	機械工程學系
关键词:	等通道扭轉彎角擠製;有限元素分析;Box-Behnken
日期:	2019-07-29
上传时间:	2019-09-03 16:35:34 (UTC+8)
出版者:	國立中央大學
摘要:	本文透過有限元素軟體Deform-3D進行等通道扭轉彎角擠製(TCAP)的模擬分析，探討影響試片變形程度以及變形均勻性的參數及其效應。本文之設計參數包括模具的參數旋轉角、扭轉斜角、彎道角與外圓弧角。實驗設計採用適合建構二階反應曲面之Box-Behnken 四因子三水準的設計，建立共25組模擬，利用統計軟體Minitab依Deform-3D有限元素軟體分析的結果進行迴歸分析，以建立等通道扭轉彎角擠製之平均等效應變、最大成形力及應變變異數的預測模型，進而探討各因子對平均等效應變、最大成形力及應變變異數的影響以及最佳的設計參數之水準。本文所建立的平均等效應變、最大成形力及應變變異數預測方程式與有限元素模擬的結果進行驗證，其結果顯示預測模型具有相當的準確度。;An ideal FE model of twist channel angular pressing is developed under the Deform-3D software and discuss effect of deform and effective strain uniformity are in this study. The factors in the design include twist rotation anle , twist slope angle , channel angle and outer corner angle. The experimental design uses a Box-Behnken 4 factor 3 level design suitable for constructing second-order response surfaces, and a total of 25 sets of simulations are established. The statistical software Minitab is used for regression analysis based on the results of Deform-3D finite element software analysis to establish the prediction model of the average effective strain, the maximum forming force and the strain uniformity of the extrusion. It is excepted using the FEM model and surface response methodology to find the optimum design of parameters. The simulation results of this paper and the experimental results areverified first. The results show that the finite element software has certain reliability, and the average effective strain , the maximum forming force and the strain uniformity prediction equation established with the results of finite element simulations to verify the results show the prediction model with considerable accuracy.
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