本文透過有限元素軟體Deform-3D進行等通道彎角擠製(ECAE)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試片的溫度T、試片與通道間的摩擦因子m、模具通道角度Ø、通道外圓弧角度Ψ以及內側圓弧半徑r。實驗設計採用適合建構二階反應曲面之Box-Behnken 5因子3水準的設計，建立共41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，以建立等通道彎角擠製之平均等效應變及應變均勻度的預測模型，進而探討各因子對平均等效應變及應變均勻度的影響以及最佳的設計參數之水準。本文之模擬結果與實驗結果先行驗證，結果顯示有限元素軟體具有一定的可靠性，再利用這些結果建立平均等效應變及應變均勻度預測方程式，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 equal channel angular extrusion 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 temperature , friction factor , channel angle , outer corner angle and inner corner radius. The experiment adopts 41 groups of analogs with the Box-Behnken design. Use the Minitab software to do the regression analysis and develop the predicted equations. By doing so, it’s excepted using the FEM model and surface response methodology to find the optimum design of the average effective strain and effective strain uniformity.
The simulation results of this paper and the experimental results are verified first. The results show that the finite element software has certain reliability, and average effective strain and 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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