Deform-3D擠型材料參數資料庫建立與擠型模擬及實驗分析驗證

Establishment of Deform-3D Extrusion Material Database & Analysis and Verification between Extrusion Simulation and Experiment

蔡秉訓(Ping-Hsun Tsai) ； 許志鵬(Chih-Peng Hsu) ； 張婉琪(Wan-Chi Chang)

《鍛造》 18卷2期 (2009/06) Pp. 8-12

https://doi.org/10.29791/Forging.200906.0002

摘要

擠型製程之擠壓比（extrusion ratio，為胚料斷面積與製品截面面積之比值）通常都在20以上，甚至有大於100以上的情況，由於材料在模穴內以及模口處變形極為劇烈，致使應變、應變率等均相當的大，在CAE而言，計算的準確度受限於本身演算法的能力，而目前的CAE分析法尚無法完全克服此一缺陷。有鑑於此，除了開發功能更強大的CAE軟體之外，就現階段可行之方向進行改善，也是相當重要的。對於數值分析計算的準確性而言，除了計算核心之外，最重要的就是輸入資料的正確性。吾人對Deform-3D的鋁合金材料參數資料庫作檢驗，發現雖然有相當多的鋁合金材料參數資料庫，但數據範圍與精確度並不甚佳。為此，吾人進行材料試驗，建立鋁合金材料之參數資料庫，以期改善模擬分析之準確度。本研究分成模擬分析與實驗兩部分，其中模擬分別以Deform-3D內建之材料參數資料庫以及材料試驗實驗求得之材料參數資料庫進行，並與實驗比較，分析Deform-3D內建與材料實驗得到之資料庫的準確性，並做為未來擠型模擬分析之參考依據及基準。

關鍵字

擠型 ； 材料參數資料庫

並列摘要

Extrusion ratio(section area ratio of billet & product) is usually greater than 20, sometimes greater than 100, material deformation is severe at die cave & outlet, causes heavy strain & strain rate. The accuracy of CAE is based on the capability of mathematical calculation. It is hard for CAE FEM software to be overcome right now. For this reason, it is important to improve based on the present feasible ways besides develop CAE software with powerful functions. For the accuracy of numerical analysis, there are 2 most important factors, one is the computational core, the other is the justness of input data. We inspect the Al alloy database of Deform-3D, and find that there are a lot of database in it, but therange and justness is a little bit uncertain. We do material tests to establish the database to improve the accuracy of simulation. There are 2 parts in this research: simulation and experiment. Simulations are done by using Deform-3D database and our database, and are compared with experiment to analyze the justness of both database. It can also be the reference for the extrusion simulation in the future.

並列關鍵字

Extrusion ； Material Database ； CAE