複合金屬板材板液壓成形之有限元素分析

Abstract

本研究利用有限元素軟體ABAQUS針對應用於Ti /Al複合金屬板材之板液壓成形進行有限元素分析，藉由模擬板件在成形過程中之厚度分佈與減薄率，深入探討各項製程參數如：壓板力、液壓力、模具間隙、料片尺寸等，對於複合金屬板件的成形性影響。 為了模擬與實驗的共同性與真實性，本研究首先藉由材料試驗取得金屬板材之基本材料性質與方向性，之後建構出板液壓製程之有限元素模型，並利用創新之虛擬薄膜模擬液壓缸壓力之作用，確實趨近現實之壓力狀態。最後將有限元素分析的結果與實驗相互驗證，檢視有限元素分析的準確性後，針對各種不同製程參數對成形結果的影響進行探討。本研究同時也利用實驗初步證明以Ti /Al複合金屬板材取代Ti單一金屬板材之適用性。

This research used ABAQUS to analyze the hydroforming process for Ti-cp1/A1050 clad metal sheet, and also examined the formability of clad metal sheet by measuring the thickness distribution and thinning ratio. These two indications will be influenced by important factors like holding force, internal pressure, tooling gap and blank size. For the authenticity of simulation, the material properties were first obtained through experiments, and then the concept of a virtual film was used to realistically mimic the pressure loading in the finite element model. After comparing the results of simulation and experiment for verifying the finite element model, this research also focused on the formability of clad metal sheets during hydroforming process which influenced by various process parameters. This research also verified the possibility of using Ti /Al clad metal sheet to substitute for traditional Ti single metal sheet.