鋁合金材料質輕、美觀、高強度等特色，早期於航太、汽機車產業，現今生活中各式3C產品，都大量使用做為輕量化結構、金屬外殼等用途。選擇以高能率之電磁成形製程加工鋁合金板件，可提高可成形性，也可避免傳統加工常面臨之回彈問題。
本研究針對電磁成形製程，以鋁合金6061-T6板材進行實驗。利用有限元素軟體LS-DYNA，根據所設計之衝頭與試片幾何，評估其應變路徑，以規畫出可產生第二象限分散且線性應變路徑之可成形性試驗衝頭與試片幾何。
接著以實驗建立了材料在高速下第二象限分散應變路徑之成形極限，同時也使用電磁耦合模擬軟體LS-DYNA980模擬此可成形性試驗，透過比對實驗與模擬之試片外形、應變路徑趨勢，證實耦合模擬可準確預估電磁成形可成形性試驗。

Aluminum alloy has the characteristics of high strength and lightweight, which is widely applied to aeronautical, automobile industries and 3C (computer, consumer electronics and communication) industries. Forming aluminum sheet by Electromagnetic Forming Process (EMFP) has the advantages to increase formability and avoid the spring-back problem.
In this research, the formability test for electromagnetic forming process was established. The Forming Limit Diagram at high strain rate up to 9000 s-1 for different strain path in the second quadrant were generated by changing the shape of an aluminum alloy Al6061-T6 sheet and ring punch geometry.
Using the Electromagnetic coupled finite element software LS-DYNA 980 to the formability test is simulated and compared with the experimental results. The proposed experimental design has been confirmed to be able to obtain the forming limit of sheet at different strain path in the second quadrant. The coupled simulation could predict the formability test for electromagnetic forming is good agreement with the experimental rasults.

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