【摘要】：自行設(shè)計(jì)并研制了一套獲取板材熱沖壓成形極限圖的試驗(yàn)系統(tǒng),開(kāi)展了6061-T6鋁合金板材在不同應(yīng)變路徑及溫度下的成形極限研究,獲得了其在25~300℃的成形極限圖。使用MSC.MARC軟件對(duì)6061-T6鋁合金板材的熱沖壓成形進(jìn)行數(shù)值模擬,研究了失穩(wěn)判斷方法對(duì)不同溫度下成形極限預(yù)測(cè)的影響。結(jié)果表明:6061-T6鋁合金在室溫下的極限應(yīng)變值很低,塑性較差;變形溫度升高到200℃時(shí),極限應(yīng)變值平均提高了99.5%;變形溫度從200℃升高到300℃時(shí),極限應(yīng)變值進(jìn)一步提高了23.5%,其塑性也顯著提高。采用最大載荷判斷法和應(yīng)變路徑判斷法相結(jié)合的失穩(wěn)狀態(tài)判斷準(zhǔn)則能準(zhǔn)確預(yù)測(cè)6061-T6鋁合金的熱成形極限,模擬結(jié)果和試驗(yàn)結(jié)果吻合較好。
[Abstract]:A set of test system for obtaining forming limit diagram of sheet metal hot stamping was designed and developed. The forming limit of 6061-T6 aluminum alloy sheet at different strain paths and temperatures was studied, and the forming limit diagram at 25 鈩，

本文編號(hào)：2446212