(中鋁材料應(yīng)用研究院有限公司，北京 102209)
摘 要: 建立準(zhǔn)確的材料模型是沖壓數(shù)值模擬的基礎(chǔ)，通過(guò)3個(gè)方向的單向拉伸試驗(yàn)、以及單向壓縮試驗(yàn)和成形極限試驗(yàn)，獲得5754鋁合金材料性能數(shù)據(jù)，基于Voce硬化模型、Barlat89屈服準(zhǔn)則和成形極限，建立5754鋁合金成形用材料模型。利用Pamstamp-2G軟件，對(duì)5754鋁合金汽車(chē)大梁的沖壓成形進(jìn)行數(shù)值模擬，并與沖壓試驗(yàn)結(jié)果進(jìn)行對(duì)比。結(jié)果表明：數(shù)值模擬獲得的應(yīng)變數(shù)據(jù)與試驗(yàn)測(cè)量獲得的應(yīng)變數(shù)據(jù)比較接近，且各區(qū)域最大減薄率誤差在±10%以內(nèi)，驗(yàn)證數(shù)值模擬的可靠性。
關(guān)鍵字: 5754鋁合金；硬化模型；屈服準(zhǔn)則；成形極限；數(shù)值模擬
（CHINALCO Materials and Application Research Institute, Beijing 102209, China）
Abstract:An accurate material model is the basis for numerical simulation of stamping. By means of tensile tests in three directions, uniaxial compression tests and forming limit tests, the material property data of 5754 aluminum alloy is obtained. Based on the Voce hardening model, Barlat89 yield criterion and forming limit curves, the material model of 5754 aluminum alloy for stamping was established. With the Pamstamp-2G software, the stamping operation of automobile girders of 5754 aluminum alloy was simulated, which was compared with the actual stamping operation. The results show that the plastic strain calculated by the simulation is close to the experimental measurement one, the maximum thinning rate error is within ±10%, which verifies the reliability of numerical simulation.
Key words: 5754 aluminum alloy; hardening model; yield criterion; forming limit; numerical simulation
