(中铝材料应用研究院有限公司，北京 102209)
摘 要: 建立准确的材料模型是冲压数值模拟的基础，通过3个方向的单向拉伸试验、以及单向压缩试验和成形极限试验，获得5754铝合金材料性能数据，基于Voce硬化模型、Barlat89屈服准则和成形极限，建立5754铝合金成形用材料模型。利用Pamstamp-2G软件，对5754铝合金汽车大梁的冲压成形进行数值模拟，并与冲压试验结果进行对比。结果表明：数值模拟获得的应变数据与试验测量获得的应变数据比较接近，且各区域最大减薄率误差在±10%以内，验证数值模拟的可靠性。
关键字: 5754铝合金；硬化模型；屈服准则；成形极限；数值模拟
（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
