ABSTRACT Today, the use of multi-layer sheets has expanded widely in various industries. The determination of the forming limit curve for sheets is essential. In this project, three-layer aluminium1100-copper10100-aluminium1100 sheet was produced using an explosive welding method and cold rolling up to 85% strain. Then to eliminate the rolling microstructure and create the isotropic properties and to investigate the effect of annealing temperature on formability, three-layer sheets were annealed at 350°C, 400°C, and 450°C for one hour. Afterward, the numerical and experimental forming limits for these sheets are obtained at room temperature. ABAQUS finite element software and Freudenthal, Cockcroft, and Brozzo ductile fracture criteria were used in numerical method, and punch stretching test was used in the experimental method.

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不同温度退火的三层接合铝/铜/铝板的成形性研究

摘要今天，多层板的使用已广泛应用于各个行业。板材成形极限曲线的确定是必不可少的。在该项目中，采用爆炸焊接方法和高达 85% 应变的冷轧生产三层铝 1100-铜 10100-铝 1100 薄板。然后为了消除轧制组织和创造各向同性的性能并研究退火温度对成形性的影响，三层板在 350°C、400°C 和 450°C 下退火 1 小时。然后，在室温下获得这些板材的数值和实验成形极限。数值方法采用ABAQUS有限元软件和Freudenthal、Cockcroft和Brozzo韧性断裂准则，实验方法采用冲头拉伸试验。