基于数值模拟的方法研究在循环塑性变形下铝合金板的力学行为。首先,通过Cockcroft-Latham韧性断裂准则得到材料的断裂极限应力图,并通过实验对成形极限应力图进行验证。数值模拟结果表明:滚边时弯曲中心的应变路径可以认为是平面应变状态;采用绳式滚边方法可以改善在弯曲中心线上的应力集中现象。从滚边断口的扫描电镜照片可以发现,循环塑性变形对铝合金板的韧性断裂行为有影响。 Mechanical Behavior of Aluminum Alloy Plates under Cyclic Plastic Deformation Based on Numerical Simulation. First, the fracture ultimate stress diagram of the material is obtained by Cockcroft-Latham ductile fracture criterion, and the forming limit stress diagram is verified through experiments. The numerical simulation results show that the strain path of bending center can be regarded as plane strain when the edge is curled, and the stress concentration on the bending center line can be improved by the rope edge method. Scanning electron microscopy (SEM) images of the broken edge of the roll show that the cyclic plastic deformation has an effect on the ductile fracture behavior of the aluminum alloy sheet.