基于ANSYS Workbench铝合金双轴疲劳试验仿真研究

主要以国家重大工程专项子项目《铝合金双轴额定细节疲劳强度试验研究》为依托,以十字形铝合金薄板试件为研究对象,利用有限元软件ANSYS Workbench建模并进行数值模拟,侧重研究十字形铝合金在0°、90°及180°三种相位差交变循环载荷作用下的应力分布、变形情况及疲劳寿命,比较分析了铝合金在不同相位差下双轴受力情况的差异,并对可视化的图形图像和计算结果进行了分析。通过与试验的对比确定了实际变形和理论分析基本一致,表明在ANSYS Workbench中建立的十字形铝合金试件模型是准确且可信的。在双轴疲劳试验中,应重点监控该十字形铝合金的中间圆孔区域,为大飞机用铝合金结构设计与强度评估提供了基础的技术支持。

Simulation Study on Biaxial Fatigue Test of Aluminum Alloy Based on ANSYS Workbench

Based on the“fatigue strength test study on rated details of aluminum alloy double shafts”,a sub-project of the national major engineering project,taking the cross-shaped aluminum alloy sheet as the research object,the finite element software ANSYS Workbench was used to model and simulate.The stress distribution,deformation and fatigue life of cruciform aluminum alloys under cyclic loads with phase difference of 0,90°and 180°were studied.The difference of biaxial force of aluminum alloy under different phase difference was compared and analyzed and the visualized graphics,images and calculation results were analyzed.Finally,the actual deformation and theoretical analysis were basically identical by comparison with the experimental results.It shows that the model of cross-shaped aluminum alloy specimens established in ANSYS Workbench is accurate and reliable.The central circular hole area should be monitored in the biaxial fatigue test of the cruciform aluminum alloy.It provides basic technical support for structural design and strength evaluation of aluminum alloy for large aircraft.