研究了激光冲击驱动飞片成形中相关工艺参数对成形性能的影响。采用适合高压高应变率的Johnson-Cook模型, 基于ANSYS/LS-DYNA软件平台, 数值模拟了激光冲击驱动飞片成形胀形件过程中激光能量、成形模具孔径以及模具圆角率与成形件成形高度的关系。分析表明, 随着激光功率密度、成形模具孔径和模具圆角率的增加, 胀形件成形高度均随之增加, 胀形件的最大成形高度为310.6 μm。对厚度为50 μm的铜箔材进行了激光冲击驱动飞片成形实验, 利用体视显微镜和形貌测量仪对获得的胀形件试样进行了二维和三维形貌测试, 验证了数值模型的合理性。本文建立的数值模拟分析方法为激光冲击驱动飞片成形胀形件过程的预测和控制提供了手段。

The effect of relevant process parameters on forming properties of laser shock flyers was investigated. By using the Johnson-Cook model suitable for a high pressure and a high strain rate and ANSYS/LS-DYNA software, the laser shock induced bulge forming of flyers was simulated to obtain the relation between the laser energies, forming die diameters and forming die fillet rates and the heights of forming parts. The analysis results show that as the laser power density, forming die diameter and the die fillet rate increase, the heights of bulging parts are increased, and the maximum height of bulging parts is 310.6 μm. Finally, an experiment of laser shock induced forming of flyers was carried out on a copper foil with a thickness of 50 μm. The two-dimensional appearance and three-dimensional microtopography of bulging parts were obtained with a stereomicroscope and a morphology measuring instrument.The results verify the reasonability of the numerical model.It concludes that the numerical simulation analysis method established in this paper can provide a means for the prediction and control of laser shock induced bulge forming processes of flyers.