两工位激光单次同步冲击TC4钛合金薄板成形的数值模拟

Numerical Simulation of TC4 Titanium Alloy Sheet Forming by Singly Synchronized Two-Station Laser Shocking

根据现有的激光冲击成形理论,利用有限元分析软件ANSYS/LS-DYNA,通过合理的简化、建模及单元的选择、材料属性的设定、网格的划分、约束的施加、求解的控制等,建立了TC4钛合金薄板两工位激光单次同步冲击成形的有限元模型,并对成形的过程进行了数值模拟。在后处理中绘制了成形过程的动态响应曲线,分析了冲击波在靶材中的传播及衰减特点;通过路径的操作,绘制了成形后的轮廓曲线,并对应力分布状况进行了深入分析,为激光同步冲击成形的研究与应用提供参考。

According to existing theory of laser shock forming, using finite element analysis software ANSYS/LSDYNA, through the reasonable simplification and modeling, and by carefully setting up the material properties, selecting elements, meshing, applying constraints, and controlling the solving steps, a finite element model for TC4 titanium alloy sheet forming by single synchronized two-station laser shocking is established and the forming process is simulated. In the post-processing, the dynamic response curve in the forming process is drawn and the characteristics of the shock wave propagation and attenuation in the target are analyzed. By using path operation, the formed contour curve is given and the stress distribution is further studied and analyzed. The study provides reference for the investigation and application of synchronized laser shock forming.