SiC陶瓷复合装甲超声辅助孔加工有限元仿真分析

Finite Element Simulation Analysis of Ultrasonic Vibration Aided Hole Machining for SiC Ceramic Composite Armor

由于SiC和GFRP材料的特殊性能,使得SiC陶瓷复合装甲制孔加工时容易出现各种缺陷。利用ABAQUS有限元软件分别对SiC和GFRP进行制孔加工仿真,常规加工和超声辅助加工的仿真对比结果表明:超声加工轴向力明显降低,加工完整度保存较好,在孔边处几乎没有明显的损伤;常规加工的孔径周边有明显的阶梯状缺口,制孔质量较差,引入超声振动可以更好地改善材料的去除效果,使套料钻能够高效地切断纤维,降低轴向力,提高制孔加工质量。

Due to the special properties of SiC and GFRP materials,various defects are prone to occur during hole making of SiC ceramic composite armor.Using ABAQUS finite element software,SiC and GFRP are respectively simulated and analyzed for hole making,and the simulation results of conventional machining and ultrasonic vibration-assisted machining are compared.Compared with conventional machining,the axial force of ultrasonic machining is obviously reduced,the integrity of the hole diameter is better preserved,and there is almost no obvious damage at the edge of the hole.The introduction of ultrasonic vibration can better improve the material removal mechanism,making the nesting drill.It can cut fibers efficiently,reduce the axial force,improve the quality of hole making and reduce the axial force.