Improving the machining quality of Aramid Fiber Reinforced Plastics (AFRPs) is of great significance for industrial manufacturing in various fields but it is challenging. Existing conventional machining (CM) generally brings about subsurface damage and severe burr. In this study, the longitudinal-torsional ultrasonic vibration milling (LTUVM) was applied to AFRPs machining to solve these issues. Burr improvement was analyzed in terms of friction, strain rate and material removal mechanism, via experiments, theoretical calculations, and single-fiber removal simulations. A cutting numerical model of AFRPs was established for the first time, and the damage behaviors of the subsurface were evaluated from aspects of stress analysis and damage depth. Experimental and theoretical results opened a new avenue for the ultrasonic vibration machining of toughness composites. The experimental and simulation results agree well. The numerical model provoked a more in-depth insight into the experimental image.

提高芳纶纤维增强塑料（AFRPs）的加工质量对各个领域的工业制造具有重要意义，但具有挑战性。现有的常规加工（CM）通常会带来次表面损伤和严重的毛刺。在这项研究中，纵向扭转超声振动铣削 (LTUVM) 被应用于 AFRPs 加工以解决这些问题。通过实验、理论计算和单纤维去除模拟，从摩擦、应变率和材料去除机制方面分析了毛刺的改善。首次建立了AFRPs的切削数值模型，从应力分析和损伤深度等方面评价了地下的损伤行为。实验和理论结果为韧性复合材料的超声振动加工开辟了一条新途径。实验和模拟结果吻合良好。数值模型激发了对实验图像的更深入了解。