Abstract
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.
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