Numerical study on the splitting of a vapor bubble in the ultrasonic assisted EDM process with the curved tool and workpiece

► In this research we model the ultrasonic assisted EDM process numerically. ► Boundary integral method is applied for modeling of this research. ► Dynamic behavior of vapor bubble after its splitting near curved tool and workpiece is investigated. ► Effects of the ultrasonic vibration of the tool are investigated. ► Ultrasonic vibration of the tool causes to reduction of tool erosion.