Simulation and research on ultrasonic vibration-assisted grinding of cortical bone
In the craniotomy,grinding as a conventional precision machining method can achieve efficient bone tissue removal.Aiming at the problem that excessive grinding force is easy to cause bone cracks and bone tissue damage,based on the kinematic equations of ordinary grinding and ultrasonic vibration-assisted grinding,a finite element simulation model of ultrasonic vibration-assisted cortical bone grinding was established.Combined with the experimental results,a quadratic regression prediction model of grinding parameters and ultrasonic vibration parameters on grinding force was obtained.The effects of grinding speed,grinding depth,and ultrasonic amplitude on grinding force were studied.The results showed that the grinding force increases with the increasing of grinding speed and depth.Within the selected ultrasonic amplitude range,the grinding force first decreases and then increases slightly as the ultrasonic amplitude increases.The reasonable selection of grinding parameters can effectively reduce the grinding force.
cortical bone grindingultrasonic vibrationgrinding forceresponse surface analysis
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