Influence of Micro-texture Parameters on Bone Drilling Force and Torque: A Finite Element Model

[摘要] The micro-texture on the tool surface is an effective way to improve the quality of the drilling. While high-performance micro-texture plays an important role in improving the quality of working surface and prolonging the life of tool. In this study, a three-dimensional finite element model was established to study the relationship between drilling thrust, torque and microstructure parameters (micro-pit depth, micro-pit diameter and micro-pit spacing) during drilling of cortical bone. The model was validated by cortical bone drilling using a micro-structured tool. On basis of this, the thrust and torque prediction models of the micro-texture parameters were obtained. The results indicate that the thrust and torque increased with the increase of micro-pit diameter; while the increase of the micro-pit spacing caused the thrust and torque to decrease. When the depth of the micro-pit increased, the thrust and torque decreased first and then increased, and we found that the effect of micro-pit spacing and micro-pit depth on force and torque is insignificant.

[发布机构] Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin; 300384, China^1;Tianjin University of Technology, 391 Binshui West Road, Tianjin, Xiqing District; 300384, China^2

[效力级别] 原子能学

[关键词] Bone drilling;Cortical bone;Drilling thrust;Force and torques;Micro-structure parameters;Three dimensional finite element model;Thrust and torques;Tool surfaces