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cutting Behavior of Cortical bone in Different bone Osteon cutting Angles and Depths of Cut

Chinese Journal of Mechanical Engineering 2022年第3期35卷 80-91页

作者： Yuanqiang Luo Yinghui Ren Yang Shu Cong Mao Zhixiong Zhou Z.M.Bi College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China Hunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment Changsha University of Science and TechnologyChangsha 410114China Department of Civil and Mechanical Engineering Purdue University Fort WayneFort WayneIN 46805USA

Cortical bone is semi-brittle and anisotropic,that brings a challenge to suppress vibration and avoid undesired fracture in precise cutting process in *** this paper,a novel analytical model is proposed to represent cortical bone cutting *** model is utilized to predict the chip formations,material removal behavior and cracks propagation under varying bone osteon cutting angles and *** of orthogonal cutting experiments were conducted on cortical bone to investigate the impact of bone osteon cutting angle and depth of cut on cutting force,crack initialization and *** observed chip morphology highly agreed with the prediction of chip formation based on the analytical *** curly,serrated,grainy and powdery chips formed when the cutting angle was set as 0°,60°,90°,and 120°,*** bone were removed dominantly by shearing at a small depth of cut from 10 to 50μm,and by a mixture of pealing,shearing,fracture and crushing at a large depth of cut over 100μm at different bone osteon ***,its fracture toughness was calculated based on measured cutting *** is found that the fluctuation of cutting force is suppressed and the bone material becomes easy to remove,which attributes to lower fracture toughness at bone osteon cutting angle 0°.When the cutting direction develops a certain angle to bone osteon,the fracture toughness increases then the crack propagation is inhibited to some extent and the fluctuation of cutting force comparatively *** is a theoretical and practical significance for tools design and operational parameters choice in surgeries.

关键词： bone cutting surgery Orthogonal cutting models Anisotropic materials Chip formation Crack initialization and propagation Fracture toughness

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