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Effect of Cutting Tool Geometry on Material Removal in Orthogonal Cutting of Unidirectional Cf/SiC Composites: A Fracture-Energy-Based Interpretation
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DOI：10.1016/j.jeurceramsoc.2026.118597.png)
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Abstract
En 中文
Machining carbon fiber reinforced silicon carbide (Cf/SiC) composites is associated with high cutting forces, surface damage, and rapid tool wear due to their brittle and anisotropic nature. A clear understanding of fracture-controlled material removal is therefore essential for improving machining performance. This study investigates the influence of tool geometry on the orthogonal cutting behavior of unidirectional Cf/SiC composites. Synchronous image–force acquisition is employed to directly capture chip formation, while post-machining surface characterization provides complementary evidence of fracture evolution. As expected, the results indicate that material removal is predominantly governed by crack initiation and propagation rather than continuous plastic shear deformation. At a 0° fiber orientation, decreasing the rake angle induces a transition from bending-dominated (Mode I) fracture to compression-induced shear (Mode II) fracture. At 45° and 90°, removal is mainly controlled by transverse fiber shear fracture and interfacial sliding, whereas at 135° bending-related fracture becomes more significant under compressive conditions. Clearance angle and tool edge radius primarily modify local contact stresses but do not fundamentally alter the fracture-dominated removal mechanism.
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IF:
6.2
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1.7W
Citations:
5.1W
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