A Study on Chip Curling and Breaking

Cutting behavior of flax fibers as reinforcement of biocomposite structures involving multiscale hygrometric shear

“…This indicates an important modification on the tribo-mechanical properties of flax/PLA composites due to the water uptake. Indeed, in the context of machining science, the cause of chip curling is due to the bending moment formed at the deformation zone, owing to the non-collinearity of the resultant force on the rake face and the resisting force on the shear plane [50,51]. The bending moment required to change the radius of the chip curvature is called the "fully plastic bending moment" (𝑀 𝑓𝑝 ) and it is given by the following the equation ( 3) where 𝜎 0 is the flow stress, 𝑏 is the chip width, and 𝑡 𝑐 is the chip thickness [50].…”