Fiber bending by the cutting tool is one of the dominant causes of fiber pull-out on machined surfaces during CFRP milling. During the bending, the polymer matrix between the fibers is subjected to shear stress resulting in fiber-matrix debonding. The increase in the debonding length causes an increase in the fiber pull-out length. In milling, not all the new surfaces created by tool-workpiece engagement become the machined surface. However, during this process, the strain energy absorbed by the deformed matrix is released into fiber-matrix debonding along the fibers which can cause fiber pull-out on the machined surface. In this study, shear strain energy of polymer matrix due to fiber bending during milling tool-workpiece engagement was calculated with the geometrical relationship between fibers and a cutting edge. We found that the increase in Ra and Rz of the machined surface had clear tendencies to the increase in the calculated energy.
|Publication status||Published - 2022 May 1|
Bibliographical noteFunding Information:
This work was supported by the Technology Innovation Program (20012834, Development of Smart CNC Control System Technology for Manufacturing Equipment) funded by the Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea.
© 2022 Elsevier Ltd
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Civil and Structural Engineering