Loading...

Temperature-dependent cutting physics in orthogonal cutting of carbon fibre reinforced thermoplastic (CFRTP) composite

Ge, J ; Sharif University of Technology | 2024

130 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.compositesa.2023.107820
  3. Publisher: 2024
  4. Abstract:
  5. The global commitment towards reducing carbon emissions drives the implementation of sustainable carbon-fibre-reinforced-thermoplastic composites (CFRTPs). However, the machining of CFRTPs presents challenges due to the material's ductile–brittle composition and sensitivity to machining-induced high temperatures. For the first time, we conducted temperature-controlled orthogonal cutting of CFRTP (using CF/PEKK as a demonstrator) to unveil its temperature-dependent cutting physics. Three representative cutting temperatures, 23 ℃ (ambient temperature),100 ℃ (Tg) and four typical fibre cutting orientations (0°, 45°, 90°, and 135°) have been investigated. The evolution of chip microstructural morphology and surface/subsurface damage have been analysed by advanced microscopy to reveal temperature-dependent material removal mechanisms. The experimental results were elucidated through a novel microscale finite-element-analysis (FEA) model considering thermal softening of the matrix and interface. Results show the transition of the cutting physics with increasing temperature is associated to the degradation of the thermoplastic matrix stiffness/ultimate strength and interface bonding strength and fracture toughness, especially when > Tg. © 2023 The Author(s)
  6. Keywords:
  7. Cutting ; Thermoplastic resin ; Brittle fracture ; Ductile fracture ; Fracture toughness ; Glass transition ; Morphology ; Reinforced plastics ; Stiffness matrix ; Carbon emissions ; Carbon fiber reinforced ; Fiber reinforced thermoplastics ; Finite element analyse ; High-temperature properties ; Highest temperature ; Orthogonal cutting ; Reinforced thermoplastic composites ; Temperature dependent ; Finite element method
  8. Source: Composites Part A: Applied Science and Manufacturing ; Volume 176 , 2024 ; 1359835X (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S1359835X23003962