Defect Analysis and Detection of Cutting Regions in CFRP Machining Using AWJM

Area of Science:

• Materials Science
• Manufacturing Engineering
• Polymer Composites

Background:

• Carbon fiber reinforced polymers (CFRPs) are advanced composite materials with excellent specific properties, driving their adoption across industries.
• Conventional machining of CFRPs can cause material damage, necessitating alternative processing methods.
• Abrasive waterjet (AWJ) machining presents a viable alternative due to its high efficiency, lack of thermal damage, and environmental benefits.

Purpose of the Study:

• To investigate and optimize abrasive waterjet machining parameters for carbon fiber reinforced polymers.
• To minimize characteristic defects such as taper angle and surface striations.
• To identify optimal cutting parameters for high-quality CFRP components.

Main Methods:

• Abrasive waterjet machining was employed to cut CFRP components.
• Key parameters investigated included stand-off distance, traverse feed rate, and abrasive mass flow rate.
• Taper angle and surface roughness were evaluated across different cutting zones (inlet, intermediate, outlet).
• Scanning Electron Microscopy (SEM) was used for microstructural characterization.
• Analysis of Variance (ANOVA) was performed to determine parameter significance.

Main Results:

• Optimal process parameters were identified to minimize taper angle and improve surface quality.
• Distinct cutting regions with varying surface characteristics were identified.
• SEM analysis revealed microstructural features related to the cutting process.
• ANOVA confirmed the statistical significance of selected parameters on cut quality.

Conclusions:

• Abrasive waterjet machining is an effective method for cutting CFRPs with controllable defect levels.
• Optimized parameters significantly reduce taper angle and enhance surface finish.
• This research provides a foundation for precise AWJ processing of advanced composites.