Load-Oriented Nonplanar Additive Manufacturing Method for Optimized Continuous Carbon Fiber Parts

Area of Science:

• Materials Science
• Manufacturing Engineering
• Additive Manufacturing

Background:

• Additive manufacturing (AM) of carbon-fiber-reinforced polymer (CFRP) parts using fused deposition modeling (FDM) is gaining traction.
• Traditional methods struggle with complex geometries and mold costs.
• Existing AM slicing methods are often planar, limiting load-oriented fiber placement.

Purpose of the Study:

• To develop and validate a nonplanar slicing approach for CFRP additive manufacturing.
• To enable load-oriented fiber placement along principal stress directions.
• To overcome limitations of planar slicing in complex CFRP part fabrication.

Main Methods:

• A nonplanar slicing strategy based on principal stress directions.
• Generation of optimized nonplanar layers for path planning.
• Adaptive support material generation for arbitrary geometries.
• Continuous path planning and post-processing for manufacturing instructions.
• Experimental verification on a multi-axis robotic 3D printer.

Main Results:

• Demonstrated viability of nonplanar slicing for CFRP AM.
• Optimized fiber orientation along stress paths achieved.
• Minimized weak interlayer adhesion effects through layer orientation.
• Successful fabrication of complex CFRP parts using the developed method.

Conclusions:

• The proposed nonplanar slicing approach significantly advances CFRP additive manufacturing.
• Enables fabrication of high-performance CFRP parts with complex geometries.
• Paves the way for wider utilization of AM for advanced composite materials.