Carbon Reinforced 3-d Prints

thingiverse

This project demonstrates the combination of carbon fiber's immense strength with 3D printing's design versatility. The reinforcing methods are simple, requiring no equipment or experience. Unidirectional carbon epoxy has a tensile strength of about 150Kg per sq mm. Carbon is extremely strong and rigid but can snap under overload; Aramid (Kevlar) is nearly as strong in tension, has low rigidity, and is more durable. A video demonstrates various reinforcement methods, such as grooves or lugs for guiding fibers correctly. The project presents examples of reinforced parts, including a truss that tested at 120kg, a pulley block body reinforced with aramid fiber weighing just 7gm and breaking at 1200kg under a car jack's force, and a 25mm tee joint that proved stronger than the aluminum tube it replaced. Designing and printing fully printed tee joints were challenging but could be improved using soluble PVA. Experimentation with winding fibers is crucial for successful reinforcement. The project requires an initial investment of $50 to $100 for materials, including carbon and aramid tow, epoxy resin, artist brushes, gloves, acetone, and furniture wax. Precautions, such as measuring and mixing epoxy carefully and curing it for 24-36 hours, are essential.