2020-04-24
會議地點：ZOOM平臺：ID 677215949 密碼 34111187
Fiber reinforced polymer composites (FRPC) made with continuous carbon fibers and thermoset polymers exhibit excellent specific mechanical properties (high strength, stiffness, and toughness), thermal stability, and chemical resistance. As such, they are lightweight and energy-efficient structural materials used widely in aerospace, automotive, marine, construction, and energy applications. Additive manufacturing (AM) of lightweight and energy-efficient composites using continuous carbon fibers and thermosetting polymers offers great opportunities for advancing composite manufacturing with design flexibility, low cost, reliability and repeatability. However, to date there has been no AM technique reported to process continuous carbon fibers and thermosetting polymers for direct 3D printing. The main challenge comes from the temperature-dependent viscosity of thermosetting polymers that suffers a significant decrease before the composite suddenly turns into a solid, making it difficult to infuse the polymer into the fiber structure and quickly cure the composite into a solid while retaining the desirable pattern during 3D printing process. In this talk, I will talk about a new design of 3D printing technology, which is recently developed in my lab to address the material, architectural, and technical limitations of present AM approaches in composite printing, and our AM approach enables direct printing of continuous carbon reinforced thermoset composite with net shape and complex architectures in a reliable and repeatable way.
