Title: Investigation of Fiber Content, Fiber Direction, and Surface Characteristics of the Different Surface Angles of Additively Manufactured Composite Relative to the Printing Direction

Authors: Sungjun Choi, Garam Kim, Eduardo Barocio, Harry. K Lee

DOI: 10.33599/nasampe/c.23.0059

Abstract: Extrude Deposition Additive Manufacturing (EDAM) is a widely used 3D printing technology for thermoplastic composite materials. Pelletized composite materials are melted in an extruder and deposited layer by layer onto a building plate through a printing nozzle. In the printing process, the majority of fibers align with the printing direction. One of the significant applications of 3D printed composites is for building composite part manufacturing tools. The surface characteristics of the tool play an important role in determining its durability, the surface finish quality of composite parts, and the required demolding force for composite part manufacturing. The orientation of the fiber on the tool surface changes with the tool surface angle relative to the printing direction. The surface characteristics influenced by the fiber orientation can vary depending on the surface angle relative to the printing direction. Therefore, understanding the surface properties resulting from different surface angles is essential. In this study, an acrylonitrile butadiene styrene (ABS) composite block filled with 20% carbon fiber by weight was printed using EDAM technology. Surface property test specimens were cut along different planes (1&2 plane, 2&3 plane, and 1&3 plane while 1-printing direction, 2-traverse direction, and 3-stacking direction) and observed under a microscope for fiber content and orientation. The specimens were then finished using a computer numerical control (CNC) milling machine to achieve the desired testing surface. Surface characteristics critical for composite tooling applications, such as surface hardness, abrasion resistance, roughness, and friction, were evaluated.

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Conference: CAMX 2023

Publication Date: 2023/10/30

SKU: TP23-0000000059

Pages: 15

Price: $30.00