Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Voids and Continuous Fibers in Extrusion Deposition Additive Manufacturing of Composite Materials" By Jorge A. Ramirez Purdue MSE Ph.D. Preliminary Exam Advisor: Professor R. Byron Pipes ABSTRACT Extrusion Deposition Additive Manufacturing (EDAM) is a layer-by-layer three-dimensional manufacturing process. This process consists of the liquefaction and pressurization of pelletized material inside an extruder, the material melt is then deposited onto a build platform to create a physical object. The incorporation of an extruder allows EDAM to process a wide range of materials. The Composites Manufacturing and Simulation Center (CMSC) at Purdue has explored the use of this technology with highly filled polyphenylene sulfide (PPS) with carbon fibers (50 wt%) for composites tooling applications. Advantages of EDAM in tooling manufacturing include reductions in lead time and cost. In addition, EDAM allows for a high degree of customization and optimization. Properties of EDAM parts are directly dependent on their final microstructure. In this work, I discuss two key microstructural features, voids and fiber orientation state, and how they are dictated by different processing parameters. Lastly, I discuss the implementation of reinforcing continuous fibers with EDAM for rapid fabrication of structural components. Date: Friday, December 1, 2017 Time: 8:00 A.M. Place: IMI 127 School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2200 West Lafayette, IN 47907 765-494-4105