Direct-write 3D printing of composite materials with magnetically aligned discontinuous reinforcement

Joshua J. Martin; Andrew Caunter; Amy Dendulk; Scott Goodrich; Ryan Pembroke; Dan Shores; Randall M. Erb

doi:10.1117/12.2263215

18 May 2017 Direct-write 3D printing of composite materials with magnetically aligned discontinuous reinforcement

Joshua J. Martin, Andrew Caunter, Amy Dendulk, Scott Goodrich, Ryan Pembroke, Dan Shores, Randall M. Erb

Proceedings Volume 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX; 101941I (2017) https://doi.org/10.1117/12.2263215
Event: SPIE Defense + Security, 2017, Anaheim, CA, United States

Abstract

Three-dimensional (3D) printing of fiber reinforced composites represents an enabling technology that may bring toughness and specific strength to complex parts. Recently, direct-write 3D printing has been offered as a promising route to manufacturing fiber reinforced composites that show high specific strength. These approaches primarily rely on the use of shear-alignment during the extrusion process to align fibers along the printing direction. Shear alignment prevents fibers from being oriented along principle stress directions of the final designed part. This paper describes a new direct-write style 3D printing system that incorporates magnetic fields to actively control the orientation of reinforcing fibers during the printing of fiber reinforced composites. Such a manufacturing system is fraught with complications from the high shear dominated alignment experienced by the fibers during extrusion to the slow magnetic alignment dynamics of fibers in viscous media. Here we characterize these issues and suggest effective operating windows in which magnetic alignment is a viable approach to orienting reinforcing particles during direct-write 3D printing.

Citation Download Citation

Joshua J. Martin, Andrew Caunter, Amy Dendulk, Scott Goodrich, Ryan Pembroke, Dan Shores, and Randall M. Erb "Direct-write 3D printing of composite materials with magnetically aligned discontinuous reinforcement", Proc. SPIE 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX, 101941I (18 May 2017); https://doi.org/10.1117/12.2263215

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