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Proceedings Paper

Direct-write 3D printing of composite materials with magnetically aligned discontinuous reinforcement
Author(s): Joshua J. Martin; Andrew Caunter; Amy Dendulk; Scott Goodrich; Ryan Pembroke; Dan Shores; Randall M. Erb
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Paper 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.

Paper Details

Date Published: 18 May 2017
PDF: 14 pages
Proc. SPIE 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX, 101941I (18 May 2017); doi: 10.1117/12.2263215
Show Author Affiliations
Joshua J. Martin, Northeastern Univ. (United States)
Andrew Caunter, Northeastern Univ. (United States)
Amy Dendulk, Northeastern Univ. (United States)
Scott Goodrich, Northeastern Univ. (United States)
Ryan Pembroke, Northeastern Univ. (United States)
Dan Shores, Northeastern Univ. (United States)
Randall M. Erb, Northeastern Univ. (United States)

Published in SPIE Proceedings Vol. 10194:
Micro- and Nanotechnology Sensors, Systems, and Applications IX
Thomas George; Achyut K. Dutta; M. Saif Islam, Editor(s)

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