In this paper, we present a rapid manufacturing process for the layered fabrication of polymer-based composite parts using short discontinuous fibers as reinforcements. This process uses a UV-laser-based system for the selective solidification of the composite liquid. The primary components of the prototype are: (1) fiber-resin mixing subsystem, (2) composite-liquid deposition subsystem, (3) liquid leveling subsystem, and (4) laser-light delivery subsystem. Axiomatic Design Theory was used to validate the design selected for the experimental embodiment of the process. Extensive microscopic examination of the layered composite parts verified that the prototype system can yield comparable layer quality, in terms of accuracy and uniformity, to that of pure-resin parts made by a photopolymer-based commercial system. Furthermore, mechanical testing of these composite specimens showed up to 60 percent improvement in modulus over the unreinforced layered specimens.

Issue Section:
Research Papers
Topics:
Fiber reinforced composites, Manufacturing, Composite materials, Engineering prototypes, Fibers, Lasers, Resins, Design, Design theory, Mechanical testing, Photopolymers, Polymers, Solidification, Ultraviolet radiation
1.
Piggott, M. R., Load-Bearing Fibre Composites, Pergamon Press, New York, 1981.
2.
Schmidt, L. D., “How Chrysler is Using Stereolithography Rapid Prototyping Survey Results,” Proc., Fifth Int. Conf. on Rapid Prototyping, June 1994, Dayton, Ohio, pp. 359–370.
3.
Barlage, W. B., Jara-Almonte, C. C., Bagchi, A., Ogale, A. A., and Dodey, R. L., “Fiber/resin Composite Manufacturing Using Solid Freeform Fabrication,” Proc., Third Int. Conf. on Rapid Prototyping, June 1992, Dayton, Ohio, pp. 15–24.
4.
Charan, R., Renault, T., Ogale, A. A., and Bagchi, A., “Automated Fiber-reinforced Composite Prototypes,” Proc. Fifth Int. Conf. Rapid Prototyping, June 1994, Dayton, Ohio, pp. 91–97.
5.
Reiff, D. E., Dorinski, D. W., and Hunt, S. D., “Method of Manufacturing a Three-dimensional Plastic Article,” Motorola Inc., U.S. Patent 5173220, December 1992.
6.
Thomas, S. W., Key, R. D., Fluegel, K. G., Jackson, W. K., Elwell, K. D., and White, G. L., “Method for Manufacturing Fiber-reinforced Parts Utilizing Stereolithography Tooling,” E-Systems Inc., U.S. Patent 5296335, March 1994.
7.
Ogale, A. A., Renault, T., Dooley, R. L., Bagchi, A., and Jara-Almonte, C. C., “3-D Photolithography for Composite Development: Discontinuous Reinforcements,” SAMPE Quarterly, October 1991, pp. 28–38.
8.
Renault, T., and Ogale, A. A., “3-D Photolithography: Mechanical Properties of Glass and Quartz Fiber Composites,” Proc., ANTEC 1992—Conf. SPE, Vol. 1, May 1992, pp. 745–747.
9.
Suh, N. P., The Principles of Design, Oxford University Press, 1990.
10.
Cox
 
H. L.
, “
The Elasticity and Strength of Paper and Other Fibrous Materials
,”
Br. J. Appl. Phys.
, Vol.
3
,
1952
, pp.
72
–
79
.
11.
Piggott
 
M. R.
, “
Short Fiber Polymer Composites: A Fracture-based Theory of Fiber Reinforcement
,”
J. of Composite Materials
, Vol.
28
, No.
7
,
1994
, pp.
588
–
606
.
12.
Sanadi
 
A. R.
, and
Piggott
 
M. R.
, “
Interfacial Effects in Carbon-epoxies: Part 2, Strength and Modulus with Short Random Fibers
,”
J. of Materials Science
, Vol.
20
,
1985
, pp.
431
–
437
.
13.
Zak, G., Chan, A. Y. F., Park, C. B., and Benhabib, B., “Rapid Layered Manufacturing of Short-Fiber-Reinforced Parts: Investigation of the Material Properties,” CSME Forum 1996: 13th Symposium on Engineering Applications of Mechanics, Hamilton, Ontario, May 1996, pp. 458–464.
14.
Zak
 
G.
,
Chan
 
A. Y. F.
,
Park
 
C. B.
, and
Benhabib
 
B.
, “
Viscosity Analysis of Photopolymer and Glass-fibre Composites for Rapid Layered Manufacturing
,”
Rapid Prototyping Journal
, Vol.
2
, No.
3
,
1996
, pp.
16
–
23
.
15.
Renap
 
K.
, and
Kruth
 
J. P.
, “
Recoating Issues in Stereolithography
,”
Rapid Prototyping Journal
, Vol.
1
, No.
3
,
1995
, pp.
4
–
16
.
16.
Fay, J. A., Introduction to Fluid Mechanics, MIT Press, 1994, p. 285.
17.
Renault, T., Ogale, A. A., and Drews, M. J., “Influence of Reinforcements on Photocuring: Photo Dynamic Mechanical Analysis,” ANTEC 93, Society of Plastics Engineers, Conference Proceedings, New Orleans, May 9–13, 1993, pp. 2352–2355.
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