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Formability of TUFF Composite Blanks


Title: Formability of TUFF Composite Blanks

Authors: Shridhar Yarlagadda, Suresh Advani, Joseph Deitzel, Dirk Heider, Dan Molligan, David Roseman, Pavel Simacek, John Tierney,and John W. Gillespie, Jr.

DOI: 10.33599/nasampe/s.19.1606

Abstract: Under the Defense Advanced Research Projects Agency (DARPA) Tailorable Feedstock for Forming (TFF) program, the University of Delaware - Center for Composite Materials (UD-CCM) led-team proposed to develop a manufacturing process and pilot facility to produce novel discontinuous carbon fiber composite feedstock for forming, with the potential to revolutionize the use of composite materials in military platforms, as a cost-effective replacement for small complex geometry metal parts (>2 sq. m.). The TuFF (Tailored Universal Feedstock for Forming) feedstock consists of a highly aligned discontinuous carbon fiber preform in thin-ply format, which can be converted to dry preforms for thermoset infusion, thermoset prepreg blanks or thermoplastic blanks for composite forming. Forming demonstrations have shown metal-like formability under vacuum forming conditions for complex geometries. In-plane as well as bi-axial stretch >40% has been demonstrated in both longitudinal (along fiber direction) and transverse (90 degrees to fiber direction) deformation modes for unidirectional and cross-ply composite blanks.

References: 1. Krone JR, Walker JH. Processing thermoplastic advanced composites. Plast Technol 1986;32(12):61–5. 2. Okine RK. Analysis of forming parts from advanced thermoplastic composite sheet materials. SAMPE J 1989; 25(3):9–19. 3. De Luca P, Lefébure P, Pickett AK. Numerical and experimental investigation of some press forming parameters of two fibre reinforced thermoplastics: APC2-AS4 and PEI-CETEX. Compos Part A: Appl Sci Manuf 1998;29(1-2):101–10. 4. Gereke T, Döbrich O, Hübner M, Cherif C. Experimental and computational composite textile reinforcement forming: a review. Compos Part A: Appl Sci Manuf 2013;46(1):1–10. 5. Hou M. Stamp forming of fabric-reinforced thermoplastic composites. Polym Compos 1996;17(4):596–603. 6. Mallon PJ, Ó Brádaigh CM, Pipes RB. Polymeric diaphragm forming of complex curvature thermoplastic composite parts. Composites 1989;20(1):48–56. 7. Haanappel SP, ten Thije R, Akkerman R. Forming predictions of UD reinforced thermoplastic laminates. In: 14th European conference on composite materials. ECCM 2010; 2010. 8. Chang, Y. & Pratte, J. F. , LDF thermoplastic composites technology, Journal of Thermoplastic Composite Materials, v 4, n 3, Jul, 1991, p 227-252 9. Perrella, Andy P., Designing aerospace structures with Du Ponts LDF thermoplastic composites, National SAMPE Technical Conference, v 21, Advanced Materials: The Big Payoff, 1989, p 705-719 10. Sun, C.T., Chung, I. & Chang, I.Y., Modeling of elastic-plastic behavior of LDF and continuous fiber reinforced AS-4/PEKK composites, Composites Science and Technology, v 43, n 4, 1992, p 339-345 11. Jegley, D. C., Santare, M. H., Curved beams made from long discontinous fiber (LDF) material, NASA Technical Memorandum, n 4331, Feb, 1992, p 80 12. Coffin, D.W., Creasy, T.S., Shuler, S.F. & Simacek, P., More on the rheological behavior of collimated fiber thermoplastic composite materials, Proceedings of the American Society for Composites, 1992, p 159-167 13. Altan, M.C., Advani, S.G., Gueceri, S.I. & Pipes, R.B., On the description of the orientation state for fiber suspensions in homogeneous flows, Journal of Rheology, v 33, n 7, Oct, 1989, p 1129-1155 14. Vaidya, U. K., and K. K. Chawla. ""Processing of fibre reinforced thermoplastic composites."" International Materials Reviews 53.4 (2008): 185-218. 15. Creasy, Terry S., and Suresh G. Advani. ""A model long-discontinuous-fiber filled thermoplastic melt in extensional flow."" Journal of non-newtonian fluid mechanics 73.3 (1997): 261-278. 16. H. Yu, K.D. Potter, M.R. Wisnom, A novel manufacturing method for aligned discontinuous fibre composites (High Performance-Discontinuous Fibre method), Composites Part A: Applied Science and Manufacturing, Volume 65, 2014, Pages 175-185 17. Shridhar Yarlagadda, Joseph Deitzel, Dirk Heider, John Tierney, and John W. Gillespie Jr., “Tailorable Universal Feedstock for Forming (TuFF): Overview and Performance”, SAMPE Conference Proceedings. Charlotte, NC, May 20-23, 2019. 18. Dirk Heider, John Tierney, Mohamed A. Henchir, Verena Gargitter, Shridhar Yarlagadda, John W. Gillespie, Jr., Jessica Sun, Jennifer M. Sietins, Dan Knorr, Microstructural Evaluation of Aligned, Short Fiber TuFF Material, SAMPE Conference Proceedings. Charlotte, NC, May 20-23, 2019. 19. Schuster, J., and K. Friedrich. ""Modeling of the mechanical properties of discontinuous-aligned-fiber composites after thermoforming."" Composites science and technology 4.57 (1997): 405-413. 20. Šimáček, P., and S. G. Advani. ""A micromechanics model to predict extensional viscosity of aligned long discontinuous fiber suspensions."" International Journal of Material Forming (2018): 1-15.

Conference: SAMPE 2019 - Charlotte, NC

Publication Date: 2019/05/20

SKU: TP19--1606

Pages: 15

Price: FREE

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