The static and fatigue characteristics of AS4/PEEK laminates were investigated. Coupons machined from plaques obtained using various molding conditions were tested under monotonic tensile, short beam shear, and three-point flexural fatigue loading. Varying the manufacturing conditions was seen to significantly affect the interlaminar shear strength of the composites, with higher values obtained for the highly crystalline specimens. While for multidirectional laminates the manufacturing conditions seemed to mostly affect the yield stress and the strain and stress to failure, these conditions seem to have only a minor effect on the tensile properties for specimens with unidirectional configurations. The results obtained under fatigue loading, although preliminary, did not show significant dependence on manufacturing parameters.
1. Vu-Khanh, T. and Denault, J.1993. “Effect of Molding Parameters on the Interfacial Strength in PEEK/Carbon Composites”J. Reinf. Plast. Comp., 12:916-931.
2.
2. Vu-Khanh, T. and Denault, J.1991. “Processing-Structure-Property Relations in PEEK/Carbon Composites Made from Comingled Fabric and Prepreg,”J. Therm. Comp. Mat., 4:363-376.
3.
3. Jar, P.-Y. B. and Kausch, H.-H.1994. “The Influence of Moulding Conditions on Delamination Behaviour of Carbon-Fibre/PEEK Composites,”Comp. Sci. Tech., 52:349-359.
4.
4. Jar, P.-Y. B., Mulone, R., Davies, P. and Kausch, H.-H.1993. “A Study on the Effect of Forming Temperature on the Mechanical Behaviour of Carbon-Fibre/PEEK Composites,”Comp. Sci. Tech., 46:7-19.
5.
5. Davies, P., Cantwell, W.J., Jar, P.-Y., Richard, H., Neville, D.J. and Kausch, H.-H.1991. “Cooling Rate Effects in Carbon Fiber/PEEK Composites,”Composite Materials: Fatigue and Fracture (Third Volume), ASTM STP 1110, T. K. O’Brien, Ed., pp. 70-88.
6.
6. Tregub, A., Harel, H., Marom, G. and Migliaresi, C.1993. “The Influence of Thermal History on the Mechanical Properties of Poly (ether ether ketone) Matrix Composite Materials,”Comp. Sci. Tech., 48:185-190.
7.
7. Tregub, A., Harel, H. and Marom, G.1994. “Thermal Treatment Effects on the Crystallinity and the Mechanical Behaviour of Carbon Fiber-Poly(ether ether ketone) Composites,”J. Mat. Sci. Let., 13:329-331.
8.
8. Seferis, J.C.1986. “Polyetheretherketone (PEEK): Processing-Structure and Properties Studies for a Matrix in High Performance Composites,”Polym. Comp., 7:158-169.
9.
9. Velisaris, C.N. and Seferis, J.C.1988. “Heat Transfer Effects on the Processing-Structure Relationships of Polyetheretherketone (PEEK)-Based Composites,”Polym. Eng. Sci., 28:583-591.
10.
10. Henaff-Gardin, C. and Lafarie-Frenot, M.C.1992. “Fatigue Behaviour of Thermoset and Thermoplastic Cross-Ply Laminates,”Composites, 23:109-116.
11.
11. Lafarie-Frenot, M.C. and Touchard, F.1994. “Comparative In-Plane Shear Behaviour of Long-Carbon-Fibre Composites with Thermoset or Thermoplastic Matrix,”Comp. Sci. Tech.,52:417-425.
12.
12. Gamstedt, E.K. and Talreja, R.1999. “Fatigue Damage in Unidirectional Carbon-Fibre-Reinforced Plastics,”J. Mat. Sci., 34:2535-2546.
13.
13. Curtis, D.C., Moore, D.R., Slater, B. and Zahlan, N.1988. “Fatigue Testing of Multi-Angle Laminates of CF/PEEK,”Composites, 19:446-452.
14.
14. Curtis, D.C., Davies, M., Moore, D.R. and Slater, B.1991. “Fatigue Behavior of Continuous Carbon Fiber-Reinforced PEEK,”Composite Materials: Fatigue and Fracture (Third Volume), ASTM STP 1110, T.K. O’Brien, Ed., pp. 581-595.
15.
15. Buggy, M. and Dillon, G.1991. “Flexural fatigue of carbon fibre-reinforced PEEK laminates,”Composites, 22:191-198.
16.
16. Dillon, G. and Buggy, M.1995. “Damage Development during Flexural Fatigue of Carbon Fibre-Reinforced PEEK,”Composites, 26:355-370.
17.
17. Trotignon, J.-P. and Verdu, J. 1993. “Comparative Study of Flexural Fatigue Properties of Epoxy and PEEK Composites and Matrices,”Advanced Composites’93, International Conference on Advanced Composites, T. Chandra and A.K. Dhingra Eds., pp. 569-572.
18.
18. Lafarie-Frenot, M.C., Denault, J., Goupillaud, I. and El Kadi, H. 1996. “Effect of Matrix Morphology on Fatigue Behaviour of Carbon/PEEK Composites,”11th European Conference on Fracture, Poitier, France.
19.
19. Denault, J., Lafarie-Frenot, M.C., Goupillaud, I. and El Kadi, H.1996. “Effect of Processing Conditions on Fatigue Behaviour of Carbon/PEEK Composites,”Composites’96, Boucherville, Canada, pp. 461-469.
20.
20. Blundell, D.J. and Osborn, B.N.1983. “The Morphology of Poly(aryl-ether-ether-ketone),”Polymer, 24:953-958.
21.
21. Vu-Khanh T., Denault J. 1991. “Processing and Properties of PEEK/Carbon Composites,”Proceeding of the Int. SAMPE Symp., San Diego, California, April 15-18, 36:1732.
22.
22. Wunderlich, B.1976. Macromolecular Physics, Academic Press, New York.
23.
23. Binsbergen, F.L.1977. J. Polym. Sci., Polym. Symp. Ed., 59:11.
24.
24. Morgan, L.B.1954. J. Appl. Chem., 4:160.
25.
25. McLaren, J.V.1963. Polymer, 4:175.
26.
26. Waddon, A.J., Hill, M.J., Keller, A. and Blunde, D.J.1987. J. Mater. Sci., 22:1773.
27.
27. Denault J., Vu-Khanh T.1992. “Crystallization and Fiber/Matrix Interaction during the Molding of PEEK/Carbon Composites,”Polymer Composites, 13:361-371.
28.
28. Chapman, T.J., Gillespie Jr., J.W., Manson, J.-A.E., Pipes, R.B. and Seferis, J.C. 1988. “Thermal Skin/Core Residual Stresses Induced during Cooling of Thermoplastic Matrix Composites,”Proc. Am. Soc. Comp. 3rd Techn. Conf., pp. 449-458.
29.
29. Denault, J. and Vu-Khanh, T.1993. “Fiber-Matrix Interaction in Carbon/PEEK Composites,”J. Therm. Comp. Mat., 6:190-204.
30.
30. Jen, M.-H.R. and Lee, C.-H.1998. “Strength and Life in Thermoplastic Composite Laminates under Static and Fatigue Loads. Part I: Experimental,”Int. J. Fatigue, 9:606-615.
31.
31. Jen, M.-H.R. and Lee, C.-H.1998. “Strength and Life in Thermoplastic Composite Laminates under Static and Fatigue Loads. Part II: Formulation,”Int. J. Fatigue, 9:617-629.
