Effects of remolding on mechanical performance are particularly important in post-processing of thermoplastic resin composites. The effects of molding and remold ing temperatures on the Mode-I delamination toughness of APC-2 composites are in vestigated experimentally. It is found that both the initiation and the propagation energies of delamination are influenced by the remolding process, and the effect depends on the previous molding history. In particular, the extent of fiber bridging strongly depends on molding and remolding conditions. Enhanced fiber bridging results in a rising R-curve and unstable crack propagation. The observed behaviors are interpreted from the viewpoint of matrix crystalline morphology.
Xiao, X.R. , J. Denault and T. Vu-Khanh.1992. J. Thermoplastic Composite Materials , 5:64-75.
2.
Blundell, D.J. , R.A. Crick, B. Fife, J. Peacock, A. Kelley and A. Waddon.1989. J. Materials Science , 24:2057-2064.
3.
Lee, Y. and R.S. Porter.1986. Polymer Engineering and Science , 26(9):633-639.
4.
Lustiger, A., F.S. Uralil and G.M. Newaz.1991. Polymer Composites , 11(1):65-75.
5.
Lustiger, A. and G.M. Newaz.1990J. Composite Materials , 24:175-187.
6.
Curtis, P.T., P. Davies, I.K. Partridge and J.P. Sainty.1987. ICCM VI, F. L. Matthews, N. C. R. Buskell, J. M. Hodgkinson and J. Morton, eds., pp. 4.401-4.412.
7.
Vu-Khanh, T. and J. Denault.1991. 36th International SAMPE Symposium , pp. 1732-1746.
8.
Cantwell, W.J. , P. Davies and H.H. Kausch.1990. Composite Structures , 14:151-171.
9.
Talbott, M.F. and G.S. Springer.1987. J. Composite Materials, 21:1056-1081.
10.
Vautey, P.1990. SAMPE Quarterly, pp. 23-28.
11.
Denault, J. and T. Vu-Khanh.1991. J. Thermoplastic Composite Materials, 4.363-376.
12.
Xiao, X.R., S.V. Hoa and K.N. Street.1991Durability of Polymer Based Composite System for Structural Application, A. H. Cardon, G. Verchery, eds., Elsevier, pp. 211-220.
13.
Yar, P.L., W.J. Cantwell, P. Davies and H.H. Kausch.1991. J. Materials Science Letters,10:640-642.
14.
Xiao, X.R. and S.V. Hoa.1989. Theoretical and Applied Fracture Mechanics, 14:49-56.
15.
Davies, P. and M.L. Benzeggagh .1989. "Interlaminar Mode-I Fracture Testing," Apphcation of Fracture Mechanics to Composite Materials, K. Friedrich, ed., Elsevier, Composite Materials Series, 6:81-112.
16.
Berry, J.P.1963. J. Applied Physics , 34:62.
17.
Kanninen, M.F.1973. Int. J. Fract . , 9:83.
18.
Kanninen, M.F.1974. Int. J. Fract . , 10:415.
19.
Vu-Khanh, T.1987. Polymer Composite , 8:331-341.
20.
Dharmarajan, S. and H. McCutchen, Jr.1973. J. Composite Materials, 7:530.
21.
Hahlve, H.V.1962. "Bending of Beams,"Handbook of Engineering Mechanics, W. Flugge, ed., McGraw-Hill.
Russell, A.J.1989. Advances in Adhesively Bonded Joints, MD-Vol. 6, S. Mall, K. M. Liechti and J. R. Vinson, eds., ASME, pp. 87-92.
24.
Bradley, W.L.1989. "Relationship of Matrix Toughness to Interlaminar Fracture Toughness" Application of Fracture Mechanics to Composite Materials, K. Friedrich, ed , Elsevier, Composite Materials Series, 6:159-188.
25.
Wang, H. and T. Vu-Khanh. In press. "Damage Extension in Carbon Fiber/PEEK Crossply Laminates under Low Velocity Impact," J. Composite Materials .
