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Abstract

Tensile fracture behavior of carbon–carbon composites with 0 /90 laminations were examined using double end-notched specimens. In the composites, the volume fractions of the 0 - and 90 -layers were systematically varied to observe the variation of fracture patterns as a function of the shear strength, which increased with the 0 -ply fraction, r. The fracture mode of the notched C–Cs was shown to transfer from Mode I to Mode II when r increased, with the transition occurring at r slightly higher than 0.5. When Mode II fracture occurred, complete notch insensitivity resulted. In contrast, when Mode I fracture was observed, slight notch sensitivity appeared. To evaluate fracture behavior more deeply, compact tension tests were performed. Resultant crack-resistance (R-) curves clearly explain the transition behavior from Mode I to Mode II. The R-curves also suggested that the slight notch sensitivity in the Mode I fracture was due to small scale splitting that appeared near the notch tips.

Keywords

carbon–carbon composite notch sensitivity fracture toughness fracture mode shear band

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References

1. Thomas, C.R. (ed.) (1993). Essentials of Carbon-Carbon Composites, Roy. Soc. Chem, Cambridge, UK.

2. Fitzer, E. and Manocha, L.M. (1998). Carbon Reinforcements and Carbon/Carbon Composites, Springer Verlag Berlin Heidelberg, Germany.

3. Mackin, T.J. Purcell, T.E. , He, M.Y. and Evans, A.G. (1995). J. Am. Ceram. Soc., 78(7): 1719–1728.

4. Heredia, F.E. , Spearing, S.M. , Mackin, T.J. , He, M.Y. , Evans, A.G. , Mosher, P. and Brondsted P. (1994). J. Am. Ceram. Soc., 77: 2817–2827.

5. Kogo, Y. , Hatta, H. , Kawada, H. and Machida, T. (1998). J. Compos. Mater., 32: 1273–1294.

6. Hatta, H. , Kogo, Y. , Asano, H. and Kawada, H. (1999). JSME Inter. J., Series A, 42: 265–271.

7. Goto, K. , Hatta, H. , Takahashi, H. and Kawada, H. (2001). J. Am. Ceram. Soc., 84(6): 1327–1333.

8. Evans, A.G. and Zok, F.W. (1994). J. Mater. Sci., 29: 3857–3896.

9. Turner, K.R. , Speck, J.S. and Evans, A.G. (1995). J. Am. Ceram. Soc., 78(7): 1841–1848.

10.

10. Hatta, H. , Suzuki, K. , Shigei, T. , Somiya, S. and Sawada, Y. (2001). Carbon, 39: 83–90.

11.

11. Okura, A. and Chou, T. (1992). Advanced Composites in Emerging Technologies, 348–353.

12.

12. Iosipescu, N. (1963). Rev. de Mec. Appl., 1: 145–164.

13.

13. Morton, J. , Ho, H. , Tsai, M.Y. and Farley, G.L. (1992). J. Compos. Mater., 26: 708–750.

14.

14. ASTM standard e-399–72.

15.

15. Rybicki, E.F. and Kanninnen, M.F. (1977). Engineering Fracture Mechanics, 9: 931–938.

16.

16. Shivakumar, K.N. , Tan, P.W. and Newman, J.C. (1988). International Journal of Fracture, 36-36.

17.

17. Lars Denk , Hiroshi Hatta , Akihiro Misawa and Satoshi Somiya (2001). Shear Fracture of C/C Composites with Variable Stacking Sequence, Carbon, 39(10): 1505–1513.

18.

18. Hatta, H. , Kogo, Y. , Asano, H. and Kawada, H. (1999). JSME Inter. J., Series A, 42: 265–271.

19.

19. Cook, J. and Gordon, J.E. (1964). Proc. Roy. Soc. Lond., 282(139): 508–520.

Fracture Behavior of Carbon–Carbon Composites with Cross-Ply Lamination

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