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Abstract

The interlaminar-toughened CFRP composite, T800H/3900-2, has interlaminar resin layers, whose thickness is about 20 mm. The interlaminar layer was evaluated quantitatively using an ultrasonic micro-spectrometer (UMSM) for the determination of the elastic constants, which is quite difficult by other techniques. At first, the composite was ground to remove the outermost CFRP layer, and the interlaminar layer was exposed. Then the acoustic reflection coefficients at a small spot on the surface of the interlaminar layer were measured using the UMSM. The magnitude of the reflection coefficients is related to the properties of the layer. Hence, the elastic constants of the interlaminar layer were obtained appropriately through the fitness of theory to the magnitude of the reflection coefficients. Moreover, the obtained Young’s modulus was compared with that measured by tensile tests.

Keywords

interlaminar-toughened CFRP interlaminar resin layer elastic constants ultrasonic micro-spectroscopy reflection coefficient

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References

1. Odagiri, N. , Muraki, T. and Tobukuro, K. (1988). Proc. 33rd Intern. SAMPE Symp., pp. 272–283.

2. Odagiri, N. , Kishi, H. and Nakae, T. (1991). Proc. Amer. Soc. Composites 6th Technical Conf., pp. 43–52.

3. Ogihara, S. , Takeda, N. and Kobayashi, A. (1998). Adv. Composite Mater., 7: 347–363.

4. Takeda, N. and Ogihara, S. (1998). Composites Part A, 29A: 1545–1552.

5. Achenbach, J.D. , Kim, J.O. and Lee, Y.-C. (1995). Advances in Acoustic Microscopy, Volume 1, Briggs, A. (ed.), New York: PA: Plenum Press, pp. 153–208.

6. Kim, J.O. and Achenbach, J.D. (1993). Review of Progress in QNDE, 12B: 1899–1906.

7. Kim, J.O. , Achenbach, J.D. , Mirkarimi, P.B. , Shinn, M. and Barnett, S.A. (1992). J. Appl. Phys., 72: 1805–1811.

8. Kim, J.O. , Achenbach, J.D. , Mirkarimi, P.B. and Barnett, S.A. (1993). Phys. Rev. B, 48: 1726–1737.

9. Bar-Cohen, Y. , Mal, A.K. and Lih, S.-S. (1993). Materials Evaluation, 51: 1285–1296.

10.

10. Bar-Cohen, Y. , Lih, S.-S. , Mal, A. and Chang, Z. (1998). Review of Progress in QNDE, 17: 1171–1176.

11.

11. Karim, M.R. , Mal, A.K. and Bar-Cohen, Y. (1990). J. Acoust. Soc. Am., 88: 482–491.

12.

12. XU, P.-C. , Mal, A.K. and Bar-Cohen, Y. (1990). Int. J. Engng Sci., 28: 331–346.

13.

13. Okabe, Y. , Takeda, N. , Yanaka, M. and Tsukahara, Y. (1999). IEEE Trans. Ultrason. Ferroelec., Freq. Contr., 46: 1269–1275.

14.

14. Tsukahara, Y. , Nakaso, N. , Ohira, M. and Yanaka, M. (1996). Advances in Acoustic Microscopy, Volume 2. Briggs, A. and Arnold, W. (eds.), New York, PA: Plenum Press. pp. 103–165.

15.

15. Rokhlin, S.I. and Wang, W. (1989). Review of Progress in QNDE, 8B: 1489–1496.

16.

16. Okabe, Y. and Takeda, N. (1997). Proc. Fifth Japan Intern. SAMPE Symp., 1119–1124.

17.

17. Takeda, N. , Niizuma, H. , Ogihara, S. and Kobayashi, A. (1995). Materials System, 14: 73–78. (in Japanese).

18.

18. Nakaso, N. , Ohira, K. , Yanaka, M. and Tsukahara, Y. (1994). IEEE Trans. Ultrason. Ferroelec. Freq. Contr., 41: 494–502.

19.

19. Tsukahara, Y. , Nakaso, N. and Ohira, K. (1991). IEEE Trans. Ultrason. Ferroelec. Freq. Contr., 38: 468–480.

20.

20. Yanaka, M. , Nakaso, N. , Ohira, K. and Tsukahara, Y. (1993). Jpn. J. Appl. Phys., 32: 2547–2549.

21.

21. Nakaso, N. , Tsukahara, Y. and Chubachi, N. (1996). IEEE Trans. Ultrason. Ferroelec. Freq. Contr., 43: 422–427.

22.

22. Mal, A.K. , Xu, P.-C. and Bar-Cohen, Y. (1989). Int. J. Engng Sci., 27: 779–791.

23.

23. Nayfeh, A.H. (1995). Wave Propagation in Layered Anisotropic Media, Amsterdam, PA: Elsevier Science. pp. 178–181.

24.

24. Press, W.H. , Teukolsky, S.A. , Vetterling, W.T. and Flannery, B.P. (1993). Numerical Recipes in C. Cambridge, PA: Cambridge University Press. pp. 408–412.

Quantitative Evaluation of Interlaminar-Toughened CFRP Composite by Ultrasonic Wave Propagation Characteristics

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