LIU et al.: LAMINATED COMPOSITE 4849 Acknowledgements-This work was co-supported by the 10. LIu, Y. M, Mitchell, T. E. and wadley, H.N. G, Acta Defense Advanced Research Projects Agency (DARPA mater.,1997,45(10,3981 through a Research Initiative coordinated by the Uni M, He, Y, Chu, F, Mitchell, T. E and Wadl Califomia at Santa Barbara under ONR Contract No. No0014-. H. N. G.,J. Am. Ceram. Soc., 1997, 80(1), 14 92-J-1808(Drs S. Fishman and W. Coblinz, Program 12. Mall,S and Kim,R. Y, Composites. 1992, 23(4), 215 Managers)and the US Department of Er Ofice of Basic 13. Cady, C, Heredia, F. E and Evans, A. G.,J. Am. Ceram Inc)for supplying the material, and Drs D. T. Queheillalt and 14. Larsen, D. C, Coming Inc, personal communication C.T.Herakovich, both of the University of Virginia, for help- 15. Auld,B A Acoustic Fields and Waves in Solids. Krieger 16. Christensen, R. M, Mechanics of Composite Materials 17. Huang, Y, Hu, K. X and Chandra, A, Int J. 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Dutton, R. E, Pagano, N J and Kim, R.Y.,J.Am. Ceram. 7. Drissi-Habti, M, Scripta metall. mater., 1995, 33, 967. Soc,1996,794),865 8. Beyerle, D. S, Spearing, S. M, Zok, F. W. and Evans, A. 24. Clarke, D. R, University of California at Santa Barbara, G.,J.Am. Ceram. Soc,1992,75(10,2719 rsonal communication 9. Baste, S, Guerjouma, R E and Audoin, B, Mech. Mater, 25. Herakovich, C. T, University of Virginia, personal com- 1992.14.15LIU et al.: LAMINATED COMPOSITE 4849 Acknowledgements—This work was co-supported by the Defense Advanced Research Projects Agency (DARPA) through a Research Initiative coordinated by the University of California at Santa Barbara under ONR Contract No. N00014- 92-J-1808 (Drs S. Fishman and W. Coblinz, Program Managers) and the US Department of Energy, Office of Basic Energy Sciences. We are grateful to Mr D. C. Larsen (Corning Inc.) for supplying the material, and Drs D. T. Queheillalt and C. T. 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