Abstract
Flexural strength, crack-density evolution, work of fracture, and critical strain energy release rates were measured for wet and dry specimens of the Strombus gigas conch shell. This shell has a crossed-lamellar microarchitecture, which is layered at five distinct length scales and can be considered a form of ceramic “plywood”. The shell has a particularly high ceramic (mineral) content (99.9 wt%), yet achieves unusually good mechanical performance. Even though the strengths are modest (of the order 100 MPa), the laminated structure has a large strain to fracture, and a correspondingly large work of fracture, up to 13 kJ m−2. The large fracture resistance is correlated to the extensive microcracking that occurs along the numerous interfaces within the shell microstructure. Implications of this impressive work of fracture for design of brittle laminates are considered.
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J. D. Taylor and M. Layman, Palaeontology 15 (1972) 73.
A. J. Kohn, E. R. Meyers and V. R. Meenakashi Proc. Nat. Acad. Sci. 76 (1979) 3406.
V. J. Laraia and A. H. Heuer, in “Proceedings of the 11th Risø International Symposium of Metallurgy and Materials Science, edited by J. J. Bentsen, J. B. Bilde-Sørensen, N. Christiansen, A. Horsewell, and B. Ralph (Risø National Laboratory, Denmark, 1990) p. 79.
N. V. Wilmot, D. J. Barber, J. D. Taylor and A. L. Graham, Philos. Trans. R. Soc. Lond. B 337 (1992) 21.
S. Weiner, Am. Zool 24 (1984) 945.
J. D. Currey and A. J. Kohn, J. Mater. Sci. 11 (1976) 1615.
A.P. Jackson, J. F. V. Vincent and R. M. Turner, Proc. R Soc Lond. B 234 (1988) 415.
V. J. Laraia and A. H. Heuer, J. Am. Ceram. Soc. 72 (1989) 2177.
J. Cook and J. E. Gordon, Proc. R. Soc. A. 282 (1964) 508.
A. G. Evans, F. W. Zok and J. Davis, Compos. Sci. Technol. 42 (1991) 3.
C. A. Folsom, F. W. Zok, F. F. Lange and D. B. Marschall, J. Am. Ceram. Soc. 75 (1992) 2969.
W. J. Clegg, K. Kendall, N. McN, Alford, T. W. Button and J. D. Birchall, Nature 347 (1990) 455.
M.-Y. He and J. W. Hutchinson, J. Appl. Mech. 56 (1989) 270.
G. J. Vermeij, “A Natural History of Shells” (Princeton University Press, New Jersey, 1993) p. 102.
P. G. Charalambides, H. C. Cao, J. Lund and A. G. Evans, Mech. Mater. 8 (1990) 269.
J. D. Currey and J. D. Taylor, J. Zool. Lond. 173 (1974) 395.
A. P. Jackson, J. F. V. Vincent and R. M. Turner, J. Mater. Sci. 25 (1990) 3173.
J. W. Hutchinson and Z. Suo, Adv. Appl. Mech. 29 (1990) 134.
H. G. Tattersall and G. Tappin, J. Mater. Sci. 1 (1966) 296.
D. Broek, “Elementary Fracture Mechanics” (Kluwer Academic, Dordrecht, 1991) p. 123.
P. G. Charalambides, J. Lund, A. G. Evans and R. M. McMeeking, J. Appl. Mech. (Trans.ASME) 56 (1989) 77.
S. A. Wainwright, W. D. Biggs, J. D. Currey and J. M. Gosline, “Mechanical Design of Organisms” (Princeton University Press, Princeton, NJ, 1976) p. 167.
S. P. Timoshenko and J. M. Gere, “Mechanics of Materials” (Van Nostrand, New York, 1972) p. 309.
P. Wawrzynek and A. R. Ingraffea, “FRANC 2-D: A Two-dimensional Crack Propagation Simulator” (NASA Contractors Report 4572, Cornell University, 1994).
H. Tada, P. C. Paris and G. R. Irwin, “The Stress Analysis of Cracks Handbook” (Paris Productions, MO, 1985).
A. C. Kimber and J. G. Keer, J. Mater. Sci. Lett. 1 (1982) 353.
F. W. Zok and S. M. Spearing, Acta Metall. Mater. 40 (1992) 2033.
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Kuhn-Spearing, L.T., Kessler, H., Chateau, E. et al. Fracture mechanisms of the Strombus gigas conch shell: implications for the design of brittle laminates. JOURNAL OF MATERIALS SCIENCE 31, 6583–6594 (1996). https://doi.org/10.1007/BF00356266
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DOI: https://doi.org/10.1007/BF00356266