Fiber microbuckling, a compressive failure mechanism in unidirectional fiber-reinforced composites, was studied in a model system composed of a single polyamide fiber in a silicone matrix. The transparent matrix permitted direct observation of fiber microbuckling during compression. In all instances the shape of the microbuckling was planar and sinusoidal. The effects of fiber diameter, fiber modulus, and matrix modulus on the critical wavelength were observed. Excellent agreement with predictions from the stability analyses of Sadowsky et al. and Darby and Kanellopoulos was obtained.
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References
1.
1. Rosen, B. W.1965. "Mechanics of Composite Strengthening,"Fiber Composites, Metals Park, Ohio: American Society for Metals, pp. 37-75.
2.
2. Dale, W. C. and E. Baer. 1974. "Fiber-Buckling in Composite Systems: A Model for the Ultrastructure of Uncalcified Collagen Tissues,"Journal of Materials Science, 9:369-382.
3.
3. Argon, A. S.1972. "Fracture of Composites,"Treatise on Materials Science and Technology, Vol. 1, H. Liebowitz, ed., New York: Academic Press, pp. 79-114.
4.
4. Lankford, J.1991. "Compressive Damage and Failure at High Loading Rates in Graphite Fiber-Reinforced Polymeric Matrix Composites,"Ceramic Transactions, Vol. 19, M. D. Sacks, ed., Westerville, Ohio: American Ceramic Society, pp. 553-563.
5.
5. Timoshenko, S.1936. Theory of Elastic Stability, New York: McGraw-Hill.
6.
6. Sadowsky, M. A., S. L. Pu and M. A. Hussain. 1967. "Buckling of Microfibers,"Journal of Applied Mechanics, 34:1011-1016.
7.
7. Darby, M. I. and V. N. Kanellopoulos. 1987. "Theory of Fiber Buckling in Carbon-Fiber Reinforced Composites,"Journal of Physics D: Applied Physics, 20:298-302.
