Abstract
A technique for preparing model Functionally Gradient Materials (FGM) using polyester resin and cenospheres is developed. The cenosphere volume fraction in the polyester matrix is continuously varied through a buoyancy assisted casting process. FGMs having cenosphere volume fraction varying from 0 to 0.45 over a length of 250 mm are prepared. The overall properties of the FGM are varied by adding plasticizer to the polyester matrix. The physical, elastic and fracture properties of the prepared FGMs are evaluated as a function of location to generate the property profiles. The results of the material characterization indicate that, the quasi-static and dynamic modulus of the material increases and the material density decreases in the direction of increasing cenosphere volume fraction. The quasi-static fracture toughness increases up to a certain volume fraction of cenospheres and then decreases. Fractographic analyses of the fractured specimens indicate a change in the fracture mechanism as the cenosphere volume fraction increases. Estimate of the composite modulus using the Halpin-Tsai model with porosity correction matches closely with the test results.
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References
M. Niino, T. Hirai and R. Watanabe, Journal of Japanese Society of Composite Materials 13(1) (1987) 257.
Y. Fukui, JSME International Journal 34(1) (1991).
Y. Fukui, H. Kinoshita and K. Nakanishi, ibid. 35(1) (1992) 95–101.
F. Erdogan, Composites Engineering 5(7) (1995) 753–770.
K. S. Ravichandran, Material Science and Engineering A201 (1995) 269–276.
V. Parameswaran and A. Shukla, J. of Mater. Sci. 33 (1998) 3303–3311.
P. R. Marur and H. V. Tippur, Journal of Testing and Evaluation., to appear.
H. Kolsky, “StressWaves in Solids” (Dover Publications, New York, 1963).
K. Srivastava and P. S. Shembekar, J. of Mater. Sci. 25 (1990) 3513–3516.
B. D. Agarwal and L. J. Broutman, “Analysis and Performance of Fiber Composites” (Wiley International, 1990).
S. Bazhenov, Polymer Engineering and Science 35(10) (1995) 813–822.
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Parameswaran, V., Shukla, A. Processing and characterization of a model functionally gradient material. Journal of Materials Science 35, 21–29 (2000). https://doi.org/10.1023/A:1004767910762
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DOI: https://doi.org/10.1023/A:1004767910762