Abstract
Flexural fatigue behavior was investigated on titanium (Ti-15V-3Cr) metal matrix composites reinforced with cross-ply, continuous silicon carbide (SiC) fibers. The titanium composites had an eightply (0, 90, +45, -45 deg) symmetric layup. Mechanistic investigation of the fatigue behavior is presented in Part I of this series. In Part II, theoretical modeling of the fatigue behavior was performed using finite element techniques to predict the four stages of fatigue deflection behavior. On the basis of the mechanistic understanding, the fiber and matrix fracture sequence was simulated from ply to ply in finite element modeling. The predicted fatigue deflection behavior was found to be in good agreement with the experimental results. Furthermore, it has been shown that the matrix crack initiation starts in the 90 deg ply first, which is in agreement with the experimental observation. Under the same loading condition, the stress in the 90 deg ply of the transverse specimen is greater than that of the longitudinal specimen. This trend explains why the longitudinal specimen has a longer fatigue life than the transverse specimen, as observed in Part I.
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P.K. Liaw, E.S. Diaz, K.T. Chiang, and D.H. Loh,Metall. Trans. A, 1995, vol. 26A, pp. 3225–48.
Y.A. Bahei-El-Din, G.J. Dvorak, and S. Utku:Comput. Struct., 1981, vol. 13, pp. 321–30.
W. Worthem:Flat Tensile Specimen Design for Advanced Composites, Sverdrup Technology, Inc., Cleveland, OH, 1990.
C.A. Bigelow and R.A. Naik: NASA-TM-102728, NASA, Washington, DC, 1990.
C.A. Bigelow and W.S. Johnson: NASA-TM-104131, NASA, Washington, DC, 1991.
A. Levy and J.M. Papazian:Metall. Trans. A, 1990, vol. 21 A, pp. 411- 20.
E.A. Humphrey: Laminate Analysis with Matrix Plasticity (LAMPLAS), Revision 3.1, Material Science Corporation, Philadelphia, PA, 1987.
S. Taguchi and D.M. Byrne:The Taguchi Approach to Parameter Design, Quality Congress Transaction, American Society for Quality Control, Inc. Milwaukee, WI, 1987.
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This article is based on a presentation made in the symposium entitled “Creep and Fatigue in Metal Matrix Composites” at the 1994 TMS/ASM Spring meeting, held February 28–March 3, 1994, in San Francisco, California, under the auspices of the Joint TSM/SMD/ASM-MDS Composite Materials Committee.
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Chiang, K.T., Loh, D.H., Liaw, P.K. et al. Materials characterization of silicon carbide reinforced titanium (Ti/SCS-6) metal matrix composites: Part II. Theoretical modeling of fatigue behavior. Metall Mater Trans A 26, 3249–3255 (1995). https://doi.org/10.1007/BF02669452
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DOI: https://doi.org/10.1007/BF02669452