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TECHNICAL PAPERS

Durability and Damage Development in Woven Ceramic Matrix Composites Under Tensile and Fatigue Loading at Room and Elevated Temperatures

[+] Author and Article Information
A. Haque, M. Rahman

Center for Advanced Materials, Tuskegee University, Tuskegee, AL 36088

J. Eng. Mater. Technol 122(4), 394-401 (Apr 20, 2000) (8 pages) doi:10.1115/1.1289022 History: Received February 10, 2000; Revised April 20, 2000
Copyright © 2000 by ASME
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References

Levine, S. R., 1992, “Flight-Vehicle Materials, Structures, and Dynamics—Assessment and Future Directions,” Vol. 3, ASME, pp. 1–17.
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Talreja, R., 1990, “Fatigue of Fiber-Reinforced Ceramics,” Structural Ceramics-Processing, Microstructure and Properties,” Proceedings of the 11th Rise International Symposium on Metallurgy and Materials Science, pp. 145–159.
Pastor, M. S., Case, S. W., and Reifsnider, K. L., 1998, “Durability of Ceramic Matrix Composites,” AD-Vol.56, Recent Advances in Mechanics and Aerospace Structures and Materials, pp. 61–66.
Burr, A., Hild, F., and Leckie, F. A., 1997, “Damage, Fatigue, and Failure of Ceramic-Matrix Composites,” Applications of Continuum Damage Mechanics to Fatigue and Fracture, ASTM STP 1315, McDowell, D. L., ed., American Society for Testing and Materials, pp. 83–96.
Holmes,  J. W., 1991, “Tensile Creep Behavior of a Fiber Reinforced SiC/Si3N4 Composites,” J. Mater. Sci., 26, pp. 1808–1814.
Weibelzahl,  W., Mutz,  G., Suttor,  D., and Ziegler,  G., 1999, “Corrosion Stability and Mechanical Properties of Polysilazane—Derived SiCN—Ceramics,” Key Eng. Mater., 161–163, pp. 111–114.
Mahfuz, H., Eltom, K., Das, P. S., Vaidya, U., Sodah, S., and Jeelani, S., 1997, “High Frequency Fatigue of Continuous Silicon Carbide Fiber Reinforced Silicon Nitride (SiC/Si3N4) Matrix Composites,” 29th International SAMPE Technical Conference, pp. 128–141.

Figures

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Ultimate and yield stress versus temperature plot
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Failure and yield strain versus temperature plot
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Modulus versus temperature plot
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Amplitude, energy and time plot of acoustic emission data under tensile loading
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SEM micrograph of fractured surface under tensile loading at (a and e) room temperature, (b and f) 700°C, (c and g) 1000°C and (d and h) 1250°C showing matrix crack, fiber pull out, interfacial debonding and fiber fracture
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C-scan images of virgin and fractured specimens under tensile load at RT (23°C) and at 1380°C
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S-N diagram at room temperature
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Effect of temperature on S-N diagram
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Effect of frequency on S-N diagram at (a) room temperature and (b) 700°C
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Modulus degradation under fatigue loading
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Energy, amplitude and time plot of acoustic emission data under fatigue loading at room temperature and at 95 percent of σult
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Effect of temperature on modulus degradation under fatigue loading
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SEM micrograph of fractured surfaces under fatigue loading at room temperature (a and d), 700°C (b and e) and 1000°C (c and f), showing matrix crack, fiber pull out and fiber breakage
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Schematic of damage development under fatigue loading
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C-scan images of the fractured specimens subjected to fatigue loading at RT and 700°C
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Plots of constants P, Q, R, P1, Q1, and R1 as a function of temperature
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Plots of constants A and B as a function of temperature
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An edge-loaded tensile specimen
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Stress versus strain plot at room temperature (23°C), 700°C, 1000°C, and 1250°C

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