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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

Figures

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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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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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