Oxidation Induced Stress-Rupture of Fiber Bundles

[+] Author and Article Information
Edgar Lara-Curzio

High Temperature Materials Laboratory, Oak Ridge National Laboratory, Oak Ridge, TN 37831

J. Eng. Mater. Technol 120(2), 105-109 (Apr 01, 1998) (5 pages) doi:10.1115/1.2806996 History: Received May 26, 1997; Revised September 10, 1997; Online November 27, 2007


The effect of oxidation on the stress-rupture behavior of fiber bundles was modeled. It is shown that oxidation-induced fiber strength degradation results in the delayed failure of the associated fiber bundle and that the fiber bundle strength decreases with time as t-1/4 . It is also shown that the temperature dependence of the bundle loss of strength reflects the thermal dependence of the mechanism controlling the oxidation of the fibers. The effect of gauge length on the fiber bundle strength was also analyzed. Numerical examples are presented for the special case of Nicalon™ fibers.

Copyright © 1998 by The American Society of Mechanical Engineers
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