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Oxidation Induced Stress-Rupture of Fiber Bundles FREE

[+] Author Affiliations
Edgar Lara-Curzio

Oak Ridge National Laboratory, Oak Ridge, TN

Paper No. 97-GT-332, pp. V004T13A014; 8 pages
doi:10.1115/97-GT-332
From:
  • ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award
  • Orlando, Florida, USA, June 2–5, 1997
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7871-2
  • Copyright © 1997 by ASME

abstract

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 © 1997 by ASME
Topics: Fibers , Stress , oxidation , Rupture
This article is only available in the PDF format.

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