Paper Title:
Stress-Strain Response in SiC/SiC Composites under Cyclic Loading
  Abstract

The tension-tension fatigue tests for SiC/SiC composites were performed under the conditions that the maximum load Pmax was 80-90% to the fracture load of the tensile tests and the stress ratio was Rσ = 0.5. The composites exhibited a width in stress-strain hysteresis loop under one load cycling. In some cases the mean strain εmean gradually increase with increasing in number of cycles. These variations would reflect the developments of the fatigue damage at the fiber/matrix interface during the cyclic loading process. The pull-out lengths of the fibers for the fatigued- and not fatigued-specimens were measured through the SEM observations after the tensile test. In all materials, the average pull-out length of fibers in fatigued material was larger than in not fatigued material because the cyclic loading affected on the fiber/matrix interfacial strength.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
1406-1409
DOI
10.4028/www.scientific.net/KEM.353-358.1406
Citation
J. J. Ohgi, S. Tanaka, T. Kuramoto, M. Suzuki, K. Goda, "Stress-Strain Response in SiC/SiC Composites under Cyclic Loading", Key Engineering Materials, Vols. 353-358, pp. 1406-1409, 2007
Online since
September 2007
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$32.00
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