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Proceedings Paper

Effect of matrix toughness on fatigue life of plain woven carbon fabric composites
Author(s): Yasuhiro Nishikawa; Kazuya Okubo; Toru Fujii; Toshiyuki Uenoya
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Paper Abstract

The effect of matrix toughness on the fatigue life of polymer matrix composites using plain woven carbon fabrics (pw-CFC) was studied. In order to vary the matrix toughness without changing the inherent cohesion properties such as adhesive strength between matrix and fibers, two different curing agents (acid anhydride and amine types) were used. Static tensile and tension/tension fatigue cyclic loads were applied to pw-CFC specimens. It was observed that the fatigue life was significantly affected by matrix toughness. During the fatigue tests, damage progression was observed intermittently by using a thermo-elastic stress analyzer (TSA). The stress re-distribution occurs due to fatigue damage progression. TSA can identify such stress re- distribution by means of detecting surface temperature amplitude. Highly fatigue-damaged area of pw-CFC was localized if the matrix toughness was high, although moderately damaged area grew all over the specimen. The experimental results indicate that the fatigue life and damage of pw-CFC are strongly governed by matrix toughness.

Paper Details

Date Published: 3 August 2001
PDF: 10 pages
Proc. SPIE 4336, Nondestructive Evaluation of Materials and Composites V, (3 August 2001); doi: 10.1117/12.435575
Show Author Affiliations
Yasuhiro Nishikawa, Doshisha Univ. (Japan)
Kazuya Okubo, Doshisha Univ. (Japan)
Toru Fujii, Doshisha Univ. (Japan)
Toshiyuki Uenoya, Technology Research Institute of Osaka Prefecture (Japan)

Published in SPIE Proceedings Vol. 4336:
Nondestructive Evaluation of Materials and Composites V
George Y. Baaklini; Eric S. Boltz; Steven M. Shepard; Peter J. Shull, Editor(s)

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