ISSN: 0884-6804
CODEN: JCTRER
Page Count: 8

Strain-Controlled Flexural Fatigue of Unidirectional Composites
Agarwal, BD
University of Utah, UT

Joneja, SK
advance engineer, Owens Corning Fiberglas Corp., OH

Abstract

Strain-controlled flexural fatigue of a unidirectionally reinforced glass fiber epoxy composite has been studied for four fiber orientations: 0, 10, 45, and 90°. Progressive damage has been investigated through measurements during fatigue tests and through static tests on precycled specimens. Variations in residual stiffness and strength have been explained through observed damage mechanisms at different fiber orientations. Two empirical relations have been evolved to predict fatigue strength of fibrous composites from their static properties alone. These predictions are in good agreement with the present experimental results as well as with the limited results available in the literature.

Keywords:
composite materials, fatigue (materials), unidirectional composites, strains, glass fibers, epoxy resin, flexural fatigue, fatigue damage, off-axis fatigue, strain-controlled fatigue, prediction of fatigue life

Paper ID: CTR10754J
DOI: 10.1520/CTR10754J
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