Affiliation:
1. Dept. of Mechanical and Aerospace Engineering State University of New York at Buffalo Buffalo, NY 14260
Abstract
Fatigue behavior of glass fiber reinforced epoxy composite materials has been studied analytically. A new concept called "fatigue modulus," which is defined as a slope of applied stress and resultant strain at a specific cycle is introduced. Fatigue modulus degradation is studied using an assumption that the fatigue modulus degrada tion rate follows a power function of fatigue cycle. Theoretical equation for predicting fatigue life is formulated using the fatigue modulus and its degradation rate. This rela tion is simplified by strain failure criterion for the practical application. It is proved that the final formula predicts the fatigue life of a glass fiber epoxy composite material better than S-N curve or Basquin's relation. An attempt is made to find the relation ship between fatigue modulus and elastic modulus by the geometric relation from stress-strain curve under the cyclic loading.
Subject
Materials Chemistry,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites
Reference32 articles.
1. Real-Time Characterization of Damage Growth in Graphite/Epoxy Laminates
2. Tanimoto, T. and Amijima, S. "Fatigue Properties of Laminated Glass Fiber Composite Materials," 29th Annual RP/CI Conference , SPI (1974).
3. Proof Testing of Composite Materials
4. Fatigue Behavior of Composite Laminate
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