A Statistical Model for Predicting Fatigue Life of Graphite/Epoxy Laminates

by J. N. Yang, George Washington Univ, United States,
S. H. Yang, George Washington Univ, United States,
D. L. Jones, George Washington Univ, United States,



Document Type: Proceeding Paper

Part of: Probabilistic Methods in Civil Engineering

Abstract:

A failure stiffness criterion and a residual stiffness degradation model are proposed from which the statistical distribution of the fatigue life of composite laminates is derived. Experiments have been performed on graphite/epoxy [90,+45,-45,0]s laminates to verify the analytical model. It is demonstrated that the correlation between the experimental results and the theoretical predictions for the fatigue life distribution is quite reasonable.

Subject Headings: Laminated materials | Fatigue life | Stiffening | Statistics | Minerals | Synthetic materials | Mathematical models

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