ISSN: 0884-6804
Page Count: 6

A Stiffness-Based Statistical Model for Predicting the Fatigue Life of Graphite/Epoxy Laminates
Jones, DL
Research scientist and professor, School of Engineering and Applied Science, The George Washington University, D.C.

Yang, JN
Professor, School of Engineering and Applied Science, The George Washington University,

Yang, SH
Research scientist and professor, School of Engineering and Applied Science, The George Washington University, D.C.

Abstract

A stiffness-based statistical model is proposed for predicting the fatigue life of composite laminates under constant-amplitude tensile cyclic loadings. The model parameters are determined using measured stiffness degradation data. 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 very reasonable.

Keywords:
statistical model, stiffness, fatigue life, graphite/epoxy laminates, life predictions, experimental verification

Paper ID: CTR10165J
DOI: 10.1520/CTR10165J
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