An integrated methodology for fatigue life prediction of carbon fiber-reinforced polymer matrix composites under constant and variable R-ratio loadings

13th International Conference on Textile Composites

Kawai, M.^1

Department of Engineering Mechanics and Energy, University of Tsukuba, Tsukuba

305-8573, Japan^1

关键词: Carbon fiber composite;    Carbon fiber reinforced composite;    Carbon fiber reinforced polymer;    Critical stress ratio;    Effect of temperature;    Fatigue life prediction;    Integrated methodology;    Transient changes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/406/1/012001/pdf
DOI  :  10.1088/1757-899X/406/1/012001

来源: IOP

【 摘 要 】

The progress in the anisomorphic constant fatigue life (CFL) diagram approach for efficiently identifying the fatigue of carbon fiber-reinforced composites under constant waveform loading over the whole range of mean stress is reviewed. The asset of this approach is the concept of critical stress ratio. The anisomorphic formulation of CFL diagram is flexible enough not only to increase the number of segments to accommodate the transient change in sensitivity to mean stress, but also to take a generalized form that considers the effect of temperature as well as the effect of variability in fatigue life. The anisomorphic approach is shown to succeed in describing the asymmetric and nonlinear CFL diagrams for carbon fiber composites of different kinds. It is suggested that the classic procedure for prediction of spectrum loading fatigue life of composites using the Miner rule with the rain flow cycle counting method is powered by integrating with the anisomorphic CFL diagram approach.