Randomized trial examines fatigue behaviors in hybrid composites, suggesting a new predictive model for fatigue life.
Key Points
This research aims to develop a model for predicting the fatigue properties of hybrid composites based on the residual strength concept, accounting for stress ratio and loading sequences.
Conducted fatigue tests on hybrid carbon/glass fiber composites under various stress ratios and loading sequences.
Analyzed fatigue lives using different block spectrum loadings and assessed damage mechanisms experimentally.
Developed a new modeling algorithm that integrates fatigue properties with a residual strength failure criterion.
Predicted fatigue lives under various loading sequences deviated from experimental means by 7.9%, 11.6%, and 20.5%.
The new model offers superior prediction accuracy compared to the traditional Miner rule.