Abstract
The fatigue life response of AS-4/PEEK laminate composites was studied at different stress amplitudes. The experimental tests was done on the laminates to acquire data for evaluation of the analytical model. The data were estimated and analyzed by median rank order-static cumulative-distribution and Weibull distribution function. The S-N curves at different survival probabilities were presented by the Weibull distribution function. Residual strength degradation model was used to predict the fatigue life of the composite material.