Abstract
Fatigue life scattering of glass fibre-reinforced epoxy composites has been studied at 300 K and 77 K. The static strength and the fatigue life distributions were studied using normal, log-normal and two-parameter Weibull distribution functions; the value of mean fatigue life was analysed using mean fatigue life, mean log fatigue life and expected value of the Weibull distribution function. The effect on fatigue life of two stress levels (low-high and high-low) was investigated using the distribution functions; a modification of Miner's rule is made to predict the resulting scattering.
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