Abstract
The fractal dimension(m)is determined by the AE amplitude distribution during the tensile test of fatigued FRPA. The fractal dimension decreases with an increase in the number or cycles at constant stress amplitude. The degradation of resin in microfractgraphs of fatigued FRPA can be quantitatively explained by the fractal dimension. It is found that the normalized fractal dimension correlates not only to the normalized strain energy but also to the normaliged maximum load at the tensile test after fatigue, and that the correlation between the normalized fractal dimension and the normalized strain energy is a little stronger than the one between the normalized fractal dimension and the normalized maximum load.
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