Abstract
Viscoelastic continuum damage (VECD) is a powerful method to describe fatigue behavior of asphalt concrete mixtures by implementing the fundamental mechanistic principles. In this study, peak-to-peak values of stress and strain are used to simplify the calculation of damage parameters in VECD model using cyclic flexural fatigue test. Fatigue tests have been conducted over a range of strain and frequency levels. It was observed that excluding the samples with initial pseudostiffness (I) less than 0.74, other specimens’ characteristic curve overlaps on a unique curve for any set of loading. Also, the results showed that there is an inverse relationship between the material constant (α) and the slope of the central portion of the relaxation modulus curve obtained from a flexural dynamic test using 4-point bending beam apparatus.
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