Development of a Failure Criterion for Asphalt Mixtures under Different Modes of Fatigue Loading

Abstract

In the study reported in this paper, the previously developed failure criterion for the viscoelastic continuum damage (VECD) model (referred to here as GOR, where O indicates old and GR is the rate of release of the pseudostrain energy) was applied to different modes of fatigue loading. The research team found that this criterion was mode-of-loading dependent and therefore considered insufficient. To mitigate this limitation, the GOR criterion was refined to become a new failure criterion, the GR method, which resolved the mode-of-load dependency issue. A characteristic relationship, which was found to exist in recycled asphalt pavement (RAP) and non-RAP mixtures between the rate of change of the averaged released pseudostrain energy during fatigue testing and the final fatigue life was derived in this study. This relationship is independent of mode of loading, strain amplitude, and temperature. The proposed failure criterion combines the advantages of the VECD model and this characteristic relationship, which originate from fundamental mixture properties. This proposed method can predict the fatigue life of asphalt concrete mixtures across different modes of loading, temperatures, and strain amplitudes within typical sample-to-sample variability that is observed in fatigue testing.

Fatigue Evaluation of Recycled Asphalt Mixture Based on Energy-Controlled Mode

“…Thus, it can be seen that the control mode plays a critical role in the evaluation of asphalt mixture fatigue properties. In view of this, many researchers only 2 Advances in Materials Science and Engineering use one control mode to evaluate asphalt mixture properties and construct fatigue damage models considering modulus, dissipated energy, and accumulative energy [13][14][15][16]. Some studies concentrated on the differences and relations between the two control modes, trying to unify the evaluation indexes [17][18][19][20] or to convert one to another [21].…”

Effect of Rejuvenator on Performance Properties of WMA Mixtures with High RAP Content

“…The S-VECD model is a continuum damage mechanics-based model. This model, coupled with its fatigue failure criterion, the G R method, has been applied effectively to predict the performance of asphalt concrete mixtures under different loading conditions (Hou et al 2010;Underwood et al 2012;Sabouri and Kim 2014;.…”

Performance properties of rubberized stone matrix asphalt mixtures produced through different processes

“…The S-VECD model is based on the elastic-viscoelastic correspondence principle, the work potential theory, and the temperature-time superposition principle. The S-VECD direct tension fatigue tests were performed to characterize fatigue performance of SMA mixtures at 17°C and a frequency of 10 Hz using an AMPT [12]. Three to four replicate specimens at a target air void were measured at three to four different strain amplitudes (high, medium and low) to produce a wide range of N f (from 1000 to 100,000) [13].…”

“…Prior to the direct tension fatigue test, the samples were glued to two end platens using a steel epoxy and a special gluing jig was used to eliminate eccentricity, and then the specimens were conditioned in an environmental chamber for 3 h to reach the test temperature. The data from the direct tension fatigue test were analyzed by the simplified viscoelastic continuum damage (S-VECD) theory using the fatigue analysis software developed by Underwood and Kim and G R (the rate of change of the averaged released pseudo strain energy values) failure criterion was used in the fatigue life prediction of SMA mixtures [12].…”