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Strength of Materials

, Volume 50, Issue 5, pp 764–771 | Cite as

Fatigue Damage Analysis of an Asphalt Mixture Based on Pseudostiffness

  • X. R. Wang
  • B. Y. Yin
  • W. B. Luo
Article
  • 9 Downloads

The fatigue damage characteristics of an asphalt mixture were analyzed, a new fatigue damage model was constructed based on the Schapery pseudovariable theory and continuum damage mechanics. According to the Schapery theory and the generalized elastic-viscoelastic correspondence principle, the experimental stress–strain curves of the asphalt mixture are transformed into the stress vs. pseudostrain curves. The relation between stress and pseudostrain is shown to be linear, which eliminates the viscoelastic hysteresis effect of the asphalt mixture and its time dependence. Pseudostiffness decreases gradually with the number of fatigue cycles. The damage variable is defined by the change in pseudostiffness. The parameters of the fatigue damage model are verified by fatigue tests up to 1000 cycles, and the fatigue damage for 2000 cycles is predicted and compared with the test results, which are in good agreement between themselves.

Keywords

fatigue damage pseudostrain fatigue lifetime viscoelasticity pseudostiffness 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (11572275), the Key Laboratory of Road Structure and Material of Ministry of Transportation (Beijing) and the Hunan Provincial Innovation Foundation for Postgraduate, China (CX2018B074).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.College of Civil Engineering and MechanicsXiangtan UniversityXiangtanChina
  2. 2.Hunan Key Laboratory of Geomechanics and Engineering SafetyXiangtan UniversityXiangtanChina

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