|Table of Contents|

[1] Cai Xing, Yang Jun,. A fatigue damage model for asphalt mixturesunder controlled-stress and controlled-strain modes [J]. Journal of Southeast University (English Edition), 2019, 35 (1): 89-96. [doi:10.3969/j.issn.1003-7985.2019.01.013]

A fatigue damage model for asphalt mixturesunder controlled-stress and controlled-strain modes()

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

2019 1
Research Field:
Traffic and Transportation Engineering
Publishing date:


A fatigue damage model for asphalt mixturesunder controlled-stress and controlled-strain modes
Cai Xing Yang Jun
School of Transportation, Southeast University, Nanjing 210096, China
asphalt mixtures fatigue model control mode continuum damage mechanics dynamic modulus
A fatigue damage model based on thermodynamics was deduced for asphalt mixtures under controlled-stress and controlled-strain modes. By employing modulus of resilience as the damage hardening variable, a damage variable related with dynamic modulus was extracted as the evaluation index. Then, the damage evolution law under two control modes was proposed, and it has a similar form to the Chaboche fatigue model with a nonnegative material parameter m related to its loading level. Experimental data of four loading levels were employed to calibrate the model and identify the parameter in both control modes. It is found that the parameter m shows an exponential relationship with its loading level. Besides, the difference of damage evolution under two control modes was explained by the law. The damage evolves from fast to slow under a controlled-strain mode. However, under a controlled-stress mode, the evolution rate is just the opposite. By using the damage equivalence principle to calculate the equivalent cycle numbers, the deduced model also interprets the difference of damage evolution under two control modes on the condition of multilevel loading. Under a controlled-strain mode, a loading sequence from a low level to a high level accelerates damage evolution. An inverse order under the controlled-stress mode can prolong fatigue life.


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Biographies: Cai Xing(1993—), female, Ph.D. candidate;Yang Jun(corresponding author), female, doctor, professor, yangjun@seu.edu.cn.
Foundation item: The Open Fund Project of National Key Laboratory of High Performance Civil Engineering Materials(No.2016CEM001).
Citation: Cai Xing, Yang Jun. A fatigue damage model for asphalt mixtures under controlled-stress and controlled-strain modes[J].Journal of Southeast University(English Edition), 2019, 35(1):89-96.DOI:10.3969/j.issn.1003-7985.2019.01.013.
Last Update: 2019-03-20