This study aims to propose a kinetics-based model of fatigue crack growth rate coupling with temperature, strain level and damage degree for bituminous materials. The fatigue crack length is calculated by an energy-based mechanistic (EBM) approach, and kinetic parameters characterizing the fatigue crack growth rate are determined based on an Arrhenius equation. Results show that the logarithm of the fatigue crack growth rate is linear to the inverse of absolute temperature, and cracking activation energy is independent of strain level and damage degree. Besides, the proposed kinetics-based model can predict fatigue crack growth rate at arbitrary temperature, strain level and damage degree of bituminous materials.

本研究旨在提出一种基于动力学的疲劳裂纹扩展速率与温度，应变水平和沥青材料损伤程度耦合的模型。疲劳裂纹长度是通过基于能量的机械（EBM）方法计算的，表征疲劳裂纹扩展速率的动力学参数是根据Arrhenius方程确定的。结果表明，疲劳裂纹扩展速率的对数与绝对温度的倒数成线性关系，裂纹激活能与应变水平和损伤程度无关。此外，所提出的基于动力学的模型可以预测在任意温度，应变水平和沥青材料的破坏程度下的疲劳裂纹扩展速率。