| Autor: |
Xiao, Minmin, Guo, Xu, Li, Chunyan, Ren, Jianguo, Dong, Jingyong, Zhuang, Yuhua, Li, Zhenyu |
| Zdroj: |
Materials & Structures; May2024, Vol. 57 Issue 4, p1-14, 14p |
| Abstrakt: |
To propose a constitutive model that can accurately characterize the three stages of asphalt mixture creep, the fractional Burgers damage creep model is constructed based on the Burgers model by combining the fractional calculus theory and damage mechanics theory. The effect of stress on the viscoelasticity of the asphalt mixture is analyzed by the uniaxial compression creep test. Through the sensitivity analysis of the model parameters, the regulatory role and physical significance of each parameter are clarified. Based on the fractional Burgers damage creep model, a method is proposed to predict the creep considering time-varying stress. The results show that the fractional Burgers damage creep model can accurately fit the creep curve of the whole process. The fractional Kelvin element of damage is closely related to the rheological time of the model. The larger the value of α, the stronger the viscous flow ability of the model, which is consistent with the results of the parametric analysis considering stress. The prediction method considering time-varying stresses has some rationality and correctness. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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