Viscoelastic Damage Characteristics of Asphalt Mixtures Using Fractional Rheology.
Viscoelastic Damage Characteristics of Asphalt Mixtures Using Fractional Rheology.
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DOI：
10.3390/ma14195892
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发表时间：
2021-10-08
期刊：
影响因子：
--
通讯作者：
Dong Q
中科院分区：
文献类型：
--
作者：
Zhang Q;Gu X;Yu Z;Liang J;Dong Q
沥青混合料在高应力水平下的力学行为具有非线性粘弹性和损伤演化特征。本文采用分数阶流变理论对混合料的三阶段蠕变过程进行表征，建立了考虑蠕变硬化和蠕变损伤机制的非线性损伤本构模型。在不同温度、不同应力条件下进行了一系列单轴压缩蠕变试验，对模型进行了验证。结果表明，模型预测与蠕变试验结果吻合较好。建立了模型参数与外加应力之间的关系，得到了混合料只表现蠕变固结的应力范围。沥青混合料的破坏始于稳定阶段；然而，它是在第三阶段发展起来的。采用双参数威布尔分布函数描述了不同应力水平和温度下损伤值与损伤应变之间的演化关系。不同温度下的相关系数均大于0.99，表明可以建立统一的损伤演化模型。因此，统一模型的参数与材料特性和温度有关，而与施加在混合物上的应力水平无关。
The mechanical behavior of asphalt mixtures at high stress levels are characterized by non-linear viscoelasticity and damage evolution. A nonlinear damage constitutive model considering the existence of creep hardening and creep damage mechanisms in the entire creep process is proposed in this study by adopting the fractional rheology theory to characterize the three-stage creep process of mixtures. A series of uniaxial compressive creep tests under various stresses were conducted at different temperatures to verify the model. The results indicated that the model predictions were in good agreement with the creep tests. The relationship between the model parameters and applied stresses was established, and the stress range in which the mixture exhibited only creep consolidation was obtained. The damage to the asphalt mixture was initiated in the steady stage; however, it developed in the tertiary stage. A two-parameter Weibull distribution function was used to describe the evolution between the damage values and damage strains at different stress levels and temperatures. The correlation coefficients were greater than 0.99 at different temperatures, indicating that a unified damage evolution model could be established. Thus, the parameters of the unified model were related to material properties and temperature, independent of the stress levels applied to the mixtures.
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影响因子：
2.6
作者：
KOELLER, RC
通讯作者：
KOELLER, RC
DOI：
10.1007/s12572-011-0028-9
发表时间：
2011-12-01
影响因子：
0.9
作者：
Abu Al-Rub, Rashid K.;You, Taesun;Little, Dallas N.
通讯作者：
Little, Dallas N.
影响因子：
7.4
作者：
Ahmed, Imtiaz;Thom, Nick;Dawson, Andrew
通讯作者：
Dawson, Andrew
影响因子：
5.3
作者：
Xu, Xu-Bing;Cui, Zhen-Dong
通讯作者：
Cui, Zhen-Dong
沥青混合料两阶段粘弹粘塑性损伤本构模型
DOI：
10.1061/(asce)mt.1943-5533.0000646
发表时间：
2013-08-01
影响因子：
3.2
作者：
Sun, Lu;Zhu, Haoran;Zhu, Yaoting
通讯作者：
Zhu, Yaoting