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首页> 外文期刊>Science in China. Series G, Physics, Mechanics & Astronomy >Research on nonlinear constitutive relationship of permanent deformation in asphalt pavements
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Research on nonlinear constitutive relationship of permanent deformation in asphalt pavements

机译：沥青路面永久变形的非线性本构关系研究

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摘要

To predict correctly the rut depths in asphalt pavements, a new nonlinear viscoelastic-elastoplastic constitutive model of permanent deformation in asphalt pavements is presented. The model combines a generalized Maxwell model with an elasto-plastic one. Then from the creep theory, the linear and nonlinear constitutive equations of the generalized Maxwell model are obtained. From the nonlinear finite element method for the rutting of the asphalt pavement, the rut depths of 4 asphalt-aggregate mixtures are obtained. And the results are compared with the ones from the finite element method by SHRP and the experiments by SWK/UN. The results in this paper are better than the ones by SHRP, and agree with the ones of the experiment by SWK/UN. This shows that the nonlinear viscoelastic-elastoplastic constitutive model, which is presented in this paper for the rutting of the asphalt pavement, is effective. The properties, such as nonlinear elasticity, plasticity, viscoelasticity and nonlinear viscoelasticity, which affect the rutting of an asphalt pavement, can be shown in the model. And the characteristics of the permanent deformation of the asphalt pavement can be presented entirely in the model.
机译：为了正确预测沥青路面的车辙深度，提出了一种沥青路面永久变形的非线性粘弹弹塑性本构模型。该模型将广义麦克斯韦模型与弹塑性模型结合在一起。然后根据蠕变理论，得到了广义麦克斯韦模型的线性和非线性本构方程。采用非线性有限元法对沥青路面进行车辙试验，得到了四种沥青-骨料混合物的车辙深度。并将结果与​​SHRP的有限元方法和SWK / UN的实验结果进行了比较。本文的结果优于SHRP的结果，与SWK / UN的实验结果一致。这表明本文提出的用于沥青路面车辙的非线性粘弹-弹塑性本构模型是有效的。可以在模型中显示诸如影响沥青路面车辙的非线性弹性，可塑性，粘弹性和非线性粘弹性等特性。模型中可以完全体现沥青路面永久变形的特征。

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