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首页> 外文期刊>The international journal of pavement engineering >Numerical Implementation And Validation Of A Nonlinear Viscoelastic And Viscoplastic Model For Asphalt Mixes
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Numerical Implementation And Validation Of A Nonlinear Viscoelastic And Viscoplastic Model For Asphalt Mixes

机译:沥青混合料非线性粘弹粘塑性模型的数值实现与验证

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This study presents the numerical implementation and validation of a constitutive model for describing the nonlinear behaviour of asphalt mixes. This model incorporates nonlinear viscoelasticity and viscoplasticity to predict the recoverable and irrecoverable responses, respectively. The model is represented in a numerical formulation and implemented in a finite element code using a recursive-iterative algorithm for nonlinear viscoelasticity and the radial return algorithm for viscoplasticity. Then the model is used to analyse the behaviour of asphalt mixtures subjected to single creep-recovery tests at different stress levels and temperatures. This experimental analysis includes the separation of the viscoelastic and viscoplastic strain components and identification of the material parameters associated with these components. Finally, the model is applied and verified against a set of creep-recovery tests at different stress levels and temperatures.
机译:这项研究提出了描述沥青混合料非线性行为的本构模型的数值实现和验证。该模型结合了非线性粘弹性和粘塑性以分别预测可恢复和不可恢复的响应。该模型以数值公式表示,并使用有限元代码(使用用于非线性粘弹性的递归迭代算法和用于粘塑性的径向返回算法)实施。然后,该模型用于分析在不同应力水平和温度下进行单一蠕变恢复测试的沥青混合料的性能。该实验分析包括粘弹性和粘塑性应变分量的分离以及与这些分量相关的材料参数的识别。最后,应用该模型并针对在不同应力水平和温度下的一组蠕变恢复测试进行验证。

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