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首页> 外文期刊>Construction and Building Materials >A serial two-stage viscoelastic-viscoplastic constitutive model with thermodynamical consistency for characterizing time-dependent deformation behavior of asphalt concrete mixtures
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A serial two-stage viscoelastic-viscoplastic constitutive model with thermodynamical consistency for characterizing time-dependent deformation behavior of asphalt concrete mixtures

机译:具有热力学一致性的连续两阶段粘弹-粘塑性本构模型,用于表征沥青混凝土混合物随时间变化的变形行为

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摘要

A serial two-stage viscoelastic-viscoplastic constitutive model is developed using internal variables theory and orthogonality principle of thermodynamics for modeling time-dependent behavior of asphalt concrete mixtures. In one stage when the actual stress is lower than the yield stress, the constitutive model only exhibit viscoelastic component, while in another stage when the actual stress exceeds the yield stress, the constitutive model exhibit both viscoelastic and viscoplastic components. Model parameters of viscoelastic component are estimated using data obtained from dynamic modulus test, whereas model parameters of viscoplastic component are consecutively estimated from creep test, assuming a known viscoelastic component.
机译:利用内部变量理论和热力学正交性原理,建立了一个两阶段的粘弹性粘塑性本构模型,用于建模沥青混凝土混合物随时间变化的行为。在一个阶段,当实际应力低于屈服应力时,本构模型仅显示粘弹性成分,而在另一个阶段,当实际应力超过屈服应力时,本构模型同时显示粘弹性和粘塑性成分。使用动态模量试验获得的数据估算粘弹性组分的模型参数,而假设已知粘弹性组分,则通过蠕变试验连续估算粘塑性组分的模型参数。

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