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Thermodynamic theory of the viscoelasticity and yield of glassy polymers: Internal time theory

机译:玻璃态聚合物粘弹性和屈服的热力学理论:内部时间理论

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A nonlinear viscoelastic constitutive equation of glassy polymers has been developed on the basis of the internal time and irreversible thermodynamics of internal variables. The constitutive equation is a generalization of spring-dashpot models and describes the yield behavior of glassy polymers. With this constitutive equation, the rate of entropy production has been determined to show a peak near the yield. We propose a new yield criterion, that yield occurs at the maximum rate of entropy production. The yield criterion is almost equivalent to that of peak stress and a thermodynamic interpretation of yield. (C) 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 2400-2411, 2003. [References: 23]
机译:基于内部时间和内部变量的不可逆热力学,建立了玻璃态聚合物的非线性粘弹性本构方程。本构方程是弹簧缓冲器模型的概括,描述了玻璃状聚合物的屈服行为。利用该本构方程,已经确定了熵产生的速率以在产率附近显示一个峰值。我们提出了一个新的产量准则,即产量以熵产生的最大速率发生。屈服准则几乎等于峰值应力和屈服的热力学解释。 (C)2003 Wiley Periodicals,Inc. J Appl Polym Sci 89:2400-2411,2003。[参考:23]

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