反耗散概念及单轴蠕变本构方程

讨论了反耗散概念，认为在不可逆系统中既存在着耗散机制也存在着反耗散机制，反耗散机制是阻止耗散出现的一种机制．以此为基础得到了耗散条件，进而发现了有耦合关系的内变量之间存在着相互启动和相互遏制的行为，从而成功地解释了蠕变加速阶段产生的原因．文中推导了单轴蠕变的一般模型和实用的三内变量模型，并对后者给出了算例，结果表明模型可很好地描述蠕变的初始、稳定和加速阶段．

Anti-Dissipation and Uniaxial Creep Constitutive Equations

This paper makes a further investigation on the concept of anti dissipation, from which and Clausius Duhem inequality, a yield criterion of dissipation is obtained. By discussing the developing equations of internal variables with the yield criterion, it is discovered that the coupled internal variables have the behaviour that they may cause each other from static state into dissipative state or from the dissipative state into the static state, which may give a good explanation of the emerging of creep in accelerating period. In addition, the paper gives a uniaxial creep constitutive model and its special form, a three internal variables and gives a namerical example for the model with three internal variables. The numerical resoult shows that the model may discribe the properties of creep in the initial, steady and accelerating periods.