This paper addresses the derivation of creep models using the framework of hyper-viscoplasticity. It demonstrates that the formulations widely used already can easily be obtained using the hyper-viscoplastic formalism. This means that existing formulations (i.e. of the flow potential) are thermodynamically sound. The key assumptions are that the free energy is only a function of elastic strains and that there is no dissipation under pure volumetric swelling (tension). The presented derivations, using the framework of hyper-viscoplasticity, allows for further model development along the same lines, as presented here, with only minor modifications.

中文翻译：

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使用超粘塑性框架对粘土中的蠕变进行建模

本文介绍了使用超粘塑性框架进行蠕变模型的推导。它表明使用高粘塑性形式主义可以容易地获得已经广泛使用的制剂。这意味着现有配方（即流动势的配方）在热力学上是合理的。关键的假设是，自由能仅是弹性应变的函数，并且在纯体积膨胀（张力）下没有损耗。使用超粘塑性框架提出的派生方法，可以沿本文所述的相同路线进行进一步的模型开发，仅需少量修改。