METHOD TO IDENTIFY RHEOLOGICAL MODELS BY UNIFIED RHEOLOGICAL MODEL THEORY AND CASE STUDY
METHOD TO IDENTIFY RHEOLOGICAL MODELS BY UNIFIED RHEOLOGICAL MODEL THEORY AND CASE STUDY
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发表时间：
2008
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通讯作者：
Z. Chunsheng
中科院分区：
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作者：
Z. Chunsheng
岩石的弹性、塑性和粘性均采用M。分别带弹簧、滑块和阻尼器的制动器。三要素并行组合可构建七种不同的模型。在这7种模型中，有4种模型（包括阻尼器本身）是4种基本的流变模型，分别对应于与时间效应有关的4种基本力学行为。四种基本流变模型串联组合可形成十五种流变模型，包括四种基本流变模型和十一种复合流变模型。由所有四个基本流变模型串联而成的统一流变模型包括其余十四个流变模型，即十四个流变模型是统一流变模型的特例。根据不同应力水平下的加卸载蠕变试验曲线，可以区分出对应于15种基本力学行为的15种流变模型。十五种流变模型与十五种流变行为之间存在一一对应关系。有些文献中的流变模型与十五种流变模型在形式上略有不同，但根据转换原理，可以将它们转换为十五种流变模型之一。根据统一流变模型理论，提出了通过不同应力水平下加卸载蠕变试验结果来判别与流变行为相对应的流变模型的方法。给出了两个判别流变模型的实例，即采用两种岩石在不同应力水平下的加卸载蠕变试验数据，分别确定了适用于两种岩石的流变模型。
Elasticity,plasticity and viscosity of rocks are simulated by M. Reiner with spring,slider and dashpot respectively. Seven different models can be constructed by parallel combination of the three elements. Among these seven models,four models containing dashpot in parallel connection(including dashpot itself) are distinguished as four fundamental rheological models,which are corresponding to four kinds of fundamental mechanical behaviors related with time effects. Fifteen rheological models can be formed through series combination of the four fundamental rheological models,including four fundamental rheological models and eleven composite rheological models. The unified rheological model,formed by all four fundamental rheological models in a series, includes the remaining fourteen rheological models,i.e. the fourteen rheological models are special cases of the unified rheological model. The total fifteen rheological models corresponding to fifteen kinds of fundamental mechanical behaviors can be distinguished by load-unload creep test curves under different stress levels. There are one-to-one correspondence between the fifteen rheological models and the fifteen kinds of rheological behaviors. The rheological models in some literatures are of slightly different in form from the fifteen models,but they can be converted to one of the fifteen models by the principle of conversion. Procedures are presented to distinguish the rheological models corresponding to rheological behaviors through the load-unload creep test results under different stress levels by the unified rheological model theory. Two examples for distinguishing rheological models are given;in another word,the load-unload creep test data of two kinds of rocks under different stress levels are adopted in determining the rheological models suitable for the two kinds of rocks respectively.