EFFECTS OF VISCOUS PROPERTY AND WETTING ON 1-D COMPRESSION OF CLAY AND MODEL SIMULATION
EFFECTS OF VISCOUS PROPERTY AND WETTING ON 1-D COMPRESSION OF CLAY AND MODEL SIMULATION
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DOI：
10.3208/sandf.51.897
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发表时间：
2011-10
影响因子：
3.7
通讯作者：
Jian-liang Deng;H. Nawir;F. Tatsuoka
中科院分区：
文献类型：
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作者：
Jian-liang Deng;H. Nawir;F. Tatsuoka
摘要通过对压实高岭土粉土的一维压缩试验，研究了粘性和润湿性对土的弹粘塑性变形的综合影响。在测试中，在固定应变率下的单调加载期间，允许在各种固定应力状态下发生蠕变变形和由于湿润而产生的塌陷变形。通过将润湿效应纳入非线性三组分弹粘塑性模型（3C模型），描述了1-D压缩过程中观察到的粘性和润湿对应力-应变行为的综合影响。根据实验结果，润湿对3C模型的塑性分量的无粘应力和不可逆应变关系的影响和粘性分量的性质，具有Isotach性质，被配制为饱和度的函数。复杂的速率和时间依赖性的应力-应变行为在饱和过程中观察到在一个固定的应力状态和随后的单调加载在一个恒定的应变速率被成功地模拟。
ABSTRACT A series of one-dimensional (1D) compression tests on compacted kaolin powder were performed to evaluate the combined effects of the viscous property and wetting on the elasto-viscoplastic deformation of soil. In the tests, both creep deformation and collapse deformation due to wetting were allowed to take place at various fixed stress states during otherwise monotonic loading at a fixed strain rate. Combined effects of the viscous property and wetting on the stress-strain behaviour observed during 1-D compression were described by incorporating the wetting effects into a non-linear three-component elasto-viscoplastic model (a 3C model). Based on the experimental results, the effects of wetting on the inviscid stress and the irreversible strain relation of the plastic component of the 3C model and the property of the viscous component, having an Isotach property, are formulated as a function of the degree of saturation. Complicated rate- and time-dependent stress-strain behaviour observed during saturation at a fixed stress state and subsequent monotonic loading at a constant strain rate were successfully simulated.