Creep failure of geomaterials and its numerical simulation
Creep failure of geomaterials and its numerical simulation
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DOI：
10.1680/geolett.11.00009
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发表时间：
2011-09
影响因子：
2.1
通讯作者：
A. Ezaoui;F. Tatsuoka;A. Duttine;H. Benedetto
中科院分区：
文献类型：
--
作者：
A. Ezaoui;F. Tatsuoka;A. Duttine;H. Benedetto
结果表明，岩土材料的蠕变破坏可以用非线性三分量弹粘塑性模型来模拟。该模型是在单一应力变量和等参粘性类型的情况下描述的，尽管该模型可以应用于除等参变量以外的更一般的三维应力条件和粘性类型。对蠕变破坏前后的应力松弛和蠕变变形等粘性行为的各种趋势进行了模拟，表明蠕变破坏是整个粘性行为的一个特殊方面，可以用单一的模型来模拟。模拟了压实湿水泥混合碎石土和饱和软粘土排水三轴压缩试验中观察到的蠕变破坏。
It is shown that creep failure of geomaterials can be simulated by a non-linear three-component elasto-viscoplastic model. The model is described in the case of a single stress variable and the isotach viscous property type, although the model can be applied to more general three-dimensional stress conditions and viscous property types other than isotach. Various trends of viscous behaviour, including stress relaxation and creep deformation with and without creep failure, are illustratively simulated to show that creep failure is one specific aspect of the whole viscous behaviour that can be simulated by a single model. Creep failures observed in drained triaxial compression tests on compacted moist cement-mixed gravelly soil and saturated soft clay are simulated.