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Fundamentals of constitutive equations for geomaterials

机译:岩土本构方程的基本原理

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Constitutive equations for geomaterials constitute a very intricate field. In the first part of this chapter, a synthetic view of constitutive formalism is presented. An intrinsic classification of all existing constitutive relation is deduced. Then examples of incrementally non-linear relations are given and some applications follow. A numerical study of the so-called "yield surfaces" is presented, and is followed by a discussion on the validity of the principle of superposition for incremental loading. Finally the question of the existence of a flow rule is discussed for both axisymmetric and 3D conditions. In agreement with discrete element computations, it is shown that a flow rule can exist in 2D and not in 3D.
机译:岩土材料的本构方程构成了一个非常复杂的领域。在本章的第一部分中,提出了构成形式主义的综合观点。推导所有现有本构关系的内在分类。然后给出了增量非线性关系的示例,并给出了一些应用。提出了对所谓的“屈服面”的数值研究,然后讨论了增量载荷叠加原理的有效性。最后,针对轴对称和3D条件讨论了流动规则存在的问题。与离散元素计算一致,表明流规则可以存在于2D中而不存在于3D中。

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