The concept of stored plastic work or frozen elastic energy in soil mechanics
The concept of stored plastic work or frozen elastic energy in soil mechanics
复制标题
DOI：
10.1680/geot.2005.55.5.373
复制
发表时间：
2005-06
期刊：
影响因子：
5.8
通讯作者：
I. Collins
中科院分区：
文献类型：
--
作者：
I. Collins
本文是一系列的一部分，旨在系统地探讨现代热力学理论的应用，土壤和其他岩土材料的本构建模。虽然在单个晶粒的水平上，将所施加的功分为可恢复的弹性能和不可恢复的塑性能是直接的，但在连续体的水平上，这是不正确的。由于微观层面的应力场和变形场的高度不均匀性，一些微观层面的弹性能被“冻结”，因此一些施加的塑性功被存储并可恢复。这个概念是解释在微观层面上，在中观层面上的力链，并在连续的水平。它也解释了一个示意性的弹簧滑块模型。这些想法有非常重要的影响，本构模型在连续水平。特别是它表明，有两个原因在土壤中的膨胀，一个是由于雷诺的粘性，另一个是由于…
This paper is part of a series that aims to explore systematically the applications of the modern theory of thermomechanics to the constitutive modelling of soils and other geomaterials. Although the division of the applied work into recoverable elastic energy and irrecoverable plastic energy is straightforward at the level of single grains, this is not true at the continuum level. Because of the highly heterogeneous nature of the stress and deformation fields at the micro level, some of the micro-level elastic energy is ‘frozen’, and consequently some of the applied plastic work is stored and is recoverable. The concept is explained at the micro level, at the meso level of the force chains, and at the continuum level. It is also explained in terms of a schematic spring–slider model. These ideas have very important ramifications for constitutive modelling at the continuum level. In particular it is shown that there are two causes for dilation in a soil, one due to Reynolds’ dilatancy, the other due to the...