ISA model: A constitutive model for soils with yield surface in the intergranular strain space
ISA model: A constitutive model for soils with yield surface in the intergranular strain space
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DOI：
10.1002/nag.2370
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发表时间：
2015-08-10
影响因子：
4
通讯作者：
Triantafyllidis, Th.
中科院分区：
文献类型：
--
作者：
Fuentes, W.;Triantafyllidis, Th.
本文提出了一种新的土的本构模型。它是用塑性的方法来表述的，但与以往的工作相反，它提出了一个描述晶间应变空间内表面的屈服函数。后者是提供最近应变历史信息的状态变量。为了保证应力速率的连续性，提出了塑性应变速率的表达式。在中、大应变幅值的作用下，本构方程不再受晶间应变的影响，其数学结构类似于某些卡尔斯鲁厄发育不良模型。为评价和分析模型的性能，进行了单调和循环三轴试验。版权所有：john Wiley & Sons， Ltd
In this article, a new constitutive model for soils is proposed. It is formulated by means of plasticity, but in contrast to the precedent works, it presents a yield function describing a surface within the intergranular strain space. This latter is a state variable providing information of the recent strain history. An expression for the plastic strain rate has been proposed to guarantee the stress rate continuity. Under the application of medium or large strain amplitudes, the constitutive equation becomes independent of the intergranular strain and delivers a mathematical structure similar to some Karlsruhe hypoplastic models. Some simulations of monotonic and cyclic triaxial test are provided to evaluate and analyze the model performance. Copyright (c) 2015John Wiley & Sons, Ltd.