A thermo-viscoplastic constitutive model for clays

被引：0
|
作者：
Modaressi, H [1 ]
Laloui, L [1 ]
机构：
[1] BUR RECH GEOL & MINIERES,DIRECT RECH,F-45060 ORLEANS 02,FRANCE
来源：
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS | 1997年 / 21卷 / 05期
关键词：
thermo-mechanical behaviour; thermoviscoplasticity; environmental loading; thermal hardening; constitutive model for clays; coupling in porous media;
D O I：
10.1002/(SICI)1096-9853(199705)21:5<313::AID-NAG872>3.0.CO;2-5
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
The effect of heat on clay behaviour is characterized by non-linearity and irreversibility. Due to the complex influence of temperature, thermomechanical factors have to be taken into account for the numerical simulation of the behaviour of such materials. A cyclic thermo-viscoplastic model is developed for this purpose, It includes thermal hardening and the evolution of yield surfaces with temperature. From the physical point of view, it is built on the basis of available experimental results for a temperature range in which no phase change occurs. Conceptually, it is the generalization of an isothermal multimechanism cyclic model. A thermoplastic formulation of the model is also derived. The results obtained from numerical simulations compare well with experiments. (C) 1997 by John Wiley & Sons, Ltd.
引用
收藏
页码：313 / 335
页数：23
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