An elastoviscoplastic constitutive model for geomaterials: Application to hydromechanical modelling of claystone response to drift excavation

被引：19

作者：

Cuvilliez, Sam ^{[1
]}

Djouadi, Ines ^{[2
,3
]}

Raude, Simon ^{[2
]}

Fernandes, Romeo ^{[2
]}

机构：

[1] EDF Lab Paris Saclay, EDF R&D, 7 Blvd Gaspard Monge, F-91120 Palaiseau, France

[2] Univ Paris Saclay, IMSIA UMR EDF CNRS CEA ENSTA 9219, 828 Blvd Marechaux, F-91762 Palaiseau, France

[3] Fac Sci & Technol, GeoRessources UMR CNRS UL CREGU 7359, Rue Jacques Callot,BP 70239, F-54506 Vandoeuvre Les Nancy, France

来源：

COMPUTERS AND GEOTECHNICS | 2017年 / 85卷

关键词：

Claystone excavations; Nuclear waste disposal; Constitutive model; Viscoplasticity; Regularization technique; Code_Aster; 2ND GRADIENT; BEHAVIOR;

D O I：

10.1016/j.compgeo.2016.08.004

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

An isotropic elastoviscoplastic constitutive model based on a generalized Hoek-Brown criterion is proposed. The plastic mechanism is characterized by a positive and a negative hardening, and a specific non-associated flow rule allows to take into account the evolution of the dilatancy. Several hydromechanical finite element simulations corresponding to realistic configurations of drift excavations in the underground research laboratory of Bure are presented. Regularization techniques are required to avoid localization phenomena due to softening. A second gradient formulation has been used as it is well suited for dilatant materials such as claystone. Numerical results are discussed and compared with experimental measurements. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：321 / 340

页数：20

共 34 条

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