Incrementalization of a single hardening constitutive model for frictional materials

被引:19
作者
Lade, PV
Jakobsen, KP
机构
[1] Univ Aalborg, Dept Civil Engn, DK-9000 Aalborg, Denmark
[2] Danish Hydraul Inst, DK-2970 Horsholm, Denmark
关键词
incrementalization procedure; elasto-plastic constitutive model; frictional materials; yield surface; non-associated flow;
D O I
10.1002/nag.216
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The governing equations for an elasto-plastic constitutive model for frictional materials such as soil, rock, and concrete are presented, and the incremental form is indicated in preparation for implementation of the model in a user-defined module for finite element calculations. This isotropic, work-hardening and-softening model employs a single yield surface, it incorporates non-associated plastic flow, and its capability of capturing the behaviour of different types of frictional materials under various three-dimensional conditions has been demonstrated by comparison with measured behaviour, as presented in the literature. The incrementalization procedure is indicated and the resulting equations for the single hardening model are presented together with parameters for a dense sand. Following the implementation of the model, these parameters are used for evaluation of different integration schemes as presented in a companion paper by Jakobsen and Lade (lnt. J. Numer. Anal. Meth. Geomech. 2002;26:661). Copyright (C). 2002 John Wiley Sons, Ltd.
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页码:647 / 659
页数:13
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