Finite element analysis of fluid influence on instabilities in two-phase Cam-clay plasticity model

  • Anna Stankiewicz Cracow University of Technology
  • Jerzy Pamin Cracow University of Technology

Abstract

The influence of fluid phase on soil instabilities is investigated using the modified Cam-clay model within a two-phase description. Spurious mesh dependence of finite element results is prevented by a gradient enhancement of the model. The results of numerical tests for one-phase and two-phase model are compared. The influence of permeability on the stabilizing role of the fluid phase is assessed.

Keywords

two-phase medium, finite element method, plasticity, Cam-clay model, gradient regularization, Localization,

References

[1] J.P. Bardet, A. Shiv. Plane-strain instability of saturated porous media. ASCE J. Eng. Mech., 121(6): 717- 724, 1995.
[2] A. Benallal, C. Comi. On numerical analyses in the presence of unstable saturated porous materials. Int. J. Numer. Meth. Engrg., 56(6): 883-910, 2003.
[3] R. Borja. Cam-Clay plasticity. Part V: A mathematical framework for three-phase deformation and strain localization analyses of partially saturated porous media. Comput. Methods Appl. Mech. Engrg., 193: 5301- 5338, 2004.
[4] V.D. da Silva. Viscoplastic regularization of a Cam-clay FE-implementation. In W. Wunderlich, editor, Proc. European Conf. on Computational Mechanics ECCM'99, pp. 250- 251, paper no. 422, Munich, 1999. Technical University of Munich.
[5] R. de Borst, M.-A. Abellan. Dispersion and internal length scales in strain-softening two-phase media. In G. Meschke et al., editors, Proc. EURO-C 2006 Int. Conf. Computational Modelling of Concrete Structures, pp. 549-556, London/Leiden, 2006. Taylor & Francis.
Published
Sep 27, 2022
How to Cite
STANKIEWICZ, Anna; PAMIN, Jerzy. Finite element analysis of fluid influence on instabilities in two-phase Cam-clay plasticity model. Computer Assisted Methods in Engineering and Science, [S.l.], v. 13, n. 4, p. 669-682, sep. 2022. ISSN 2956-5839. Available at: <https://cames.ippt.pan.pl/index.php/cames/article/view/897>. Date accessed: 22 nov. 2024.
Section
Articles