Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/8271
Title: | Visco-elastic regularization and strain softening |
Author: | Cardoso, R. Silva, V. D. Varum, H. |
Keywords: | Regularization Visco-elasticity Elasto-plasticity Drucker-Prager Radial Return |
Issue Date: | 2006 |
Publisher: | Springer |
Abstract: | In this paper it is intended to verify the capacity of regularization of the numerical solution of an elasto-plastic problem with linear strain softening. The finite element method with a displacement approach is used. Drucker-Prager yield criteria is considered. The radial return method is used for the integration of the elasto-plastic constitutive relations. An elastovisco- plastic scheme is used to regularize the numerical solution. Two constitutive laws have been developed and implemented in a FE-program, the first represent the radial return method applied to Drucker-Prager yield criteria and the second is a time integration procedure for the Maxwell visco-elastic model. Attention is paid to finite deformations. An associative plastic flow is considered in the Drucker-Prager elasto-plastic model. The algorithms are tested in two problems with softening. Figures showing the capability of the algorithms to regularize the solution are presented. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/8271 |
DOI: | 10.1007/1-4020-5370-3_59 |
ISBN: | 978-1-4020-4994-1 |
Appears in Collections: | DECivil - Comunicações |
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