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Title: Visco-elastic regularization and strain softening
Author: Cardoso, R.
Silva, V. D.
Varum, H.
Keywords: Regularization
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
DOI: 10.1007/1-4020-5370-3_59
ISBN: 978-1-4020-4994-1
Appears in Collections:DECivil - Comunicações

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