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 Visco-elastic regularization and strain softening
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/8271

title: Visco-elastic regularization and strain softening
authors: 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.
URI: http://hdl.handle.net/10773/8271
ISBN: 978-1-4020-4994-1
publisher version/DOI: http://dx.doi.org/10.1007/1-4020-5370-3_59
source: ECCM-2006: III European Conference on Computational Mechanics: Solids, Structures and Coupled Problems in Engineering
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