Within the framework of infinitesimal elasto-plasticity for describing concrete behaviour, this paper pro-poses a new non-local constitutive model. Particularly, a non-local integral-type regularization techniqueis applied to the three-invariant Menétrey-Willam model, here modified by the inclusion of a non-associated flow rule. The resulting model allows for taking into account the role of the intermediate prin-cipal stress and the Lode parameter, as well as to control inelastic dilatancy. A regularization scheme ishence introduced to circumvent strain localization and resolve the incapability of objectively describinglocalized material failure. One- and three-dimensional Finite Element analyses are developed to prove thesoundness of the novel implemented regularized scheme and the upgraded response with respect to alocal approach.

Integral-type regularization of non associated softening plasticity for quasi brittle materials

Mazzucco G.
;
Xotta G.;Salomoni V. A.;Majorana C.
2019

Abstract

Within the framework of infinitesimal elasto-plasticity for describing concrete behaviour, this paper pro-poses a new non-local constitutive model. Particularly, a non-local integral-type regularization techniqueis applied to the three-invariant Menétrey-Willam model, here modified by the inclusion of a non-associated flow rule. The resulting model allows for taking into account the role of the intermediate prin-cipal stress and the Lode parameter, as well as to control inelastic dilatancy. A regularization scheme ishence introduced to circumvent strain localization and resolve the incapability of objectively describinglocalized material failure. One- and three-dimensional Finite Element analyses are developed to prove thesoundness of the novel implemented regularized scheme and the upgraded response with respect to alocal approach.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3310088
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