A general framework for softening regularisation based on gradient elasticity
Visualitza/Obre
10.1016/j.ijsolstr.2011.01.022
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/12491
Tipus de documentArticle
Data publicació2011-05-01
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
A general non-local approach to regularise strain-softening continua is presented.
The key idea is to introduce the gradient-type enrichment at the level of displacements (rather than some internal variable), so the model is formulated
with two distinct displacement fields. In fact, gradient models based on two displacement fields are usual in non-local elasticity, where the goal is to avoid the shortcomings of classical (local) elasticity (i.e. strain singularities in statics, non-dispersive behaviour in dynamics). We show that such a gradient elasticity backbone model can be combined with any standard nonlinear constitutive driver to render a regularised model for softening inelasticity.
To illustrate the generality of the approach, two prototype models (isotropic
damage and von Mises plasticity) are discussed. The numerical examples show that the regularised models exhibit all of the desired features: mesh insensitivity, imperfection size insensitivity and description of size effects.
CitacióRodríguez, A. [et al.]. A general framework for softening regularisation based on gradient elasticity. "International journal of solids and structures", 01 Maig 2011, vol. 48, núm. 9, p. 1382-1394.
ISSN0020-7683
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
IJSS_ARF_TB_HA_ETM_2011.pdf | 2,183Mb | Visualitza/Obre |