Browsing by Author "Barbat Vlad, Gabriel"
Now showing items 1-12 of 12
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A comparative review of XFEM, mixed FEM and phase-field models for quasi-brittle cracking
(2022-03)
Article
Restricted access - publisher's policyIn this work, a critical comparison between three different numerical approaches for the computational modelling of quasi-brittle structural failure is presented. Among the many finite element approaches devised to solve ... -
Accurate thermal-induced structural failure analysis under incompressible conditions
(Elsevier, 2022-06)
Article
Restricted access - publisher's policyIn this work, the performance of the mixed 3-field displacement/deviatoric-strain/pressure (u/e/p) finite element is examined for nonlinear thermo-mechanical structural applications under incompressible behavior. The ... -
Appraisement of planar, bending and twisting cracks in 3D with isotropic and orthotropic damage models
(Springer, 2018-03)
Article
Open AccessThis paper discusses the modeling of cracking in quasi-brittle materials using isotropic and orthotropic damage constitutive laws. A mixed strain/displacement finite element formulation is used, taking advantage of its ... -
Architecture of a multi-crack model with full closing, reopening and sliding capabilities
(Springer, 2020-06)
Article
Open AccessThis paper discusses the finite element modeling of cracking of quasi-brittle materials under cyclic loading. A damage based crack model is proposed, which considers tensile and compressive damage, irreversible strains ... -
Finite element modeling of quasi-brittle cracks in 2D and 3D with enhanced strain accuracy
(2017-11)
Article
Open AccessThis paper discusses the finite element modeling of cracking in quasi-brittle materials. The problem is addressed via a mixed strain/displacement finite element formulation and an isotropic damage constitutive model. The ... -
Mixed finite elements with independent strain interpolation for isotropic and orthotropic damage
(Universitat Politècnica de Catalunya, 2021-02-11)
Doctoral thesis
Open AccessThe numerical modelling of fracture has been an active topic of research for over five decades. Most of the approaches employed rely on the use of the Finite Element Method, which has shown to be an effective and cost-efficient ... -
Un modelo de cálculo sísmico para pórticos de hormigón armado con muros de mampostería
(Universitat Politècnica de Catalunya, 2014-07-14)
Bachelor thesis
Open AccessA partir de un exhaustivo estudio del estado del conocimiento, en este trabajo se desarrolla un modelo para el análisis no lineal de estructuras porticadas de hormigón armado con muros de mampostería sometidas a acciones ... -
Un modelo no-lineal de homogeneización para pórticos de hormigón armado confinado - Tratamiento de la estructura como material compuesto
(Universitat Politècnica de Catalunya, 2016-06)
Master thesis
Open AccessEn este trabajo se desarrolla un modelo para el análisis de estructuras de barras de hormigón armado que considera el comportamiento no lineal de la armad ura longitudinal, de los cercos y del ... -
Objectivity in quasi-brittle structural failure via adaptive formulation and mesh refinement
(2022-12)
Article
Restricted access - publisher's policyIn this work, the combined implementation of Adaptive Formulation Refinement (AFR) and Adaptive Mesh Refinement (AMR) strategies is proposed for the efficient and mesh objective evaluation of quasi-brittle fracture. A ... -
Out-of-plane seismic response and failure mechanism of masonry structures using finite elements with enhanced strain accuracy
(Elsevier, 2019-03)
Article
Open AccessThe out-of-plane response is a complex and at the same time key aspect of the seismic vulnerability of masonry structures. It depends on several factors, some of which are the material properties, the quality of the walls, ... -
Stress, strain and dissipation accurate 3-field formulation for inelastic isochoric deformation
(2021-09)
Article
Open AccessThis work exploits the high accuracy of the mixed 3-field u/e/p formulation to address materially non-linear inelastic problems including isochoric deformations. Motivated by the strain-driven format of several constitutive ... -
Structural size effect: experimental, theoretical and accurate computational assessment
(Elsevier, 2020-06)
Article
Open AccessIn this paper, experimental evidence, theoretical predictions and the finite element modelling of the structural size effect in cracking problems of quasi-brittle materials are discussed and assessed against each other. ...
