Exploració per autor "Barbu, Lucia Gratiela"
Ara es mostren els items 1-20 de 30
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A numerical framework for modelling tire mechanics accounting for composite materials, large strains and frictional contact
Cornejo Velázquez, Alejandro; Mataix Ferrándiz, Vicente; Wriggers, Peter; Barbu, Lucia Gratiela; Oñate Ibáñez de Navarra, Eugenio (Springer, 2024-01)
Article
Accés obertWe present a general framework for the analysis and modelling of frictional contact involving composite materials. The study has focused on composite materials formed by a matrix of rubber and synthetic or metallic fibres, ... -
A rule of mixtures approach for delamination damage analysis in composite materials
Taherzadeh Fard, Alireza; Cornejo Velázquez, Alejandro; Jiménez Reyes, Sergio; Barbu, Lucia Gratiela (2023-09)
Article
Accés obertThe present study aims at investigating the delamination behavior of laminated composites in different loading modes within a homogenization theory of mixtures. The delamination damage phenomenon is introduced at the bulk ... -
A unified non-linear energy dissipation-based plastic-damage model for cyclic loading
Cornejo Velázquez, Alejandro; Jiménez Reyes, Sergio; Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Oñate Ibáñez de Navarra, Eugenio (2022-10)
Article
Accés obertA new energy-dissipation-based rate-independent constitutive law within the framework of elastoplasticity coupled with damage is proposed. With this methodology, the inelastic strains and the stiffness degradation exhibited ... -
Analysis of pre-tensioned structures by means of a constitutive Serial-Parallel rule of mixtures
Barbu, Lucia Gratiela; Escudero Torres, Cuauhtemoc; Cornejo Velázquez, Alejandro; Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (2017)
Text en actes de congrés
Accés obertThe main purpose of this paper is to develop a reliable method based on a three-dimensional (3D) finite-element (FE) model to simulate the constitutive behaviour of reinforced concrete structures strengthened with ... -
Analysis of the mock-up of a reactor containment building: comparison with experimental results
Jiménez Reyes, Sergio; Cornejo Velázquez, Alejandro; Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (2020-04)
Article
Accés obertThe results of a predictive analysis of the mock-up of a reactor containment building, based on computer numerical simulation, are presented in this paper and compared with the results obtained in the context of the VeRCoRs ... -
Analysis of ultra low cycle fatigue problems with the Barcelona plastic damage model
Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbu, Lucia Gratiela; Barbat Barbat, Horia Alejandro (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
Text en actes de congrés
Accés obertThis paper presents a plastic formulation based on the Barcelona plastic damage model capable of predicting the material failure due to Ultra Low Cycle Fatigue. This is achieved taking into account the fracture energy ... -
Analysis of ultra low cycle fatigue problems with the barcelona plastic damage model
Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbu, Lucia Gratiela; Barbat Barbat, Horia Alejandro (CIMNE, 2013)
Text en actes de congrés
Accés obertThis paper presents a plastic formulation based on the Barcelona plastic damage model ([1], [2]) capable of predicting the material failure due to Ultra Low Cycle Fatigue. This is achieved taking into account the fracture ... -
Analysis of Ultra Low Cycle Fatigue problems with the Barcelona plastic damage model and a new isotropic hardening law
Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbu, Lucia Gratiela; Barbat Barbat, Horia Alejandro; de Jesus, A.M.P. (2015-04)
Article
Accés obertThis paper presents a plastic-damage formulation and a new isotropic hardening law, based on the Barcelona plastic damage model initially proposed by Lubliner et al. (1989) [1], which is capable of predicting steel failure ... -
Análisis numérico de Eco-composites con procedimientos de homogeneización
Barbu, Lucia Gratiela; Martínez García, Javier; Oller Martínez, Sergio Horacio (2020-01)
Article
Accés obertLos procedimientos de homogeneización han ido ganando cada vez más énfasis en el campo del análisis numérico de los materiales compuestos. Un procedimiento de homogenización se basa sobre la hipótesis de que existe un set ... -
Coupled plastic damage model for low and ultra-low cycle seismic fatigue
Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
Text en actes de congrés
Accés obertThis paper presents the theoretical framework for a coupled plastic damage constitutive model valid for materials subjected to cyclic loads that lead to low and ultra-low cycle fatigue. Two numerical examples were presented ... -
El comportamiento de las presas de Baserca y Llauset en los nuevos escenarios energéticos
Suárez Arroyo, Benjamín; Miquel Canet, Juan; González Lopez, Jose Manuel; Barbu, Lucia Gratiela; Buil, J.M.; Rio, J.F.; Batlle, M.T. (Sociedad Española de Métodos Numéricos en Ingeniería (SEMNI), 2013)
Text en actes de congrés
Accés obertLas crecientes demandas energéticas están promoviendo nuevas estrategias comerciales en la explotación de las infraestructuras hidráulicas que se materializan aumentando el protagonismo de los saltos reversibles en la ... -
Failure pressure analysis of a nuclear reactor prestressed concrete containment building
Jiménez Reyes, Sergio; Cornejo Velázquez, Alejandro; Barbu, Lucia Gratiela; Barbat Barbat, Horia Alejandro; Oller Martínez, Sergio Horacio (Elsevier, 2021-06)
Article
Accés obertThe failure analysis of an existing and operational nuclear power plant reactor containment building subjected to an accident internal pressure is studied in this paper. The computation is based on the Finite Element Method ... -
Fatigue analysis of a naval composite structure
Jurado Granados, Joel; Martínez García, Javier; Barbu, Lucia Gratiela; Capua, Daniel di (CRC Press, 2020)
Text en actes de congrés
Accés restringit per política de l'editorialThe use of composite materials in marine industry has many potential benefits, such as lower weight. However, there are still some failure mechanisms, such as fatigue, that are not yet completely under- stood. This work ... -
Fatigue prediction of composite materials, based on serial/parallel mixing theory
Jurado Granados, Joel; Martínez García, Javier; Barbu, Lucia Gratiela; Capua, Daniel di (2022-03-31)
Article
Accés restringit per política de l'editorialIn this work, a numerical procedure to obtain the fatigue performance of composite laminates is proposed. The formulation used is based on the Serial/Parallel Mixing Theory (SP-RoM) and a fatigue damage model. The SP-RoM ... -
High cycle fatigue simulation: a new stepwise load-advancing strategy
Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (2015-08)
Article
Accés obertA stepwise load-advancing strategy for cyclic loading will be presented in this paper that yields convergence in reasonable computational time for highly nonlinear behaviour occurring past the S–N curve. The algorithm is ... -
High-cycle fatigue constitutive model and a load-advance strategy for the analysis of unidirectional fiber reinforced composites subjected to longitudinal loads
Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (2019-07)
Article
Accés obertA fatigue constitutive model valid for the composite constituent will be presented in this paper. The composite behaviour will be obtained by means of the serial/parallel mixing theory that is also used as a constitutive ... -
Large scale validation of a new isotropic hardening law for the barcelona plastic damage model under ultra low cycle fatigue conditions
Barbu, Lucia Gratiela; Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (CIMNE, 2015)
Text en actes de congrés
Accés obertThis paper presents the results of finite element simulations made on a bent pipe subjected to an in-plane variable cyclic displacement combined with internal pressure. The results of the numerical analyses will be compared ... -
Methodology for the analysis of post-tensioned structures using a constitutive serial-parallel rule of mixtures
Cornejo, Alejandro; Barbu, Lucia Gratiela; Escudero Torres, Cuauhtemoc; Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (2018-09)
Article
Accés obertThe main purpose of this paper is to develop a reliable method based on a three-dimensional (3D) finite-element (FE) model to simulate the constitutive behaviour of reinforced concrete structures strengthened with ... -
Methodology for the analysis of post-tensioned structures using a constitutive serial-parallel rule of mixtures: large scale non-linear analysis
Barbu, Lucia Gratiela; Cornejo Velázquez, Alejandro; Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (2019-05)
Article
Accés obertThe main purpose of this paper is to develop a reliable method based on a three-dimensional (3D) finite-element (FE) model to simulate the constitutive behaviour of reinforced concrete structures strengthened with ... -
Model-wise algorithm for the resolution of fatigue problems
Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (CIMNE, 2015)
Text en actes de congrés
Accés obertThe present work presents a general constitutive model formulation and a numerical algorithm for automatically selecting the appropriate coupling of damage and plasticity as a function of the number of cycles the material ...