Browsing by Author "Cervera Ruiz, Miguel"
Now showing items 1-20 of 122
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3D numerical modelling of twisting cracks under bending and torsion of skew notched beams
(2017-05)
Article
Open AccessThe testing of mode III and mixed mode failure is every so often encountered in the dedicated literature of mechanical characterization of brittle and quasi-brittle materials. In this work, the application of the mixed ... -
3D numerical models of FSW processes with non-cylindrical pin
(Taylor & Francis, 2015-06)
Article
Open AccessFriction Stir Welding (FSW) process is a relatively recent welding process (patented in 1991). FSW is a solid-state joining process during which materials to be joined are not melted. During the FSW process, the behaviour ... -
3D numerical models using a fluid or a solid formulation of FSW processes with a non-cylindrical pin
(Springer, 2015-12)
Article
Open AccessFriction Stir Welding (FSW) process is a relatively recent welding process (patented in 1991). FSW is a solid-state joining process during which materials to be joined are not melted. During the FSW process, the behaviour ... -
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 ... -
A computational model for progressive cracking in large dams due to the swelling of concrete
(1990-09)
Article
Open AccessThe paper presents a computational model for the analysis of large concrete gravity dams subjected to severe damage due to internal actions. It has been observed in several operating concrete dams that the combined effects ... -
A computational model for the numerical simulation of FSW processes
(Springer, 2010)
Conference report
Restricted access - publisher's policyIn this paper a computational model for the numerical simulation of Friction Stir Welding (FSW) processes is presented. FSW is a new method of welding in solid state in which a shouldered tool with a profile probe is rotated ... -
A crack-tracking technique for localized cohesive-frictional damage
(2015-12-01)
Article
Open AccessThis paper extends the use of crack-tracking techniques within the smeared crack approach for the numerical simulation of cohesive-frictional damage on quasi-brittle materials. The mechanical behaviour is described by an ... -
A fast and accurate two-stage strategy to evaluate the effect of the pin tool profile on metal flow, torque and forces in friction stir welding
(2017-03-01)
Article
Open AccessPin geometry is a fundamental consideration in friction stir welding (FSW). It influences the thermal behaviour, material flow and forces during the weld and reflects on the joint quality. This work studies four pin ... -
A general procedures for deriving thin plate bending elements with one degree of feedom por node
(1993-04)
Research report
Open Access -
A localized mapped damage model for orthotropic materials
(2014-05-08)
Article
Restricted access - publisher's policyThis paper presents an implicit orthotropic model based on the Continuum Damage Mechanics isotropic models. A mapping relationship is established between the behaviour of the anisotropic material and that of an isotropic ... -
A macro-modelling finite element technique for the realistic simulation of cracking in masonry structures
(CRC Press, 2016)
Conference report
Restricted access - publisher's policyThis paper presents an improved computational model for the analysis of masonry structures based on continuum mechanics finite element approaches. The proposed numerical technique uses a cracktracking algorithm to model ... -
A mixed stabilized finite element formulation for strain localization analysis
(2010)
Conference report
Open AccessThis work exploits the concept of stabilization techniques to improve the behaviour of either mixed or pu/mixed u/εlinear/linear triangular elements when strain localization analysis is required. Different stabilization ... -
A mixed three-field FE formulation for stress accurate analysis including the incompressible limit
(2015-01)
Article
Open AccessIn previous works, the authors have presented the stabilized mixed displacement/pressure formulation to deal with the incompressibility constraint. More recently, the authors have derived stable mixed stress/displacement ... -
A novel positive/negative projection in energy norm for the damage modeling of quasi-brittle solids
(2018-05)
Article
Open AccessThe asymmetric tensile/compressive material behavior and microcracks closure-reopening (MCR) effects exhibited by quasi-brittle solids are of significant importance to the nonlinear responses of engineering structures under ... -
A novel stress-accurate FE technology for highly non-linear analysis with incompressibility constraint: application to the numerical simulation of the FSW process
(American Institute of Physics (AIP), 2013)
Conference report
Restricted access - publisher's policyIn this work a novel finite element technology based on a three-field mixed formulation is presented. The Variational Multi Scale (VMS) method is used to circumvent the LBB stability condition allowing the use of linear ... -
A phenomenological model for the solidification of eutectic and hypoeutectic alloys including recalescence and undercooling
(2018-05)
Article
Open AccessIn this work, a novel phenomenological model is proposed to study the liquid-to-solid phase change of eutectic and hypoeutectic alloy compositions. The objective is to enhance the prediction capabilities of the solidification ... -
A rate-dependent isotropic damage model for the seismic analysis of concrete dams
(Wiley, 1996-09)
Article
Open AccessIn this paper a rate-dependent isotropic damage model developed for the numerical analysis of concrete dams subjected to seismic excitation is presented. The model is shown to incorporate two features essential for seismic ... -
A strain-based plastic viscous-damage model for massive concrete structures
(1998-05)
Article
Open AccessWithin the framework of continuum damage mechanics, a new constitutive damage model for massive concrete is presented, mainly intended for the seismic analysis of gravity and arch dams. Consistent with thermodynamic ... -
A strategy for the numerical simulation of metal deposition and multi-pass welding processes
(Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2009)
Conference report
Restricted access - publisher's policyIn this work a numerical model is developed to accurately predict temperature evolution and distortions associated to the successive welding layers deposited during the multi-pass welding and metal deposition processes (MD). -
A thermodynamically consistent plastic-damage framework for localized failure in quasi-brittle solids: material model and strain localization analysis
(2016-06)
Article
Open AccessAiming for the modeling of localized failure in quasi-brittle solids, this paper addresses a thermodynamically consistent plastic-damage framework and the corresponding strain localization analysis. A unified elastoplastic ...
