Browsing by Author "Baiges Aznar, Joan"
Now showing items 1-20 of 59
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A dynamic spring element model for the prediction of longitudinal failure of polymer composites
(2019-04)
Article
Open AccessA spring element model that takes into account the dynamic effects associated with fibre failure in composite materials is presented. The model is implemented in a parallel environment to allow a better performance in the ... -
A finite element reduced-order model based on adaptive mesh refinement and artificial neural networks
(John Wiley & sons, 2020-02)
Article
Open AccessIn this work, a reduced-order model based on adaptive finite element meshes and a correction term obtained by using an artificial neural network (FAN-ROM) is presented. The idea is to run a high-fidelity simulation by using ... -
A fractional step method for computational aeroacoustics using weak imposition of Dirichlet boundary conditions
(Elsevier, 2020-01)
Article
Open AccessIn this work we consider the approximation of the isentropic Navier–Stokes equations. The model we present is capable of taking into account acoustic and flow scales at once. After space and time discretizations have been ... -
A multi-criteria h-adaptive finite-element framework for industrial part-scale thermal analysis in additive manufacturing processes
(2022-12)
Article
Open AccessThis work presents an h-adaptive finite-element (FE) strategy to address the numerical simulation of additive manufacturing (AM) of large-scale parts. The wire-arc additive manufacturing is chosen as the demonstrative ... -
A numerical strategy to compute optical parameters in turbulent flow: application to telescopes
(2008-07-29)
Article
Open AccessWe present a numerical formulation to compute optical parameters in a turbulent air flow. The basic numerical formulation is a large eddy simulation (LES) of the incompressible Navier-Stokes equations, which are approximated ... -
A numerical strategy to compute optical parameters in turbulent flow: application to telescopes
(2010-01)
Article
Open AccessWe present a numerical formulation to compute optical parameters in a turbulent air flow. The basic numerical formulation is a large eddy simulation (LES) of the incompressible Navier–Stokes equations, which are approximated ... -
A posteriori error estimates in a finite element VMS-based reduced order model for the incompressible Navier-Stokes equations
(2021-03)
Article
Open AccessIn this paper we present an a posteriori error estimate for a reduced order model (ROM) for the incompressible Navier-Stokes equations that is based on the fact that the full order model is a finite element (FE) approximation. ... -
A scalable thermo-mechanical framework for the part-scale analysis in metal additive manufacturing processes
(2023)
Conference lecture
Open AccessThis work introduces an Additive Manufacturing (AM) Finite Element (FE) framework for the large-scale thermo-mechanical modeling of metal parts. Due to the complexity of the physical phe- nomenon and to meet the demands ... -
A stabilized mixed finite element approximation for incompressible finite strain solid dynamics using a total Lagrangian formulation
(2020-08)
Article
Open AccessIn this work a new methodology for both the nearly and fully incompressible transient finite strain solid mechanics problem is presented. To this end, the momentum equation is complemented with a constitutive law for the ... -
A stabilized mixed three-field formulation for stress accurate analysis including the incompressible limit in finite strain solid dynamics
(2023-05)
Article
Open AccessIn this work a new methodology for finite strain solid dynamics problems for stress accurate analysis including the incompressible limit is presented. In previous works, the authors have presented the stabilized mixed ... -
A variational multiscale stabilized finite element formulation for Reissner–Mindlin plates and Timoshenko beams
(Elsevier, 2023-05)
Article
Open AccessThe theories for thick plates and beams, namely Reissner–Mindlin’s and Timoshenko’s theories, are well known to suffer numerical locking when approximated using the standard Galerkin finite element method for small ... -
A VMS–based fractional step technique for the compressible Navier–Stokes equations using conservative variables
(2022-06)
Article
Open AccessIn this paper we address the compressible Navier–Stokes equations written in the so-called conservative formulation. In particular, we focus on the possibility of uncoupling the computation of the problem unknowns, namely, ... -
Adaptive finite element simulation of incompressible flows by hybrid continuous-discontinuous Galerkin formulations
(2013-02)
Article
Open AccessIn this work we design hybrid continuous-discontinuous finite element spaces that permit discontinuities on non-matching element interfaces of non-conforming meshes. Then, we develop an equal-order stabilized finite element ... -
An accurate approach to simulate friction stir welding processes using adaptive formulation refinement
(Elsevier, 2023-07-07)
Article
Restricted access - publisher's policyA novel Adaptive Formulation Refinement (AFR) strategy for Friction Stir Welding (FSW) problems is presented. In FSW, the accurate computation of strains is crucial to correctly predict the highly non-linear material ... -
An accurate, adaptive and scalable parallel finite element framework for the part-scale thermo-mechanical analysis in metal additive manufacturing processes
(Springer, 2023-10-06)
Article
Open AccessThis work introduces a distributed memory machine and octree-based Finite Element (FE) framework for modeling metal Additive Manufacturing (AM) processes. In this sense, an Adaptive Mesh Refinement (AMR) is used to accurately ... -
An adaptive Finite Element strategy for the numerical simulation of additive manufacturing processes
(Elsevier, 2021-01)
Article
Open AccessIn this work an adaptive Finite Element strategy to deal with the numerical simulation of Additive Manufacturing (AM) processes is presented. The Selective Laser Melting (SLM) is chosen as the reference technology because ... -
An adaptive fixed-mesh ALE method for free surface flows
(2017-01-01)
Article
Open AccessIn this work we present a Fixed-Mesh ALE method for the numerical simulation of free surface flows capable of using an adaptive finite element mesh covering a background domain. This mesh is successively refined and unrefined ... -
An embedded approach for the solution of the full potential equation with finite elements
(2022-01)
Article
Open AccessRecent developments in numerical simulations in the aerodynamics field are focused on reducing the computational cost of the solvers, targeting their use at the initial design steps. Under the right assumptions, potential ... -
An oil sloshing study: adaptive fixed-mesh ALE analysis and comparison with experiments
(Springer, 2019-05)
Article
Open AccessWe report in this work a numerical analysis of the sloshing of a squared tank partially filled with a domestic vegetable oil. The tank is subject to controlled motions with a shake table. The free-surface evolution is ... -
Approximation of acoustic black holes with finite element mixed formulations and artificial neural network correction terms
(Elsevier, 2024-11)
Article
Restricted access - publisher's policyWave propagation in elastodynamic problems in solids often requires fine computational meshes. In this work we propose to combine stabilized finite element methods (FEM) with an artificial neural network (ANN) correction ...
