• Eugenio Oñate, F. Zárate, M.A. Celigueta, J.M. González, J. Miquel, J.M. Carbonell, F. Arrufat, S. Latorre, M. Santasusana
     

    Abstract

    In this chapter we present recent advances in the Discrete Element Method (DEM) and in the coupling of the DEM with the Finite Element Method (FEM) for solving a variety of problems in non linear solid mechanics involving damage, plasticity and multifracture situations.
  • A. Franci, Eugenio Oñate, J.M. Carbonell
     

    Abstract

    In this work, a unified updated Lagrangian formulation for solving fluid-structure interaction (FSI) problems is derived. The mixed velocity-pressure formulation for hypoelastic solids and quasi and fully incompressible Newtonian fluids is obtained as an extension of the velocity [...]
  • Eugenio Oñate, A. Franci, J.M. Carbonell
     

    Abstract

    We present a generalized Lagrangian formulation for analysis of industrial forming processes involving thermally coupled interactions between deformable continua. The governing equations for the deformable bodies are written in a unified manner that holds both for fluids and solids. [...]
  • Eugenio Oñate, M.A. Celigueta, S. Latorre, G. Casas, R. Rossi, J. Rojek
     

    Abstract

    We present a Lagrangian numerical technique for the analysis of flows incorporating physical particles of different sizes. The numerical approach is based on the Particle Finite Element Method (PFEM) which blends concepts from particle-based techniques and the FEM. The basis of the [...]
  • Eugenio Oñate, A. Franci, J.M. Carbonell
     

    Abstract

    We present a Lagrangian formulation for coupled thermal analysis of quasi and fully incompressible flows and fluid-structure interaction (FSI) problems that has excellent mass preservation features. The success of the formulation lays on a residual-based stabilized expression of the [...]
  • A. Llanos, Eugenio Oñate, F. Zárate
     

    Abstract

    Nowadays, there are programs offered by MAT-fem that calculate Euler-Bernoulli beams and Timoshenko beams for homogeneous material. The aim of this research is to achieve a new programme capable of calculating composite beams with Timoshenko theory. In chapter 1, composite materials [...]
  • M. Masó, Eugenio Oñate, F. Zárate
     

    Abstract

    This final studies work target is to contribute two new beam theories to MAT-fem[6], an educational developed program by CIMNE [5]. Until now the MAT-fem Beams program only offered the Euler-Bernoulli and Timoshenko beam theories for homogeneous materials. With this work, the Timoshenko [...]
  • F. Salazar, J. San Mauro, J. Irazábal, A. Larese, R. Rossi, Eugenio Oñate, R. Morán, M.A. Todelo
     

    Abstract

    El Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE) es un centro de investigación dependiente del Gobierno de Cataluña y de la Universidad Politécnica de Cataluña creado en 1987. Su principal actividad es el desarrollo y aplicación de métodos numéricos innovadores [...]
  • Eugenio Oñate, J. Marti, P. Ryzhakov, R. Rossi, S.R. Idelsoh
     

    Abstract

    A computational procedure for analysis of the melting, burning and flame spread of polymers under fire conditions is presented. The method, termed Particle Finite Element Method (PFEM), combines concepts from particle-based techniques with those of the standard finite element method [...]
  • Eugenio Oñate, J.M. Carbonell
     

    Abstract

    We present a mixed velocity-pressure finite element formulation for solving the updated Lagrangian equations for quasi and fully incompressible fluids. Details of the governing equations for the conservation of momentum and mass are given in both differential and variational form. [...]
  • N. M. Lafontaine, X.R. Wang, K.F. Huang, M.W. Yuan, Eugenio Oñate
     

    Abstract

    In non linear nite element analysis, traditional incremental or iterative method like the standard Newton-Raphson method (NR) is widely used to trace the right equilibrium path for nonlinear problems due to large geometry change and/or material behaviour. Common examples appear in [...]
  • J. Irazábal, F. Salazar, Eugenio Oñate
     

    Abstract

    The analysis of landslides in reservoirs is particularly interesting because the oscillation of the water surface elevation (especially rapid drawdowns) can foster their occurrence. The existence of the reservoir for a long enough time makes the material of the slopes turn saturated, [...]
  • M. Santasusana, Eugenio Oñate
     

    Abstract

    The Discrete Element Method is a relatively new technique that has nowadays and intense research in the field of numerical methods. In its first conception, the method was designed for simulations of dynamic system of particles where each element is considered to be an independent [...]
  • A. Eijo, Eugenio Oñate, S. Oller
     

    Abstract

    A new bilinear 4-noded quadrilateral element (called QLRZ) for the analysis of composite laminated and sandwich plates/shells based on the refined zigzag theory (RZT) proposed by Tessler et al. [1] is presented. The element has seven kinematic variables per node. Shear locking is [...]
  • Eugenio Oñate, C. Labra, F. Zárate, J. Rojek
     

    Abstract

    We present a new computational model for predicting the effect of blast loading on structures. The model is based in the adaptive coupling of the finite element method (FEM) and the discrete element method (DEM) for the accurate reproduction of multifracturing and failure of structures [...]
  • Eugenio Oñate
     

    Abstract

    En este trabajo se analizan algunas de las razones que dificultan y favorecen la transferencia de los resultados de la investigación que se desarrolla en entornos científicos al sector industrial. En concreto se analiza el proceso de la innovación y sus factores de impulso e inhibición. [...]
  • Eugenio Oñate, M.A. Celigueta, S.R. Idelsoh, F. Salazar, A. Larese, R. Rossi, B. Suárez, R. Morán
     

    Abstract

    We present some developments in the Particle Finite Element Method (PFEM) for analysis of coupled problems in mechanics involving fluid-soil-structure interaction (FSSI). The PFEM uses an updated Lagrangian description to model the motion of material points in both the fluid and the [...]
  • F. Salazar, R. Morán, R. Rossi, Eugenio Oñate
     

    Abstract

    Current paper focuses on the analysis of radial gated spillways, which are analyzed by the solution of a numerical model. The Oliana Dam study case is considered and the discharge capacity is predicted both by the application of a level-set based free-surface solver and by the use [...]

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