Documents published in Scipedia

• Thermo‐mechanical analysis of industrial solidification processes

  M. Cervera, C. Agelet de Saracibar, M. Chiumenti

  (1999). Research Report, Nº PI153

  
  

  Abstract

  The paper presents an up‐to‐date finite element numerical model for fully coupled thermo‐mechanical problems, focussing in the simulation of solidification processes of industrial metal parts. The proposed constitutive model is defined by a thermo‐visco‐elasto‐(visco)plastic free energy function which includes a contribution for thermal multiphase changes. Mechanical and thermal properties are assumed to be temperature‐dependent, and viscous‐like strains are introduced to account for the variation of the elastic moduli during the cooling process. The continuous transition between the initial fluid‐like and the final solid‐like behaviour of the part is modelled by considering separate viscous and elasto‐plastic responses as a function of the solid fraction. Thermo‐mechanical contact conditions between the mould and the part are specifically considered, assuming that the heat flux is a function of the normal pressure and the thermal and mechanical gaps. A fractional step method arising from an operator split of the governing equations is used to solve the non‐linear coupled system of equations, leading to a staggered product formula solution algorithm suitable for large‐scale computations. Representative simulations of industrial solidification processes are shown, and comparison of computed results using the proposed model with available experimental data is given.

  Abstract
  The paper presents an up‐to‐date finite element numerical model for fully coupled thermo‐mechanical problems, focussing in the simulation of solidification processes [...]

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• On the constitutive modeling of coupled thermomechanical phase-change problems

  C. Agelet de Saracibar, M. Cervera, M. Chiumenti

  (1999). Research Report, Nº PI163

  
  

  Abstract

  This paper deals with a thermodynamically consistent numerical formulation for coupled thermoplastic problems including phase-change phenomena and frictional contact. The final goal is to get an accurate, efficient and robust numerical model, able for the numerical simulation of industrial solidification processes. Some of the current issues addressed in the paper are the following. A fractional step method arising from an operator split of the governing differential equations has been used to solve the nonlinear coupled system of equations, leading to a staggered product formula solution algorithm. Nonlinear stability issues are discussed and isentropic and isothermal operator splits are formulated. Within the isentropic split, a strong operator split design constraint is introduced, by requiring that the elastic and plastic entropy, as well as the phase-change induced elastic entropy due to the latent heat, remain fixed in the mechanical problem. The formulation of the model has been consistently derived within a thermodynamic framework. All the material properties have been considered to be temperature dependent. The constitutive behavior has been defined by a thermoviscous/elastoplastic free energy function, including a thermal multiphase change contribution. Plastic response has been modeled by a J2 temperature dependent model, including plastic hardening and thermal softening. The constitutive model proposed accounts for a continuous transition between the initial liquid state, the intermediate mushy state and the final solid state taking place in a solidification process. In particular, a pure viscous deviatoric model has been used at the initial fluid-like state. A thermomecanical contact model, including a frictional hardening and temperature dependent coupled potential, is derived within a fully consistent thermodinamical theory. The numerical model has been implemented into the computational finite element code COMET developed by the authors. Numerical simulations of solidification processes show the good performance of the computational model developed.

  Abstract
  This paper deals with a thermodynamically consistent numerical formulation for coupled thermoplastic problems including phase-change phenomena and frictional contact. The [...]

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• Softening, localization and stabilization: capture of discontinuous solutions in J2 plasticity

  M. Cervera, M. Chiumenti, C. Agelet de Saracibar

  (2003). Research Report, Nº PI227

  
  

  Abstract

  This paper exploits the concept of stabilization techniques to improve the behaviour of mixed linear/linear simplicial elements (triangles and tetrahedra) in incompressible or nearly incompressible situations. Elasto‐J2‐plastic constitutive behaviour has been considered with linear and exponential softening. Two different stabilization methods are used to attain global stability of the corresponding discrete finite element formulation. Implementation and computational aspects are also discussed, showing that a robust application of the proposed formulation is feasible. Numerical examples show that the formulation derived is free of volumetric locking and spurious oscillations of the pressure. The results obtained do not suffer from spurious mesh‐size or mesh‐bias dependence, comparing very favourably with those obtained with the standard, non‐stabilized, approaches.

  Abstract
  This paper exploits the concept of stabilization techniques to improve the behaviour of mixed linear/linear simplicial elements (triangles and tetrahedra) in incompressible [...]

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• Numerical modelling of sheet metal forming problems

  E. Oñate, C. Agelet de Saracibar

  (1991). Numerical Modelling of Material Deformations Processes, C. Sturgess et al (Eds.), Springer Verlag, London

  
  

  Abstract

  Stamping of sheet-metal parts by means of punches and dies is a standard manufacturing process. However, despite its broad application in industry, the design of forming processes is still largely based on experimental techniques, such as the use of circular grid systems (Keeler 1968) or forming limit diagrams (Hecker 1973, Keeler 1974).

  Abstract
  Stamping of sheet-metal parts by means of punches and dies is a standard manufacturing process. However, despite its broad application in industry, the design of forming processes [...]

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• Finite element analysis of sheet metal forming problems using a viscous voided shell formulation

  E. Oñate, C. Agelet de Saracibar

  (1988). Modelling of Metal Forming Processes, J.L. Chenot y E. Oñate (Eds.), Kluwer Academic Publisher, pp. 163-178

  
  

  Abstract

  A formal analogy between the equations of pure plastic and viscoplastic flow theory for void containing metals and those of standard non linear elasticity is presented. It is shown how by direct simplifications of the general equations, the standard incompressible flow expressions for non voided metals are obtained. The general formulation is particularized for the analysis of sheet metal forming problems and details of the viscous voided shell and membrane formulations for dealing with the axisymmetric case are given. Finally, some examples of applications of pure and hemispherical stretching and deep drawing of a circular sheet axe presented.

  Abstract
  A formal analogy between the equations of pure plastic and viscoplastic flow theory for void containing metals and those of standard non linear elasticity is presented. It [...]

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• On the orthogonal subgrid scale pressure stabilization of small and finite deformation J2 Plasticity

  C. Agelet de Saracibar, M. Chiumenti, M. Cervera, Q. Valverde

  Monograph Series on Computational Modeling of Forming Processes, editor C. Agelet (2004). CMFP2, ISBN: 84-95999-62-5

  
  

  Abstract

  The use of stabilization methods is becoming an increasingly well-accepted technique due to their success in dealing with numerous numerical pathologies that arise in a variety of applications in computational mechanics. In this monograph a multiscale finite element method technique to deal with pressure stabilization of nearly incompressibility problems in nonlinear solid mechanics at small and finite deformations J2 plasticity is presented. A mixed formulation involving pressure and displacement fields is used as starting point. Within the finite element discretization setting, continuous linear interpolation for both fields is considered. To overcome the Babuˇska-Brezzi stability condition, a multiscale stabilization method based on the Orthogonal Subgrid Scale (OSGS) technique is introduced. Suitable nonlinear expression of the stabilization parameters are proposed. The main advantage of the method is the possibility of using linear triangular or tetrahedral finite elements, which are easy to generate and, therefore, very convenient for practical industrial applications. Numerical results obtained using the OSGS stabilization technique are compared with results provided by the P1 standard Galerkin displacements linear triangular/tehrahedral element, P1/P1 standard mixed linear displacements/ linear pressure triangular/tetrahedral element and Q1/P0 mixed bilinear/ trilinear displacements/constant pressure quadrilateral/hexahedral element for 2D/3D nearly incompressible problems in the context of nonlinear small and finite deformation J2 plasticity models.

  Abstract
  The use of stabilization methods is becoming an increasingly well-accepted technique due to their success in dealing with numerous numerical pathologies that arise in [...]

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• On the Computational Modeling and Numerical Simulation of FSW Processes

  C. Agelet de Saracibar, M. Chiumenti, M. Cervera, N. Dialami, D. Santiago, G. Lombera

  Monograph Series on Computational Modeling of Forming Processes, editor C. Agelet (2012). CMFP3, ISBN 84-939640-0-9

  
  

  Abstract

  This paper deals with the computational modeling and numerical simulation of the material flow around the probe tool in a Friction Stir Welding (FSW) process. Within the paradigmatic framework of the multiscale stabilization methods, suitable subgrid scale stabilized coupled thermomechanical formulations have been developed using an Eulerian description. Norton-Hoff and Sheppard-Wright thermo-rigid-viscoplastic constitutive material models have been considered. Constitutive equations for the subgrid scale models have been proposed and an approximation of the subgrid scale variables has been given. In particular Algebraic Subgrid Scale (ASGS) and Orthogonal Subgrid Scale (OSGS) methods for P1/P1/P1 linear elements have been considered. Furthermore, it has been shown that well known classical stabilized formulations, such as the Galerkin Least-Squares (GLS) or Streamline Upwind/Petrov-Galerkin (SUPG) methods, can be recovered as particular cases of the multiscale stabilization framework considered. Within the framework of a product formula algorithm, the resulting algebraic system of equations has been solved using a staggered procedure, in which a mechanical problem, defined by the plastic strain rate incompressibility equation and the quasi-static linear momentum balance equation, is solved at a constant temperature and a thermal problem, defined by the energy balance equation, is solved keeping constant the mechanical variables. The computational model has been implemented in the in-house developed FE software COMET. An assessment of the influence of the thermal deformation in the formulation has been carried out. Results obtained show that the influence of the thermal deformation is very small and can be neglected, getting a fully incompressible formulation. Finally, the computational model implemented in COMET has been validated through a number of examples, including a 3D numerical simulation of a FSW process. Numerical results obtained have been compared with experimental results available in the literature. A good agreement on the temperature distribution has been obtained and predicted peak temperatures compare well, both in value and position, with the experimental results available.

  Abstract
  This paper deals with the computational modeling and numerical simulation of the material flow around the probe tool in a Friction Stir Welding (FSW) process. Within the paradigmatic [...]

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• Numerical analysis of the manufacturing processes of a mock-up of the ITER NHF First Wall Panel

  J. González, M. Chiumenti, M. Cervera, C. Agelet de Saracibar, F. Samaniego, I. Cobo

  Fusion Engineering and Design (2018). (preprint) Vol. 135, Part A, pp. 65-73

  
  

  Abstract

  The objective of ITER is to build a new Tokamak, with the goal of demonstrating the scientific and technical feasibility of fusion power. The First Wall Panels are the inner component of the reactor, built with different materials that must support high heat flux levels inside the vacuum vessel. The manufacturing processes of the First Wall are a complex procedure including bending, hipping and cutting procedures which, in general, lead to residual stresses and distortions of the fabricated component. In this work, the analysis of the thermo-mechanical response of a simplified prototype of the ITER NHF First Wall Panel is presented from the numerical point of view. The experimental procedure within each phase of the whole manufacturing process is described. Residual stresses and distortions have been measured and analyzed. The numerical simulation of the manufacturing process includes the description of the main hypothesis, the applied loads and the boundary conditions assumed at every stage of the process. Special attention is paid to the simulation of machining and cutting by means of an ad-hoc element deactivation strategy. The numerical results are compared with the experimental evidence to show the prediction capability and the limitations of the proposed numerical model.

  Abstract
  The objective of ITER is to build a new Tokamak, with the goal of demonstrating the scientific and technical feasibility of fusion power. The First Wall Panels are the inner [...]

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• A fast and accurate two-stage strategy to evaluate the effect of the pin tool profile on metal flow, torque and forces during friction stir welding

  N. Dialami, M. Cervera, M. Chiumenti, C. Agelet de Saracibar

  Int. J. Mechanical Sciences (2017). (preprint) Vol. 122, pp. 215–227

  
  

  Abstract

  Pin 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 tools with circular, triflute, trivex, and triangular profiles adopting a validated model of FSW process developed by the authors. The effect of the rotating tool geometry on the flow behaviour and process outcomes is analysed. Additionally, longitudinal and transversal forces and torque are numerically calculated and compared for the different pin shapes. The study is carried out for slip and stick limiting friction cases between pin and workpiece. The main novelties of the paper are a “speed-up” two-stage simulation methodology and a piecewise linear version of the constitutive model, both of them conceived for the use in real case industrial applications, where the achievement of accuracy with affordable simulation times is of importance. The Norton-Hoff constitutive model is adopted to characterize the material behaviour during the weld. The piecewise linear version of the model developed by the authors greatly facilitates the convergence of the numerical solution ensuring both computational efficiency and accuracy. A two-stage computational procedure is applied. In the first stage, a forced transient is carried out; in the second one, the magnitudes of interest are computed. The study shows that the proposed modelling approach can be used to predict and interpret the FSW behaviour for a specific pin geometry. Moreover, the reduction of the simulation time using the two-stage strategy can be up to 90%, compared to a standard single stage strategy.

  Abstract
  Pin geometry is a fundamental consideration in friction stir welding (FSW). It influences the thermal behaviour, material flow and forces during the weld and [...]

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• Local–global strategy for the prediction of residual stresses in FSW processes

  N. Dialami, M. Cervera, M. Chiumenti, C. Agelet de Saracibar

  International Journal of Advanced Manufacturing Technology (2017). (preprint) Vol. 88 (9), pp. 3099–3111

  
  

  Abstract

  This work describes the local–global strategy proposed for the computation of residual stresses in friction stir welding (FSW) processes. A coupling strategy between the analysis of the process zone nearby the pin tool (local level analysis) and the simulation carried out for the entire structure to be welded (global level analysis) is implemented to accurately predict the temperature histories and, thereby, the residual stresses in FSW. As a first step, the local problem solves the material stirring as well as the heat generation induced by the pin and shoulder rotation at the heat affected zone. The Arbitrary Lagrangian Eulerian (ALE) formulation is adopted to deal with the rotation of complex pin shapes. A thermo-rigid-viscoplastic constitutive law is employed to characterize the viscous flow of the material, driven by the high-strain rates induced by the FSW process. A mixed temperature–velocity–pressure finite element technology is used to deal with the isochoric nature of the strains. The output of this local analysis is the heat generated either by plastic dissipation or by friction, and it is used as the power input for the welding analysis at structural (global) level. The global problem is tackled within the Lagrangian framework together with a thermo-elasto-viscoplastic constitutive model. In addition, in this case, the mixed temperature–displacement–pressure format is introduced to deal with the deviatoric nature of the plastic strains. The outcomes of this analysis are the distortions and the residual stresses after welding. The material used in this work is stainless steel 304 L; however, the methodology presented is applicable to a wide range of materials. The proposed numerical strategy is validated by the experimental evidence.

  Abstract
  This work describes the local–global strategy proposed for the computation of residual stresses in friction stir welding (FSW) processes. A coupling strategy between [...]

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Articles (Documents not available in Scipedia)

• Challenges in thermo-mechanical analysis of Friction Stir Welding processes

  N. Dialami, M. Chiumenti, M. Cervera, C. Agelet de Saracibar

  Archives of Computational Methods in Engineering Volume 24, Issue 1, January 2017, Pages 189–225. First published on-line: 19 January 2016. http://dx.doi.org/10.1007/s11831-015-9163-y

• Local-global strategy for the prediction of residual stresses in FSW processes

  N. Dialami, M. Cervera, M. Chiumenti, C. Agelet de Saracibar

  International Journal of Advanced Manufacturing Technology Volume 88, Issue 9, February 2017, Pages 3099–3111. First published on-line: 14 June 2016. http://dx.doi.org/10.1007/s00170-016-9016-3

• 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

  N. Dialami, M. Cervera, M. Chiumenti, C. Agelet de Saracibar

  International Journal of Mechanical Sciences Volume 122, March 2017, Pages 215-227. Available on-line: 16 January 2017. http://dx.doi.org/10.1016/j.ijmecsci.2016.12.016

• 3D Numerical models of FSW processes with non-cylindrical pin

  P. Bussetta, N. Dialami, M. Chiumenti, C. Agelet de Saracibar, M. Cervera, J.P. Ponthot

  Advances in Materials and Processing Technologies Volume 1, Issue 3-4, January 2016, Pages 275-287. First published on-line: 1 February 2016. http://dx.doi.org/10.1080/2374068X.2015.1121035

• Numerical modeling of the electron beam welding process and its experimental validation

  M. Chiumenti, M. Cervera, N. Dialami, B. Wu, L. Jinwei, C. Agelet de Saracibar

  Finite Elements in Analysis and Design Volume 121, 15 November 2016, Pages 118–133. First published on-line: 20 September 2016. http://dx.doi.org/10.1016/j.finel.2016.07.003

• 3D Numerical models using a fluid or a solid formulation of FSW processes with a non-cylindrical pin

  P. Bussetta, N. Dialami, M. Chiumenti, C. Agelet de Saracibar, M. Cervera, R. Boman, J.P. Ponthot

  Special issue on Simulation Techniques for Process Modeling Guest Editors: Ton van den Boogaard, Stefanie Reese Advanced Modeling and Simulation in Engineering Sciences Volume 2, Article 27, December 2015. First published on-line: 18 November 2015. http://dx.doi.org/10.1186/s40323-015-0048-2

• Software solutions for ICME

  G.J. Schmitz, A. Engstrom, R. Bernhardt, U. Prahl, L. Adam, J. Seyfarth, M. Apel, C. Agelet de Saracibar, P. Korzhavyi, J. Agren, B. Patzak

  The Journal of The Minerals, Metals & Materials Society (TMS) Volume 68, Issue 1, January 2016, Pages 70-76. First published on-line: 30 November 2015. http://dx.doi.org/10.1007/s11837-015-1718-8

• Computational modeling and sub-grid scale stabilization of incompressibility and convection in the numerical simulation of friction stir welding processes

  C. Agelet de Saracibar, M. Chiumenti, M. Cervera, N. Dialami, A. Seret

  Archives of Computational Methods in Engineering Volume 21, Issue 1, March 2014, Pages 3-37. First published on-line: 2 February 2014. http://dx.doi.org/10.1007/s11831-014-9094-z

• A direct elimination algorithm for quasi-static and dynamic contact problems

  D. Di Capua, C. Agelet de Saracibar

  Finite Elements in Analysis and Design Volume 93, Issue 1, January 2015, Pages 107-125. First published on-line: 8 October 2014. http://dx.doi.org/10.1016/j.finel.2014.09.001

• An apropos kinematic framework for the numerical modeling of friction stir welding

  N. Dialami, M. Chiumenti, M. Cervera, C. Agelet de Saracibar

  Computers & Structures Volume 117, February 2013, Pages 48-57. First published on-line: 4 January 2013. http://dx.doi.org/10.1016/j.compstruc.2012.12.006

• A numerical model for the simulation of precipitates dissolution of hardened aluminium alloys using neural networks

  C. Agelet de Saracibar, R. López, B. Ducoeur, M. Chiumenti, B. de Meester

  Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería Volume 29, Issue 1, January-March 2013, Pages 29-37. First published on-line: 22 February 2013. http://dx.doi.org/10.1016/j.rimni.2012.02.003

• Comparison of a fluid and a solid approach for the numerical simulation of friction stir welding with a non-cylindrical pin

  P. Bussetta, N. Dialami, R. Boman, M. Chiumenti, C. Agelet de Saracibar, M. Cervera, J.P. Ponthot

  Steel Research International Volume 85, Issue 6, June 2014, Pages 968-979. First published on-line: 13 December 2013. http://dx.doi.org/10.1002/srin.201300182

• Material flow visualization in friction stir welding via particle tracing

  N. Dialami, M. Chiumenti, M. Cervera, C. Agelet de Saracibar, J.P. Ponthot

  International Journal of Material Forming Volume 8, Issue 2, 1 April 2015, Pages 167-181. First published on-line: 20 December 2013. http://dx.doi.org/10.1007/s12289-013-1157-4

• Numerical modeling of friction stir welding processes

  M. Chiumenti, M. Cervera, C. Agelet de Saracibar, N. Dialami

  Computer Methods in Applied Mechanics and Engineering Volume 254, February 2013, Pages 353-369. First published on-line: 10 October 2012. http://dx.doi/org/10.1016/j.cma.2012.09.013

• Modelado termomecánico del proceso de friction stir welding utilizando la geometría real de la herramienta

  D. Santiago, G. Lombera, S. Urquiza, C. Agelet de Saracibar, M. Chiumenti

  Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería Volume 26, Issue 4, 2010, Pages 293-303

• Finite element modeling of multi-pass welding and shaped metal deposition processes

  M. Chiumenti, M. Cervera, A. Salmi, C. Agelet de Saracibar, N. Dialami, K. Matsui

  Computer Methods in Applied Mechanics and Engineering Volume 199, Issues 37-40, 1 August 2010, Pages 2343-2359. First published on-line: 14 April 2010. http://dx.doi.org/10.1016/j.cma.2010.02.018

• Modeling precipitate dissolution in hardened aluminium alloys using neural networks

  R. López, B. Ducoeur, M. Chiumenti, B. de Meester, C. Agelet de Saracibar

  International Journal of Material Forming Volume 1, Issue 1 Supplement, April 2008, Pages 1291-1294. First published on-line: April 2008. http://dx.doi.org/10.1007/s12289-008-0139-4

• On the numerical modeling of the thermomechanical contact for metal casting analysis

  M. Chiumenti, C. Agelet de Saracibar, M. Cervera

  Journal of Heat Transfer Volume 130, Issue 6, 23 April 2008, Art. No. 061301.1-10. First published on-line: 23 April 2008. http://dx.doi.org/10.1115/1.2897923

• Current developments on the coupled thermomechanical computational modeling of metal casting processes

  C. Agelet de Saracibar, M. Chiumenti, M. Cervera

  Computer Methods in Materials Science Volume 6, Issues 1-2, 2006, Pages 15-25

• Formulación estabilizada de elementos finitos triangulares y tetraédricos para problemas de incompresibilidad en grandes deformaciones

  Q. Valverde, M. Chiumenti, C. Agelet de Saracibar, M. Cervera

  Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería Volume 22, Issue 3, 2006, Pages 335-348

• Discrete element modelling and simulation of sand mould manufacture for the lost foam process

  J. Rojek, F. Zarate, C. Agelet de Saracibar, C. Gilbourne, P. Verdot

  International Journal for Numerical Methods in Engineering Volume 62, Issue 11, 21 March 2005, Pages 1421-1441. First published on-line: 1 December 2004. http://dx.doi.org/10.1002/nme.1221

• Formulación estabilizada de elementos finitos triangulares y tetraédricos para problemas de incompresibilidad en deformaciones infinitesimales

  Q. Valverde, M. Chiumenti, M. Cervera, C. Agelet de Saracibar

  Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería Volume 21, Issue 4, 2005, Pages 345-363

• On the orthogonal subgrid scale pressure stabilization of finite deformation J2 plasticity

  C. Agelet de Saracibar, M. Chiumenti, Q. Valverde, M. Cervera

  Computer Methods in Applied Mechanics and Engineering Volume 195, Issues 9-12, 1 February 2006, Pages 1224-1251. First published on-line: 15 June 2005. http://dx.doi.org/10.1016/j.cma.2005.04.007

• A stabilized formulation for incompressible plasticity using linear triangles and tetrahedra

  M. Chiumenti, Q. Valverde, C. Agelet de Saracibar, M. Cervera

  International Journal of Plasticity Volume 20, Issues 8-9, August-September 2004, Pages 1487-1504. First published on-line: 19 December 2003. http://dx.doi.org/10.1016/j.ijplas.2003.11.009

• Shear band localization via local J2 continuum damage mechanics

  M. Cervera, M. Chiumenti, C. Agelet de Saracibar

  Computer Methods in Applied Mechanics and Engineering Volume 193, Issues 9-11, 5 March 2004, Pages 849-880. First published on-line: 28 January 2004. http://dx.doi.org/10.1016/j.cma.2003.11.009

• Softening, localization and stabilization: Capture of discontinuous solutions in J2 plasticity

  M. Cervera, M. Chiumenti, C. Agelet de Saracibar

  International Journal for Numerical and Analytical Methods in Geomechanics Volume 28, Issue 5, 25 April 2004, Pages 373-393. First published on-line: 14 April 2004. http://dx.doi.org/10.1002/nag.341

• Mixed linear/linear simplicial elements for incompressible elasticity and plasticity

  M. Cervera, M. Chiumenti, Q. Valverde, C. Agelet de Saracibar

  Computer Methods in Applied Mechanics and Engineering Volume 192, Issues 49-50, 5 December 2003, Pages 5249-5263. First published on-line: 8 October 2003. http://dx.doi.org/10.1016/j.cma.2003.07.007

• A stabilized formulation for incompressible elasticity using linear displacement and pressure interpolations

  M. Chiumenti, Q. Valverde, C. Agelet de Saracibar, M. Cervera

  Computer Methods in Applied Mechanics and Engineering Volume 191, Issue 46, 8 November 2002, Pages 5253-5264. First published on-line: 22 October 2002. http://dx.doi.org/10.1016/S0045-7825(02)00443-7

• On the constitutive modeling of coupled thermomechanical phase-change problems

  C. Agelet de Saracibar, M. Cervera, M. Chiumenti

  Special Issue on Computational Modeling of Forming Processes International Journal of Plasticity Volume 17, Issue 12, December 2001, Pages 1565-1622. First published on-line: 16 October 2001. http://dx.doi.org/10.1016/S0749-6419(00)00094-2

• On the formulation of coupled thermoplastic problems with phase-change

  C. Agelet de Saracibar, M. Cervera, M. Chiumenti

  International Journal of Plasticity Volume 15, Issue 1, March 1999, Pages 1-34. First published on-line: 10 March 1999. http://dx.doi.org/10.1016/S0749-6419(98)00055-2

• On the numerical modeling of frictional wear phenomena

  C. Agelet de Saracibar, M. Chiumenti

  Computer Methods in Applied Mechanics and Engineering Volume 177, Issues 3-4, 20 July 1999, Pages 401-426. First published on-line: 30 May 2000. http://dx.doi.org/10.1016/S0045-7825(98)00390-9

• Thermo-mechanical analysis of industrial solidification processes

  M. Cervera, C. Agelet de Saracibar, M. Chiumenti

  International Journal for Numerical Methods in Engineering Volume 46, Issue 9, 30 November 1999, Pages 1575-1591. First published on-line: 19 October 1999. http://dx.doi.org/10.1002/(SICI)1097-0207(19991130)46:9<1575::AID-NME713>3.0.CO;2-D

• Numerical analysis of coupled thermomechanical frictional contact problems. Computational model and applications

  C. Agelet de Saracibar

  Archives of Computational Methods in Engineering Volume 5, Issue 3, September 1998, Pages 243-301

• A new frictional time integration algorithm for large slip multi-body frictional contact problems

  C. Agelet de Saracibar

  Computer Methods in Applied Mechanics and Engineering Volume 142, Issues 3-4, 30 March 1997, Pages 303-334. First published on-line: 6 May 1999. http://dx.doi.org/10.1016/S0045-7825(96)01133-4

• Comparative study on sheet metal forming processes by numerical modelling and experiment

  W. Sosnowski, E. Oñate, C. Agelet de Saracibar

  Journal of Materials Processing Technology Volume 34, Issues 1-4, September 1992, Pages 109-116. First published on-line: 27 February 2003. http://dx.doi.org/10.1016/0924-0136(92)90096-B

• Análisis por elementos finitos de procesos de embutición de chapa mediante un modelo viscoplástico con degradación por huecos

  E. Oñate, C. Agelet de Saracibar, J.B. Dalin

  Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería Volume 6, Issue 1, 1990, Pages 7-23

• Finite element analysis of sheet metal forming problems using a selective viscous bending/membrane formulation

  E. Oñate, C. Agelet de Saracibar

  International Journal for Numerical Methods in Engineering Volume 30, Issue 8, December 1990, Pages 1577-1593. First published on-line: 24 June 2005. http://dx.doi.org/10.1002/nme.1620300815

• Plastic and viscoplastic flow of void‐containing metals. Applications to axisymmetric sheet forming problems

  E. Oñate, M. Kleiber, C. Agelet de Saracibar

  International Journal for Numerical Methods in Engineering Volume 25, Issue 1, January 1988, Pages 227-251. First published on-line: 23 June 2005. http://dx.doi.org/10.1002/nme.1620250118

Books, book chapters and edited books (Documents not available in Scipedia)

• Continuum Mechanics for Engineers: Theory and Problems

  X. Oliver, C. Agelet de Saracibar

  Barcelona, Second Edition, 2017, 536 pp DOI: 10.13140/RG.2.2.25821.20961

• Numerical Methods

  C. Agelet de Saracibar, R. Boman, P. Bussetta, J.C. Cajas, M. Cervera, M. Chiumenti, A. Coll, P. Dadvand, J. Hernández, G. Houzeaux, M.A. Pasenau de Riera, J.P. Ponthot

  in G.J. Schmitz, U. Prahl (Eds.), Handbook of Software Solutions for ICME, Chapter 7 Wiley, November 2016, 632 pages, pp. 487-532 ISBN: 978-3-527-33902-0

• Local and Global Approaches to Friction Stir Welding

  N. Dialami, M. Chiumenti, M. Cervera, C. Agelet de Saracibar

  Monograph, M157, CIMNE, Barcelona, January 2016, 93 pp. ISBN 978-84-945077-0-0

• Shaped Metal Deposition Processes

  C. Agelet de Saracibar, A. Lundbäck, M. Chiumenti, M. Cervera

  in R.B. Hetnarski (Ed.), Encyclopedia of Thermal Stresses Springer Dordrecht, Heidelberg, New York, London, 2014, pp. 4346-4355 Chapter DOI: 10.1007/978-94-007-2739-7_808 ISBN: 978-94-007-2738-0 (Print) 978-94-007-2739-7 (e-Book)

• Numerical Simulation and Visualization of Material Flow in Friction Stir Welding via Particle Tracing

  N. Dialami, M. Chiumenti, M. Cervera, C. Agelet de Saracibar, J.P. Ponthot, P. Bussetta

  in S. Idelsohn (Ed.), Numerical Simulations of Coupled Problems in Engineering, Part III, Chapter 7 Computational Methods, Vol. 33, Springer, 2014, pp. 157-169 Chapter DOI: 10.1007/978-3-319-06136-8_7 ISBN: 978-3-319-06135-1 (Print) 978-3-319-06136-8 (Online)

• On the Computational Modeling and Numerical Simulation of FSW Processes

  C. Agelet de Saracibar, M. Chiumenti, M. Cervera, N. Dialami, D. Santiago, G. Lombera

  Monograph CMFP 3, CIMNE, Barcelona, January 2012, 46 pp. ISBN 84-939640-0-9

• Thermo-Mechanical Contact in Casting Analysis

  M. Chiumenti, C. Agelet de Saracibar, M. Cervera

  in J.L. Pérez-Aparicio (Ed.), Practical Applications Using Computational Contact Mechanics TCN, Trento, 2006, pp. 107-142 ISBN: 88-95176-01-4

• Mecánica de Medios Continuos para Ingenieros

  X. Oliver, C. Agelet de Saracibar

  Ediciones UPC, Barcelona, Spain, 3ª Edición, 2005, 329 pp. ISBN 84-8301-582-X

• On the Orthogonal Sub-grid Scale Pressure Stabilization of Small and Finite Deformation J2 Plasticity

  C. Agelet de Saracibar, M. Chiumenti, M. Cervera, Q. Valverde

  Monograph CMFP 2, CIMNE, Barcelona, November 2004, 76 pp. ISBN 84-95999-62-5

• Simulación Numérica de Problemas Termomecánicos

  C. Agelet de Saracibar

  Monografía M75, CIMNE, Barcelona, Julio 2003, 178 pp. ISBN 84-95999-31-5

• A Mixed Finite Element Formulation for Incompressibility using Linear Displacement and Pressure Interpolations

  D. Christ, M. Cervera, M. Chiumenti, C. Agelet de Saracibar

  Monograph M77, CIMNE, Barcelona, July 2003, 71 pp. ISBN 84-95999-35-8

• Shear Band Localization via Local J2 Continuum Damage Mechanics

  M. Cervera, M. Chiumenti, C. Agelet de Saracibar

  Monograph M78, CIMNE, Barcelona, July 2003, 60 pp. ISBN 84-95999-36-6

• Mecánica de Medis Continus per a Enginyers

  X. Oliver, C. Agelet de Saracibar

  Ediciones UPC, Barcelona, Spain, 1ª Edición, 2003, 334 pp. ISBN 84-8301-719-9

• Elementos Estabilizados de Bajo Orden en Mecánica de Sólidos

  Q. Valverde, C. Agelet de Saracibar, M. Cervera, M. Chiumenti

  Monografía M69, CIMNE, Barcelona, Diciembre 2002, 214 pp. ISBN 84-95999-16-1

• Mecánica de Medios Continuos para Ingenieros

  X. Oliver, C. Agelet de Saracibar

  Editorial Alfaomega, Mexico, 1ª Edición, 2002, 348 pp. ISBN 970-15-0778-9

• Constitutive modeling and numerical analysis of thermomechanical phase-change systems

  M. Chiumenti, C. Agelet de Saracibar, M. Cervera

  Monograph M48, CIMNE, Barcelona, 1999, 250 pp. ISBN 84-89925-39-9

• Numerical Modeling of Sheet Metal Forming Problems

  E. Oñate, C. Agelet de Saracibar

  in P. Hartley, I. Pillinger, C.E.N. Sturgess (Eds.), Numerical Modeling of Material Deformation Processes: Research, Developments and Applications Springer-Verlag, London, 1992, pp. 318-357 ISBN: 978-1-4471-1747-6

• Modelado numérico de procesos de conformado de láminas metálicas

  C. Agelet de Saracibar, E. Oñate

  Monografía M8, CIMNE, Barcelona, 1991, 300 pp. ISBN 84-87867-07-3

Conference papers and presentations (Documents not available in Scipedia)

• Master Course on Computational Mechanics - Continuum Mechanics

  C. Agelet de Saracibar

  Master Course on Computational Mechanics, CIMNE, UPC BarcelonaTech, Barcelona, Spain, 2016

• On the numerical simulation of Additive Manufacturing processes

  M. Chiumenti, M. Cervera, N. Dialami, C. Agelet de Saracibar, W. Huang, X. Lin, L. Wei, Y. Zheng, L. Ma

  ICOMP 2016, International Conference on Computational Methods in Manufacturing Processes, Liège, Belgium, 18-20 May 2016

• A Direct Elimination Algorithm (DEA) for full stick and frictionless, quasi-static and dynamic contact problems

  C. Agelet de Saracibar, D. Di Capua

  PANACM 2015, 1st Pan-American Congress on Computational Mechanics, Buenos Aires, Argentina, 27-29 April 2015