Research

RESEARCH LINES

Subgrid Scale FE Stabilization Methods in Solid Mechanics

SUMMARY
Subgrid scale FE stabilization methods for incompressibility using a mixed P1/P1 displacement/pressure formulation in solid mechanics (infinitesimal strain elasticity, infinitesimal strain J2 plasticity, infinitesimal strain J2 damage models, finite strain elasticity and finite strain J2 plasticity) have been developed and implemented. Subgrid scale FE stabilization for incompressibility and convection dominant coupled thermomechanical problems using a mixed P1/P1/P1 velocity/pressure/temperature formulation in solid mechanics (using thermo-rigid-viscoplastic Norton-Hoff and Sheppard-Wright material models) have been developed and implemented.

SELECTED PUBLICATIONS
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: 1 Februray 2014 | doi: 10.1007/s11831-014-9094-z

C. Agelet de Saracibar, M. Chiumenti, Q. Valverde, M. Cervera 
Volume 195, Issues 9-12, 1 February 2006, Pages 1224-1251
First published on-line: 15 June 2005 | doi: 10.1016/j.cma.2005.04.007

M. Chiumenti, Q. Valverde, C. Agelet de Saracibar, M. Cervera 
Volume 20, Issues 8-9, August-September 2004, Pages 1487-1504
First published on-line: 19 December 2003 | doi: 10.1016/j.ijplas.2003.11.009

M. Cervera, M. Chiumenti, C. Agelet de Saracibar 
Volume 28, Issue 5, 25 April 2004, Pages 373-393
First published on-line: 14 April 2004 | doi: 10.1002/nag.341

M. Cervera, M. Chiumenti, C. Agelet de Saracibar 
Volume 193, Issues 9-11, 5 March 2004, Pages 849-880
First published on-line: 28 January 2004 | doi: 10.1016/j.cma.2003.11.009

M. Cervera, M. Chiumenti, Q. Valverde, C. Agelet de Saracibar 
Volume 192, Issues 49-50, 5 December 2003, Pages 5249-5263
First published on-line: 8 October 2003 | doi: 10.1016/j.cma.2003.07.007

M. Chiumenti, Q. Valverde, C. Agelet de Saracibar, M. Cervera 
Volume 191, Issue 46, 8 November 2002, Pages 5253-5264
First published on-line: 22 October 2002 | doi: 10.1016/S0045-7825(02)00443-7


Computational Modeling and Numerical Simulation of Coupled Thermomechanical Problems. Application to the Numerical Simulation of Casting, Friction Stir Welding (FSW), Electron Beam Welding (EBW) and Additive Manufacturing (AM) Processes

SUMMARY
Computational models fo coupled thermomechanical problems have been developed, implemented and applied to the numerical simulation of material forming processes, such as casting (gravity die casting, low pressure die casting, high pressure die casting, lost foam casting), laser forming, Additive Manufacturing (AM) processes, such as Blown Powder Fusion (BPF) and Shaped Metal Deposition (SMD), and welding processes, such as arc welding, Friction Stir Welding (FSW) processes. Thermomechanical constitutive laws and thermomechanical frictional contact models have been developed and implemented. Lagrangian, Eulerian and Arbitrary Lagrangian-Eulerian formulations have been considered. An apropos kinematic framework for the computational modeling of friction stir welding (FSW) processes has been proposed, developed and implemented. Subgrid scale FE stabilization methods for incompressibility and convection dominant problems have been developed and implemented.

SELECTED PUBLICATIONS ON NUMERICAL SIMULATION OF CASTING PROCESSES
C. Agelet de Saracibar, M. Cervera, M. Chiumenti
Special Issue on Computational Modeling of Forming Processes
Volume 17, Issue 12, December 2001, Pages 1565-1622
First published on-line: 16 October 2001 | doi: 10.1016/S0749-6419(00)00094-2

M. Cervera, C. Agelet de Saracibar, M. Chiumenti 
Volume 46, Issue 9, 30 November 1999, Pages 1575-1591
First published on-line: 19 October 1999 | doi: 10.1002/(SICI)1097-0207(19991130)46:9<1575::AID-NME713>3.0.CO;2-D

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 | doi: 10.1016/S0749-6419(98)00055-2

SELECTED PUBLICATIONS ON NUMERICAL SIMULATION OF FSW PROCESSES
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

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

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

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
First published on-line: 19 January 2016 | doi: 10.1007/s11831-015-9163-y

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

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: 1 Februray 2014 | doi: 10.1007/s11831-014-9094-z

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

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 | doi: 10.1016/j.compstruc.2012.12.006

M. Chiumenti, M. Cervera, C. Agelet de Saracibar, N. Dialami 
Volume 254, February 2013, Pages 353-369
First published on-line: 10 October 2012 | doi: 10.1016/j.cma.2012.09.013

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

SELECTED PUBLICATIONS ON NUMERICAL SIMULATION OF EBW PROCESSES
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
Available on-line: 20 September 2016 | doi: 10.1016/j.finel.2016.07.003

SELECTED PUBLICATIONS ON NUMERICAL SIMULATION OF AM PROCESSES
Prediction of residual stresses and distortions induced by the Additive Manufacturing process
M. Chiumenti, M. Cervera, C. Agelet de Saracibar, N. Dialami, W. Huang, X. Lin, L. Ma, L. Wei
WCCM 2016, 12th World Congress on Computational Mechanics, Seoul, Korea, 24-29 July 2016
APCOM 2016, 6th Asia-Pacific Congress on Computational Mechanics, Seoul, Korea, 24-29 July 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, 2nd International Conference on Computational Methods in Manufacturing Processes, Liège, Belgium, 18-20 May 2016

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 
Volume 199, Issues 37-40, 1 August 2010, Pages 2343-2359
First published on-line: 14 April 2010 | doi: 10.1016/j.cma.2010.02.018


Computational Modeling and Numerical Simulation of Frictional Contact Problems

SUMMARY
Penalty and Augmented Lagrangian methods for frictional contact problems have been implemented. An original frictional time integration algorithm, suitable for large slips within a finite strain framework, has been developed and implemented. Suitable thermomechanical frictional contact models have been developed and implemented. A direct elimination algorithm for full stick and frictionless contact problem has been developed.

SELECTED PUBLICATIONS
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 | doi: 10.1016/j.finel.2014.09.001

M. Chiumenti, C. Agelet de Saracibar, M. Cervera 
Volume 130, Issue 6, 23 April 2008, Art. No. 061301.1-10
First published on-line: 23 April 2008 | doi: 10.1115/1.2897923

Thermo-Mechanical Contact in Casting Analysis
M. Chiumenti, C. Agelet de Saracibar, M. Cervera
in Practical Applications Using Computational Contact Mechanics
J.L. Pérez-Aparicio (Ed.)
TCN, Trento, 2006, pp. 107-142

C. Agelet de Saracibar, M. Chiumenti 
Volume 177, Issues 3-4, 20 July 1999, Pages 401-426
First published on-line: 30 May 2000 | doi: 10.1016/S0045-7825(98)00390-9

C. Agelet de Saracibar 
Archives of Computational Methods in Engineering 
Volume 5, Issue 3, September 1998, Pages 243-301

C. Agelet de Saracibar 
Volume 142, Issues 3-4, 30 March 1997, Pages 303-334
First published on-line: 6 May 1999 | doi: 10.1016/S0045-7825(96)01133-4


Computational Modeling and Numerical Simulation of Sheet Metal Forming Processes

SUMMARY
Computational modeling and numerical simulation of sheet metal forming processes, such as stretching, deep drawing, or superplastic forming, using a rigid plastic/viscoplastic flow formulation. The Gurson model has been considered and nucleation, growth and coalescence of voids have been taken into account. A selective viscous bending/membrane formulation was developed. Different frictional contact models were implemented. The computational models developed were implemented into the FE codes MFP2D/MFP3D.

SELECTED PUBLICATIONS
Numerical Modeling of Sheet Metal Forming Problems
E. Oñate, C. Agelet de Saracibar
in Numerical Modeling of Material Deformation Processes: Research, Developments and Applications
P. Hartley, I. Pillinger, C.E.N. Sturgess (Eds.)
Springer-Verlag, London, 1992, pp. 318-357

Modelado numérico de procesos de conformado de láminas metálicas
C. Agelet de Saracibar, E. Oñate
Monografía M8, CIMNE, 1991, 300 pp.
ISBN 84-87867-07-3

E. Oñate, C. Agelet de Saracibar 
Volume 30, Issue 8, December 1990, Pages 1577-1593
First published on-line: 24 June 2005 | doi: 10.1002/nme.1620300815

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 

E. Oñate, M. Kleiber, C. Agelet de Saracibar 
Volume 25, Issue 1, January 1988, Pages 227-251
First published on-line: 23 June 2005 | doi: 10.1002/nme.1620250118


RESEARCH STAYS

- Centre of Excellence for Advanced Materials and Structures, IPPT PAN, Warsaw, Poland, 15-30 July 2001
- Division of Applied Mechanics, Stanford University, Palo Alto, CA, USA, 1 February 1993-31 January 1994
- Cray Research Center, Structural Applications Group, Cray Research Inc., Eagan, MN, USA, 1 October-20 December 1990


DOCTORAL STUDENTS

Current students

Mohammad Hassan Faghihi (2017)
TBD

Past students

Q.M. Valverde (2002)
Elementos estabilizados de bajo orden en mecánica de sólidos
Co-advisored with M. Cervera
UPC BarcelonaTech

M. Chiumenti (1999)
Constitutive modeling and numerical analysis of thermo-mechanical phase-change systems
UPC BarcelonaTech


MASTER STUDENTS

Current students

n/a

Past students

Anshuman Singh Bhadauria (2016)
Multiscale Materials Modelling using DFT-based Localization Relationships
Master Erasmus Mundus on Computational Mechanics
UPC BarcelonaTech

Iñaki Irizar (2004)
Estudio de problemas de contacto. Aplicación al cálculo de anclajes de hormigón
Master en Métodos Numéricos para Cálculo y Diseño en Ingeniería
UPC BarcelonaTech

Quino Valverde (1995)
Desarrollo del elemento B-bar cuadrilátero bi-lineal de deformación plana en el marco de una formulación variacional mixta
Master en Métodos Numéricos para Cálculo y Diseño en Ingeniería
UPC BarcelonaTech


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