PHD IN MECHANICAL ENGINEERING COMPUTATIONAL SCIENCE MULTIPHYSICS COUPLINGS AND STRUCTURES INTEGRITY Dr Abderrazak TRAIDIA Nationality: French Age: 27 Status: married Driving License (French and Saudi) Mobility: Worldwide
[email protected]
Professional KAUST Cohmas Lab. Building 4, level 0 Thuwal 23955-6900 Kingdom of Saudi Arabia +966 (0) 564 642 421
Home 49 Avenue du parc des sports 94260 Fresnes France
RESEARCH My principal research interests lie in the field of modeling and implementing numerical models of multiphysics couplings in mechanics. For my PhD, I developed a three-dimensional model for arc welding to study the heat transfer and fluid flow in both the arc plasma and the molten metal. Using the finite element method, I conducted numerical simulations to quantify the effects of operating parameters on the heat transfer to the welded plates and the resulted molten metal dynamics. The French nuclear leader AREVA NP funded my research work; I was in charge of providing a support numerical tool to estimate the heat transferred to the structure during welding and the related metallurgical transformations and residual stresses after cooling. I validated my calculations with experimental tests using an Infra Red camera, High Speed camera and metallographic observations. On the foundations of my PhD and my strong skills in solid mechanics, I am currently working on the development of a unified multiphysics model to simulate Hydrogen Induced Cracking in steel pipelines in contact with sour environment (H2S). This model couples hydrogen diffusion with trapping effect, pressure build-up near in hydrogen blisters and crack extension due to the hydrogen embrittlment. This project is funded and done in close collaboration with the world’s leader oil company Saudi ARAMCO and will be used in the near future as a predictive tool to assess the criticality of hydrogen blisters in carbon steel pipelines.
EDUCATION 2008-2011
PhD (Honors) in Mechanical Engineering
(Paris) France
“Multiphysics modeling and numerical simulation of GTA welding. Application to the nuclear industry”
ECOLE POLYTECHNIQUE #1 French Institution of Higher Education and Research & Top-Tier European Universities
2006-2008 (Paris) France
M.Sc (Honors) in Mechanical Engineering “Advanced Methods for Computational Structural Mechanics”
ECOLE NORMALE SUPERIEURE The French Prestigious Institution of Higher Education and Research
2003-2006 (Paris)
B.Sc (Honors) in Mechanical Engineering
France
ECOLE NORMALE SUPERIEURE (ENS) & PARIS 6 UNIVERSITY
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“Mechanical Engineering and Technology”
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WORK EXPERIENCE KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY (KAUST)
2008-Now (Paris) France
Postdoctoral Fellow: Mechanical Engineering Department •
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Worked on a joint project between KAUST and Saudi ARAMCO for the numerical and experimental study of Hydrogen Induced Cracking in steel pipes, and studied the different mechanism behind the environmental induced degradation of materials in the oil & gas industry. Worked on the development of a virtual-testing based prediction solution for hydrogen induced crack/blister extension in steel pipes using the numerical tool Comsol Multiphysics and X-Ray tomography database. Provided a user-friendly support tool for estimating the residual integrity of steel pipes, to be used by engineers at Saudi ARAMCO
2011-Now
AREVA NP
(Jeddah) Saudi Arabia
R&D Engineer and PhD student in the Welding Technical Center •
• • • • •
Developed a numerical tool to study pulsed current GTAW process for the assembly of steam generators in EPR power plants. Studied the influence of welding parameters on both the final weld shape and the possible defects to avoid fractures. Studied the Narrow Gap GTA welding technique, both numerically and experimentally to answer to specific industrial needs, related to the safety of welded components. Conducted experiments to validate the numerical results using an Infra Red Camera, a High Speed Camera and image microscopy. Headed collaborative program with Delft University of Technology and coordinated experimental tests with ENSTA-ParisTech engineering school Promoted the Welding Technical Center abilities on numerical simulation with international conferences and journal publications (5 Peer-reviewed papers and 4 International conferences) Supervised undergraduate and graduate engineering students during the Research Internship Program
2007
EADS: INNOVATION WORKS
(Toulouse)
Research internship in the Mechanical Engineering Group
France • • •
Studied the mathematical modeling of creep and damage behavior of composite laminates under variable mechanical loading. Worked on a previously developed Fortran program for the creep behavior of composite laminates and a C++ program for the damage behavior. Implemented a module using C++ language to study the coupling between creep and damage behavior of composite laminates assemblies for the aerospace industries.
LANGUAGES French: Mother tongue - Arabic: Mother tongue - English: Fluent. Participated in international conferences in the USA, Netherlands, Italy, UAE. - Spanish: Working knowledge
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TEACHING/STUDENTS GRADUATION 2008-2011
Adjunct Assistant Professor
(Paris) France
ENSTA - Paris Institute of Technology • •
•
Taught during two years graduate courses on “Computer-Aided Design in mechanical engineering” using CATIA V5 software. Taught during three years undergraduate courses on “Multiphysics couplings in mechanics”. Practical sessions using Comsol Multiphysics© software to study various problems: numerical simulation of Electromagnetic Forming process, numerical simulation of piezoelectric effect on a bending beam, modeling residual stresses and phase transformations during welding. Supervised three undergraduate and graduate students during their internship at the department of mechanical engineering.
PUBLICATIONS Peer-Reviewed Journals •
A. Traidia, F. Roger, E. Guyot, J. Schroeder, G. Lubineau. A hybrid 2D-3D model of filler metal GTA welding. International Journal of Heat and Mass Transfer. [Accepted for publication]
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A. Traidia, and F. Roger. A computational investigation of different helium supplying methods for the improvement of GTA welding. Journal of Materials Processing Technology. 211:1563-1552, 2011.
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A. Traidia, F. Roger, A. Chidley, J. Schroeder, and T. Marlaud . Effect of helium addition on the heat transfer and fluid flow in GTA welding. Journal of Chemistry and Chemical Engineering. 5:N°9, 2011.
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A. Traidia, and F. Roger. Numerical and experimental study of arc and weld pool behaviour for pulsed GTA welding. International Journal of Heat and Mass Transfer. 54:2163-2179, 2010.
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A. Traidia, F. Roger, and E. Guyot. Optimal parameters for pulsed gas tungsten arc welding in partially and fully penetrated weld pools. International Journal of Thermal Sciences. 49:1197-1208, 2010.
International Conferences •
A. Traidia, F.Roger. Effect of helium-argon mixtures on the heat transfer and fluid flow in Gas Tungsten Arc Welding. International Conference on Fluid Mechanics, Heat Transfer and Thermodynamics, 2011. By World Academy of Science Engineering and Technology. Dubai (UAE).
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F. Roger, A.Traidia, B.Reynier. Heat transfer, fluid flow, and metallurgical transformations in arc welding: Application to 16MND5 steel. International Conference on Fluid Mechanics, Heat Transfer and Thermodynamics, 2011. By World Academy of Science Engineering and Technology. Dubai (UAE).
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A. Traidia, F.Roger, J. Schroeder. Three-dimensional modeling of the weld pool behavior during GTA welding with filler metal. European Conference Comsol Multiphysics, 2010. Paris (France).
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A. Traidia, F.Roger. A transient unified model of arc-weld pool couplings during pulsed spot GTA welding. American Conference Comsol Multiphysics, 2010. Boston (USA).
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F. Roger, A. Traidia. Modeling residual stresses in arc welding. American Conference Comsol Multiphysics, 2010. Boston (USA).
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COMPUTING SKILLS NUMERICAL SIMULATION COMSOL MULTIPHYSICS (EXPERT) MATLAB (INTERMEDIATE) CASTEM (INTERMEDIATE) ABAQUS (BEGINNER)
COMPUTER-AIDED DESIGN (CAD) CATIA V5 (GOOD KNOWLEDGE) SOLIDWORKS (INTERMEDIATE) AUTOCAD (INTERMEDIATE)
PROGRAMMING LANGUAGES C++ (GOOD KNOWLEDGE) JAVA (GOOD KNOWLEDGE) FORTRAN (INTERMEDIATE) PYTHON (BEGINNER)
REVIEWING ACTIVITY Permanent reviewer For Computational Materials Science journal COMPUTING SKILLS NUMERICAL SIMULATION COMSOL MULTIPHYSICS (EXPERT) MATLAB (INTERMEDIATE) CASTEM (INTERMEDIATE) ABAQUS (BEGINNER)
COMPUTER-AIDED DESIGN (CAD) CATIA V5 (GOOD KNOWLEDGE) SOLIDWORKS (INTERMEDIATE) AUTOCAD (INTERMEDIATE)
PROGRAMMING LANGUAGES C++ (GOOD KNOWLEDGE) JAVA (GOOD KNOWLEDGE) FORTRAN (INTERMEDIATE) PYTHON (BEGINNER)
REFERENCES Pr Ian RICHARDSON Head of the welding and Joining Group, Department of Materials Science and Engineering. Delft University of Technology, The Netherlands Email:
[email protected] Phone : +31 (0) 15 278 5086 Pr Ziad MOUMNI: Head of the Materials & Structures Group, Department of Mechanical Engineering, ENSTA ParisTech, France Email:
[email protected] Phone : + 331 69 31 97 24 Dr Frederic ROGER: Associate Professor in welding research, Department of Mechanical Engineering, ENSTA ParisTech, France Email:
[email protected] Phone : + 331 69 31 98 15 Pr Gilles LUBINEAU: Head of the COHMAS Laboratory, Department of Mechanical Engineering, King Abdullah University of Science and Technology (KAUST), Saudi Arabia Email:
[email protected]
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