Structural mechanics simulation at Electricité de France Needs and consequences on software policy

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Alberta McDonald
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1 Structural mechanics simulation at Electricité de France Needs and consequences on software policy Christophe DURAND, Code_Aster project manager, EDF R&D

2 Outline Engineering challenges induce simulation challenges A typical study as a guiding thread Software policy for researches and studies

3 Challenge : operating decades lifetime systems

4 ... Wich implies simulation challenges Physics and numerics for complex phenomenons knowledge HPC for bigger and more accurate models performance High level supervision for multi-disciplinary, optimization, sensitivity, stochastics confidence in results PLM and qualification confidence in process

5 A typical study A big, complex, multi-scale and sollicited structure

6 A typical study Cracks on screw-heads : Why? When? How long will it last? with very local, hard to simulate pathologies

7 A typical study Neutronics Constitutive law load Thermic / fluids Mechanics behaviour load

8 A typical study : numerous and multi-scale results 30 mm Tresca strain in the 1088 screws fillets 8 meters

9 A typical study : numerous and multi-scale results Physics and numerics HPC ability to code and qualify a specific constitutive law ( IRRAD3M, elastoplasticity with creep and swelling induced by irradiation) contact nodes : «frontier» study which leads to direct improvements in the code algorithms 26 M tetraedrons for solid thermics / 7 M dof for mechanics. 75 days of cpu (11 days elapse thanks to //ism) High level supervision Need of «open» codes Need of HPC codes Multi-disciplinarity : importance of standardization, inter-operability Use of best-in-class tools for each physic (and associated competences ) Need of a platform as a company standard

10 EDF s choice for software policy In-house development for : programming and capitalizing innovative researches, dedicated numerical models continuous process for qualification and quick transfer from upstream researches to engineering studies complete mastering (tools and competences) : sharing expertise with reactivity, validation and verification in a nuclear context, quality assurance

11 50 years of struct. mechanics simulation

12 20 years of Code_Aster s dvpt An all-purpose FEA software for structural mechanics : Plugged in a user-friendly inter-operable environment : Salome_Meca

13 20 years of Code_Aster s dvpt 60 releases each year documents freely available ( pages) 15 PHD for the 8 last years 250 new features in the code in tests runned for each release CODE_ASTER as a GPL free software since 2001 : downloads, more than hits each week

14 Free software diffusion : intents Recognition by the use > downloads, living community structured by the forum : industry, research, teaching. Multiplication of uses by number and variety. Qualification Benchmarks about performances and abilities. Feedbacks in a bugtracker. Contributions Modular architecture making constitutive laws and finite elements easy to code and plug Spreading of competences Academic and industrial partners, providers, students and PhD

15 Free software diffusion : intents But most of all : An open-source base for cooperations Developments at shared costs. Easier capitalization for Phd works and researches. Software base for industrial and scientific partnerships

Thank you for your attention For more information and download : www.

16 Thank you for your attention For more information and download : french award : best open-source project for industry

Code_Aster / Salomé_Méca 1. Short overview 2. How we make it 3. Focuses on capabilities 4. Goals and stakes 5. How to get it

1 Code_Aster / Salomé_Méca 1. Short overview 2. How we make it 3. Focuses on capabilities 4. Goals and stakes 5. How to get it 2 1 Short overview An all-purpose FEM simulation software for structural analysis