1 novembre 2007 Code_Aster / Salom_Mca 1. Short overview 2. How - - PowerPoint PPT Presentation

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

Code_Aster / Salomé_Méca

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1 Short overview

An all-purpose FEM simulation software for structural analysis : Plugged in a user-friendly environment : Salome_Meca

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1 Short overview of Code_Aster

A large scope of capabilities

• Thermal and mechanical
• Statics and dynamics, linear or not
• Modal analysis, harmonic and random response
• ≈ 400 finite elements : 3D, 2D, shells, beams, pipes …
• Wide range of loadings
• Interaction with other physics (coupled or not) :

fluid, soil structure computation, electro-magnetism …

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1 Short overview of Code_Aster

Non linearities and specific models

• Contact, friction
• Large displacements, large deformations
• Behaviour models (≈ 100 constitutive laws)
• Porous media, fracture mechanics, damage,

fatigue, welding, seismic analysis …

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1 Short overview

A solver plugged in Salome environment

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1 Short overview

A solver plugged in Salome environment

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2 Why we make it

Specific requirements of nuclear industry

• Regulatory design, safety

Specific problems : ageing of structures, re-evaluation of margins

• Stakes differ from manufacturing industry and software vendors.

Research and developments

• Capitalization of know-how and models, quick transfer to engineering
• Mastering of source code, models …

Choice of in-house development

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2 How we make it (some figures) 60 releases each year 200 in-house users 1.256 documents freely available (13.800 pages) 15 PHD for the 8 last years 250 new features in the code in 2007 2.000 tests runned for each release 200.000 CPU hours 4 training sessions, 40 listeners each

ASTER as a free software : 30.000 downloads, 10. 000 hits a week

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2 How we make it

200 400 600 800 1000 1200 1400 1600 1800 2000 07/89 07/90 07/91 07/92 07/93 07/94 07/95 07/96 07/97 07/98 07/99 07/00 07/01 07/02 07/03 07/04 07/05 07/06

source lines x 1.000 nb tests nb doc pages x 10 nb in-house users CPU hours x100

Version 4

• avr. 98

Version 6

• nov. 2002

Version 2

• ct. 93

Version 5

• ct. 2000

Version 3 juin 96 mise en libre Version 7 déc. 2004 Version 8 déc. 2006

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2 How we make it

A network of programmers (like a free software)

• A core team in charge of : kernel development, integration,

distribution … [~20 engineers.year]

• Applicative projects : bring new models / developements [~40

engineers.year]

• Continuous process : no V cycle, no predefined specifications
• A life cycle of 2 years : the developped version is transfered to

engineering after a qualification process

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deplacement du point central (face superieure) force (P*S) en kN EDF

Dé partement Mé canique et Modè les Numé riques COURBE FORCE / DEPLACEMENT

50 100 150 200 250 300 5 10 15 20 25 30x10- 4

3 Focuses on capabilities (1/5)

Structure finite elements Contact-friction Large deformations/rotations Driving forces and displacements …

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3 Focuses on capabilities (2/5)

Damage Fracture Fatigue…

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VAL ISO >-5.63E+02 < 9.61E+02

• 5.51E+02
• 4.79E+02
• 4.08E+02
• 3.36E+02
• 2.65E+02
• 1.94E+02
• 1.22E+02
• 51.

21. 92. 1.63E+02 2.35E+02 3.06E+02 3.78E+02 4.49E+02 5.20E+02 5.92E+02 6.63E+02 7.35E+02 8.06E+02 8.77E+02 9.49E+02 AMPLITUDE DEFORMEE 5.00E+03

3 Focuses on capabilities (3/5)

Dynamics Acoustics Fluid forces SFSI, SSI…

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3 Focuses on capabilities (4/5)

Porous media and geomaterials Civil engineering Concrete…

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3 Focuses on capabilities (5/5)

Multi-scale Multi-physics Coupling and chaining …

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3 Focuses on capabilities : samples

• 3D simulation of excavation, damage, re-saturation and Darcy

flow in a waste storage repository,

• Deformations of a complete core during several irradiation

cycles,

• Extension and stop of a crack in a pressure vessel after a

thermohydraulic transient,

• Computation of the leak flow in the containment,
• 3D crack propagation in a rotor,
• Simulation of a complete shaftline …

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4 Goals and stakes

High performance computing

• Increasing size of models
• Super-computer trends

Partnership policy

• Free software consortium
• Research partnerships

Interoperability

• Easy coupling with other physics in Salomé environment

Management

• Simulation process : user-friendly, quality and reliability
• While Code_aster remains the place in which we capitalize

researches

http://www.code-aster.org

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5 How to get Code_Aster stand alone ?

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5 How to get Code_Aster stand alone ?

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5 How to get Salome_Meca ?

We are not in charge of the « free » distribution … but we can give it to partners or to whoever wants to distribute it. For instance : www.caelinux.com

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Thanks