Presentation of code aster and Salome-Meca · Presentation of code_aster and Salome-Meca. 2 ......

Code_Aster, Salome-Meca course materialGNU FDL licence (http://www.gnu.org/copyleft/fdl.html)

Presentation of code_aster and Salome-

Meca

2 - Code_Aster and Salome-Meca course material GNU FDL Licence

Outline

General principles of code and platform

Presentation of code_aster

General information for computation


Outline





General principles of code and platform (1/4)

code_aster is a « stand-alone » thermo-mechanical solver No integrated GUI to create geometries and meshes

No colourful post-processing

With the data settings prepared in a text file

Input: mesh and data setting

Output: physical fields (displacement, strain, stress, temperature …)

Pre-processing

(CAD, meshes)

Data setting of the

mechanical problem

Creation of finite

element model and

resolution

Post-processing

of results

u, s, e …


SALOME is a generic framework for pre- and post-processing


Salome

generic

servicesCAD Mesh

Data

setting

Math.

operations

Visuali-

zation

Supervision, GUI and SDM

code_asterVarious

physical

solversSolver X Solver Y

Job

manager

Med

format



code_aster is a thermo-mechanical solver

SALOME is a generic platform for physical simulations

Salome-Meca = SALOME + code_aster (software integration)

AdvantagesEasy installation of a complete environment (linux only)

A consistent and continuous user experience

Access from different modules to main SALOME study elements: meshes, results

Graphical selection of topological entities for data setting of code_aster

Possibility of using different pre- and post-processing tools

Importation of meshes and geometries prepared by Geometry and Mesh modules of SALOME

Importation of different input mesh formats and output result formats

Possibility for a “stand-alone” use of code_aster solver

Salome-Meca is the integration of the code_aster solver in the

SALOME platform including the AsterStudy module for

Computer Aided Engineering (CAE)



CAD module

Geometry

Mesh module

Mesh

code_aster GUI module

AsterStudyVisualization module

ParaViS


Outline






An all-purpose code for themo-mechanical study of structuresWith a wide variety of models

More than 400 finite elements: 3D, 2D, shells, beams, pipes …

More than 200 constitutive laws

A wide range of solvers: mechanical statics and dynamics, vibrations, modal and harmonic analysis,

thermo-hydro-mechanical coupled problems, thermics, metallurgy, acoustics …

A computational software used by engineers, experts and researchers

Studies: a need of a robust, reliable, tested and qualified mechanical simulation software at EDF

Researches: continuous integration of new models in the development version


code_aster for advanced simulations

Solving three types of non-linear problemsMaterial behaviour: around two hundred nonlinear constitutive laws

Kinematics: large displacements, large strains, large rotations

Contact and/or friction

Advanced features in mechanicsPorous media, fracture mechanics, fatigue, damage, metallurgy, seismic analysis,

rotating systems ...


code_aster: a wide range of behaviours

Elasticity and elasto-plasticity'ELAS‘, ELAS_HYPER‘, 'VMIS_ISOT_TRAC‘, 'VMIS_ISOT_PUIS‘, 'VMIS_ISOT_LINE‘, 'VMIS_CINE_LINE‘, 'VMIS_ECMI_TRAC‘, 'VMIS_ECMI_LINE, 'VMIS_CIN1_CHAB‘,

'VMIS_CIN2_CHAB‘, 'VMIS_CIN2_MEMO‘, 'DIS_CHOC‘, 'VMIS_POU_LINE‘, 'VMIS_POU_FLEJOU‘, 'ARME‘, 'ASSE_CORN‘, 'DIS_GOUJ2E_PLAS‘, 'DIS_GOUJ2E_ELAS‘,

'VMIS_ASYM_LINE‘, 'DIS_ECRO_CINE ‘, 'DIS_BILI_ELAS‘

Elasto-viscoplasticity'VISC_ISOT_LINE‘, 'VISC_ISOT_TRAC‘, 'LEMAITRE‘, 'DIS_VISC‘, 'VISC_CIN1_CHAB‘, 'VISC_CIN2_CHAB‘, 'VISC_CIN2_MEMO‘, 'VISCOCHAB‘ , 'NORTON_HOFF‘,

'VISC_TAHERI‘, 'MONOCRISTAL‘, 'POLYCRISTAL‘

Materials for nuclear fuel and metals under irradiation'VISC_IRRA_LOG‘, 'GRAN_IRRA_LOG‘, 'GATT_MONERIE‘, 'LEMAITRE_IRRA‘, 'LMARC_IRRA‘, 'LEMA_SEUIL‘, 'IRRAD3M‘, 'DIS_GRICRA‘

Models with mechanical effects of metallurgical transformations

Fracture mechanics and damage models'ENDO_FRAGILE‘, 'ROUSSELIER', 'ROUSS_PR', 'ROUSS_VISC‘, 'VENDOCHAB‘, 'VISC_ENDO_LEMA‘, 'CZM_EXP_REG‘, 'CZM_LIN_REG‘, 'CZM_EXP‘, 'CZM_OUV_MIX' ,

'CZM_TAC_MIX‘, 'CZM_TRA_MIX' , 'CZM_FAT_MIX‘, 'RUPT_FRAG‘, 'JOINT_MECA_RUPT‘, 'JOINT_MECA_FROT‘,'ENDO_HETEROGENE‘

Concrete, reinforced concrete, civil engineering models'ENDO_ISOT_BETON‘, 'ENDO_SCALAIRE‘,'ENDO_CARRE' , 'ENDO_ORTH_BETON‘, 'MAZARS‘, 'BETON_DOUBLE_DP‘, 'LABORD_1D‘, 'GRILLE_ISOT_LINE‘,

'GRILLE_CINE_LINE‘, 'GRILLE_PINTO_MEN‘, 'PINTO_MENEGOTTO‘, 'GLRC_DAMAGE‘, 'GLRC_DM' , 'CORR_ACIER' , 'BETON_REGLE_PR‘, 'JOINT_BA' , 'GRANGER_FP‘,

'GRANGER_FP_V‘, 'GRANGER_FP_INDT' , 'BETON_UMLV_FP‘, 'BETON_RAG'

Geomaterials'ELAS_GONF ‘, 'CJS ' , 'LAIGLE ‘, 'LETK ‘, 'HOEK_BROWN' , 'HOEK_BROWN_EFF‘, ‘HOEK_BROWN_TOT ’ , 'CAM_CLAY ‘, 'BARCELONE ’ , 'DRUCK_PRAGER' ,

'DRUCK_PRAG_N_A' , 'VISC_DRUC_PRAG, 'HUJEUX ‘, 'JOINT_BANDIS '

Multi-physics: thermo-hydro-mechanical, concrete, metallurgy

User materials : UMAT, MFront, Aster


code_aster: a wide range of finite elements

Continuum mechanics3D

Linear, quadratic, reduced or full integration

2D

plane strain, plane stress, axi-symmetry

Integration of non-linear behaviour in plane stress

Structural elements2D elements : shells, plates

1D elements : beams, bars, cables, pipes

Discrete elements : masses, springs, dashpots

Connections and assembliesLinear relationships between degrees of freedom, transmission of torque

Discontinuous media (cracks and joints)XFEM level-sets

Joint elements and CZM (Cohesive Zone Model)


code_aster: algorithms and analysis methods

Mechanical solversLinear or non-linear statics : MECA_STATIQUE, STAT_NON_LINE

Dynamics on physical basis : DYNA_VIBRA, DYNA_NON_LINE

Modal analysis : CALC_MODES

Dynamic on modal basis : DYNA_VIBRA

Other physicsThermics : THER_LINEAIRE, THER_NON_LINE

Acoustics : PHENOMENE=‘ACOUSTIQUE’

Metallurgy (for welding applications)

FSI : fluid-structure interaction

Thermo-hydro-mechanical coupling (porous media modelling)

Tools for resolutionSubstructuring, control of the nonlinear algorithms

Several algebraic solvers, sequential or parallel, direct or iterative

Post-processing tools : CALC_CHAMP, POST_CHAMP, …


Outline





Stages of a study

Step Salome-Meca code_aster standalone

Geometry definition SALOME (Geometry) CAD modeller

Mesh generation SALOME (Mesh) Mesh tool

Data settings

SALOME (AsterStudy)

Text editor

Computation launching

and survey

Result analysis SALOME (ParaViS) Visualization application,

spreadsheet …

code_aster

solving

MED mesh MED result


AsterStudy integrated GUI for code_aster in

SALOME Platform (1/2)

Case management:

Data settings:

Graphical data setting with strong mesh

interaction

Text mode with custom embedded text

editor for high level command file edition

(python loops, code_aster data structure

introspection …)

Data files:

Automatic input and output files

management in graphical mode

Custom management by user in advanced

text mode


AsterStudy Integrated GUI for code_aster in

SALOME Platform (2/2)

Case computation:

Launch computation:

Choose which stages of a

study case to launch

Set properties for a run

(code_aster version, memory

allocation, cluster or localhost

execution)

Survey and management of running case:

Interactive follow up of computation

Graphical display of relation between running cases

Access to output and message file from a run case

Case View tab overview :


Data Settings management

Data Files management

Main commands

sort in categories

Stage management

Stages 1 and 2: stages are used to

divide a case, here thermal analysis and

then mechanical analysis

Show all commands

available


Data settings:

Graphical command editionAdd

commentary

Show only filled

keyword

Information on

keyword

Go to

documentation

Rules

representation

Mandatory keyword

Switch

Aster/Skill-

oriented

language


Graphical command edition

Factor keyword

summary and

edition button

Search tool

for keyword Depth of edition

Unfold the list of

factor keyword

occurrences

Add factor

keyword

occurence


Graphical mesh interaction

Add mesh from a

file

Available meshes

from Mesh module

Group selection

synchronized with

group visualization

Group selection

widget, with automatic

group detection


Graphical Python variables definition

Add simple Python variable

All Python variables are stored at

the beginning of each stage

Python variable edition panel


Case View:

Advanced text mode command file editionSwitch to text mode for advanced

command file edition

Custom embedded editor (command completion, syntax

coloring…)


Data setting and command language (1/3)

Command file is ALSO a python

scriptHowever, we should only focus on the

code_aster commands

Command file composes of a

sequence of code_aster specific

commandsEach specific command composes of keywords

and defines, assigns or uses data as input

Most of the commands produce

"concepts"On the left side of the equal sign ( = )

The concepts generated by one command can

be used as an input to the following command

Command file contains no geometry

description


An example of a command

STEEL = DEFI_MATERIAU (ELAS = _F ( E=205000.E6, NU=0.3 ) )

An other example IMPR_RESU( RESU = _F ( RESULTAT = RESU ) )


Name of the concept

User choiceCommand Factor

keyword

Simple keyword Argument

of the simple keyword

No concept

is produced

Command Factor

keywordSimple keyword Argument

of the simple keyword


« reuse » keyword is used to extend an existing conceptMESH = LIRE_MAILLAGE ( FORMAT = ‘MED’ )

MESH = DEFI_GROUP ( reuse = MESH,

MAILLAGE = MESH,

CREA_GROUP_NO = _F (GROUP_MA = ‘upper’ ))

Since commands are sequential, a concept must be created before being used


Reuse of the MA concept

defined by LIRE_MAILLAGE Indicator of a factor keyword

MESH = LIRE_MAILLAGE()

STEEL = DEFI_MATERIAU(ELAS = _F( E = 205000.0E6,

NU = 0.3, ),)

CHMAT = AFFE_MATERIAU(MAILLAGE=MESH,

AFFE =_F(TOUT='OUI',

MATER=STEEL,),)


Data Settings: code_aster input and output files

Input files:

Command file

Meshes:

Aster (.mail)

Med (.med)

Gibi (.mgib)

Ideas (.unv)

GMSH (.msh)

Bases (folder):

Aster base or HDF

Various data in text format

Output files:

Aster Message file

Aster Result file

Output format:

Med (.med)

Ideas (.unv)

GMSH (.msh)

others …

Bases (folder):

Aster base or HDF

Various results in text

format


Data files: Graphical mode

Directly add files in

command edition panel

File summary for stage forma01a

Command related with the file

forma01a.mmed


Data files: Advanced Text Mode

2

Manage file manually

Pay attention to the

correspondance between data

files and command files for

logical units


History view tab overview:

Switch to History View

Case management:

Create and import case

Current case

(needs to be

selected for

edition and

launch to be

possible)

List of

previous run

cases

Selection of

stages to be run

Automatically refreshed output

of the calculation for the currently

selected case


Selection of the stages to be run

Stage 1 will be run ( ) and may be used to

restart a computation (« Reusable »)

Neither stage 2 nor stage 3 will be run ( )

Stage 1 won’t be executed, only its results

will be reused ( )

Stage 2 will be executed and may be reused

afterwards

Stage 3 won’t be run

Stage 1 won’t be executed, only its results

will be reused

Stage 2 and 3 will be executed jointly and

the results of stage 3 will be reusable


Launching of calculations

Free field to

describe the

case to be run

Standard

parameters

Server on which the

calculation is runParallel calculations

settings

Location of

outputs and logs

for each run case


Representation of previously run cases

1st run case

2nd run case

3rd run case


Follow-up of calculations

Hyperlinks to easily browse

through the ASCII output of

the calculation by stage

To search

the output

Tool tip with the metadata

of a previously run case

including the free

comment field


ASTK standalone GUI for computation launching

(1/4)

GUI Management Study

Files of

current

study

Run settingsFile settings ; unit, data file, result file, compression,



(2/4)

Command file

Mesh fileHere in MED format

“base”Folder containing files (compressed or not) allowing the recovery of the calculation

Message fileVerbatim report of the computation, information, alarms and errors

Result fileText file containing the prints in this format

File containing calculated fieldsHere in MED format

Each file has an associated "type"



(3/4)

Each type of file has a "logical unit"

assigned by default. The value can be

changed with caution.

Each file can be input (data),

output (result), or both (case of the

base)

Input file

Output file

Compressed file



(4/4)

File forma01a.commDEBUT()

MESH1 = LIRE_MAILLAGE( UNITE = 20 )

MESH2 = LIRE_MAILLAGE( FORMAT = 'MED',

UNITE = 21 )

FIN()

In case of multiple files of the same type (mesh, command file,

results), attention to conflicts of "logical units"


End of presentation

Is something missing or unclear in this document?

Or feeling happy to have read such a clear tutorial?

Please, we welcome any feedbacks about Code_Aster training materials.

Do not hesitate to share with us your comments on the Code_Aster forum

dedicated thread.

http://www.code-aster.org/forum2/viewtopic.php?id=17343

Date post:	29-Apr-2018
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Presentation of code aster and Salome-Meca · Presentation of code_aster and Salome-Meca. 2 ......

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