Name: Beginning with Code_Aster
ISBN: 979-10-92674-03-3

Jean-Pierre Aubry

Computers & Technology

Beginning with Code_Aster

Free

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Description

Contents

Reviews

In the crowd of Finite Element Software, Code_Aster ranks amongst the most powerful, but unlike it’s sibling it comes under GNU GPL license.

Because it is powerful, it is complicated. As it was designed to be used by the highly knowledgeable engineers of EDF, Code_Aster user interface is spartan. And although copious the associated documentation is on the heavy side. Therefore the learning curve is quite steep at the beginning.

Beginning with Code_Aster intends to provide a step by step approach to ease the learning curve.

This book focuses on practical solutions: how to put the problem, how to solve it and how to interpret the results. It is dedicated to mechanical problems, static, linear and non linear, including contact and friction. Together with modal and buckling analysis. With beams, rods, cables, plates and 3D solid models. As far as pre and post-processing are concerned Gmsh and Salome are introduced. If this book is primarily intended for the beginner, the experienced user may find some useful hints, here or there, throughout the chapters.

Aussi au format papier. Ou faire un don.

Language

English

ISBN

979-10-92674-03-3

Preface

Introduction

Foreword

How to read

What this book is

What this book is not

What is Code_Aster

What is Gmsh

What are Salome and Salome-Meca

Typographic

Software version

Beginning with...

Preparing the geometry and mesh

Preparing the command file

Launching the calculation

Viewing the results

Drawing and meshing a simple frame

Drawing the frame with Gmsh

Meshing with Gmsh

Drawing and meshing it with Salome-Meca

Calculating it with Salome-Meca

Creating the command file

Beginning with DEBUT()

Reading and modifying the mesh

Making a finite element model from the mesh

Defining materials

Assigning materials to elements

Giving properties to elements

Setting boundary conditions

Setting loadings

Stepping for the load case

Stepping for the solution

Analysing it

Calculating results

Calculating and printing the mass of the model

Printing the reactions

Printing some key values

Printing some others results in ASCII file .resu

Printing results for graphical viewing, MED file

Ending the command file with FIN()

Preparing the command file with Eficas

Solving in Salome-Meca

Putting it together

Viewing the results with Salome-Meca

Sophisticating the display

Looking at ASCII results

Printing RESULTAT

Printing results in TABLE

Verifying the results

Spotting a mistake?

Understanding some details

Dealing with units

Understanding SIEF, SIPO, SIPM...

Orienting beam elements

Finding it out when things go wrong

Understanding the ``Overwriting'' rule

Adding end release to the top bar

Using parametric scripting in Gmsh

Modifying the .comm file

Solving

Viewing the results in the ParaVis module

Looking at ASCII results

Using an alternative option with beam elements

Making an highway sign

Creating geometry and mesh in Gmsh

Commanding for plate elements

Printing the results

Viewing the results in ParaVis

Viewing the results in Gmsh

Displaying displacement

Displaying stress in beam element

Displaying stress in plate element

Displaying stress of a named field

Displaying more...

Stiffening it with rods

Modifying in Gmsh

Enhancing the command file

Introducing ASTK for the analysis

Using STANLEY, a quick approach to post-processing

Replacing rods, by cables, first step in non-linear

Replacing rod by cables

Switching to non-linear analysis

Printing results

A variation in CREA_RESU

Cycling on a cable

Replacing the top bar by a cable

Cycling on the cable, like a clown!

Commanding for solution

Commanding for results

Creating time dependent plots

Concluding about this command file

Viewing results

Plotting results with XmGrace

Verifying some results

Working with tables

Going solid, with contact, a bi-linear spring

Introducing the study

Meshing 'part1'

Meshing 'part2'

Commanding for the solution

Reading and manipulating the meshes

Setting the boundary conditions

Gluing the two parts around the pin

Relieving rotation around the pin

Setting the contact conditions around the pin

Setting the contact conditions around the pin, with friction

Setting the vertical load

Setting for the five solutions

Running the study

Post-processing the spring

Commanding for Post-processing

Preliminaries

Creating the MED result file

Creating a plot of some results

Running the post processing

Viewing deformed shape for all cases

Numerical results

Checking the results

Looking at some plots

Introducing plastic analysis, and more...

Running an Elasto-plastic analysis

Initializing the mesh

Creating the non-linear material

Setting model and BC

Solving

Looking at the results

Replacing volumes by beams

Meshing

Commanding

Viewing results

Buckling and modal analysis

Modal analysis

Gmsh geometry and mesh

Command file, preliminaries

Command file, analysis

First results

More results

Estimating (roughly) the natural frequency

Viewing mode shapes

What to read in the documentation

Modal analysis on an pre-loaded model

Checking buckling

Buckling solving

Calculating in version 10.8

Looking at results

Buckling analysis with plates and beams, or rods

Some remarks about buckling

Pre-processing topics

Various type of beams, from Euler-Bernoulli to, multifiber....

Using MACR_CARA_POUTRE to calculate section properties

Various types of plates and shells....

Plates

Shells

Using quadratic mesh or not

Creating groups from scratch

Gathering more information before processing

Coloring mesh and model according to properties

Showing element orientation

Showing the applied load

Calculating length and area of mesh elements

Getting more from post-processing

Manipulating results with TABLE

Printing only a few parameters

Getting the maximum value of a field

Getting values within a range

Renaming field's components in a result

Adding node coordinates in a result

Printing a cleaner ASCII result file

Creating a mesh on a deformed shape

Reading (and enhancing) a result

Post-processing in version 10

Handling Code_Aster, bits and pieces

Dealing with multiple FORCE_POUTRE

Converting mesh

Launching from terminal

Multiple ASTK configurations

Alarming about 'alarme'?

Keeping informed with INFO

Living with good practice

Using Gmsh, tips and tricks

Viewing the right results

Viewing ELNO type fields

Viewing vector type fields

Viewing scalar fields on deformed shapes

Using Plugins

For creating and viewing a composite result

For animating a mode shape

Orienting Surfaces

Using the legacy Gmsh Post-pro files

Importing Nastran® and other alien files

Customizing Gmsh

Using discrete elements

Stiffness matrix

K_TR_D_L element

K_TR_L element

Mass matrix

Combining both

Drawing and meshing with Salome

First example with beams

Creating geometry and meshing

Modifying the command file

Dumping and replaying the study

Example with beams and plates

Geometry

Hints about creating groups

Meshing

View 3D with Eficas in Salome-Meca

3D Example