I listed Some Useful Links and Programs in This Regard in my blog

 http://roozbehsanaei.blogspot.com/ 

In first link

 http://homepage.usask.ca/~ijm451/finite/fe_resources/node15.html

 you can find some useful OPENSOURCE AND FREE PROGRAMS IN THIS FIELD.

Dont Hesistate to ask any question.

SALOME is a free software that provides a generic platform for Pre and Post-Processing for numerical simulation. It is based on an open and flexible architecture made of reusable components available as free software.
It is open-source (LGPL), and you can download both the sourcecode and the executables from this site.

http://www.salome-platform.org/home/presentation/overview/

Can any body tell me the best FEM software for mechanical structures. some tell me abaqus while others favor lusas. i need your advice.

ABAQUS is more popular than lusaas. then i advise you to use abaqus because

there are more  informations about it in wolrd wide web but in some civil

engineering applications lusas is better

I  am studying the FEM, but the polygons elements generation becoming the hard problem. Can anybody give me some codes for generating the Voronoi elements.

Have you looked at Qhull yet?  It is used by Matlab and Octave (open source Matlab clone) for their computational geometry functions including voronoin.  It is open source.

http://www.qhull.org

a very good code for generating delaunay triangulations and voronoi diagrams is Triangle by J. R. Shewchuk

  http://www.cs.cmu.edu/~quake/triangle.html

 a more comprehensive package for all needs in computational geometry is CGAL:

 
http://www.cgal.org

I would like to know if it is possible to import an iges file using the abaqus batch interface.

If it is possible, can someone post the command lines needed?

Thank you in advance,

Claudio 

Yes it is possible.  See the script below. Save it to a file , let's say 'igsin.py' and run it with

C:\temp>abaqus cae script=igsin.py 

#import igs script
from abaqus import *
from abaqusConstants import *
import part
import sys

#change the next lines as necessary

#path to the igs file
igsFile="C:\\temp\\mypart.igs"
#name of the model where the imported part will be added
modelName="Model-1"
#name of the imported part
partName="myImportedPartName"

if modelName in mdb.models.keys():
    myModel=mdb.models[modelName]
else:
    myModel=mdb.Model(name=modelName)

#the next two lines open and convert the igs file
#check the documentation for additional parameters to tune up the convertion

acis_file=session.openIges(igsFile)
myPart=myModel.PartFromGeometryFile(name=partName,\
                             geometryFile=acis_file,\
                             dimensionality=THREE_D,\
                             type=DEFORMABLE_BODY)

print "Part %s....imported! :-)"%myPart.name

hi any one can give some link for open sourse link- crack propagation FEM package like zencrack

thanks

i am unable to download the XFEM++ from the given link, but i am able to see the code used in the extended software . well here von mises stress yield is used for calculation of yield , can u tell me how i can use the tresca yield function for it..

thanks 

prashant sharma 

can give me internet source to free download ABAQUS V6.6 software?and how to install it?I want to do analysis in area of Stress and heat transfer analysis?

thanks for help

Bhavin Patel

hi everybody,

Can anyone explain me how to use a pre/post-processing softoware.

for exemple if i have a FEm Consol Program and i want to see the response of a structure to thermal or mechanical sollicitations.

thank you for answering  

 Generally speaking, a pre/post-processing software should have a template file which can be customized (typically, using a script language) so you tell the software what you want to be printed out in a data file, say for example, node connectivities, material properties, load and constraint data, and in general, all the information that is required by your executable or console program. The next step is to set up the pre-processing information using the pre/post-processing program. For this, you create the geometry, create the mesh, define material, apply loads and constraints, etc. Once this stage is done, you should be able to create the data file directly from the pre/post-processing software according to what you defined in the template file. At this stage, your executable or console program should read that data file to start the calculations. Your executable should also give you an output file containing relevant results to do the post-processing. Typically, the output file will contain, for example, nodal displacement and/or stresses at gauss points. This output file must be readable by the pre/post-processing software so you can visualize your results. At least, that is what GiD does. The following link might be useful for you:

http://gid.cimne.upc.es/support_team/su05.html

and look at "ProblemType tutorial".

Alejandro A. Ortiz