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