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  1. bfillery

    how to find nodes connected to a specific node

    thepiggy I am guessing by the database you mean a file.cae. If this is the case then you still need to use a cae license but not run cae with a GUI To do this you can call the script in the working directory as follows abaqus cae noGUI=script_name.py You will also need some stuff at the top...
  2. bfillery

    how to find nodes connected to a specific node

    Hi, Sorry, I think I wrote the wrong thing. If accessing the odb from within CAE one way is to use, myOdb=session.openOdb(name='myOdb', path='C:/......') then myOdb.rootAssembly.instances[instanceName].sets[elementSetName].elements etc as discussed above.
  3. bfillery

    how to find nodes connected to a specific node

    Hi Lets say that you have an element set defined in the assembly that contains all the elements that are associated with the node set you mentioned above. To access the connectivity for each of the elements in this element set you would loop over the elements as follows for i in...
  4. bfillery

    how to find nodes connected to a specific node

    thepiggy I guess you could loop though all of the elements that are associated with the nodeset to work out if the target node resides in the connectivity list for a particular element. If so, you could then work out what other nodes are connected to that target node based upon its position in...
  5. bfillery

    Assigning different material to the same part in different steps

    Hi madhavi27, I dont think it is possible to assign different material properties to the same part in different steps. For certain material properties a work around is to have a temperature dependent material property defined and change the temperature of the part in the different steps. The...
  6. bfillery

    MODELLING A CIRCULAR/ELLIPTICAL FRONT AXIAL CRACK IN A PIPE WALL

    Hi mechsid There are no special purpose programs for this transformation that i know of. You will have to write your own python code to do this. There are a few commercial programs that do generalised crack tip meshing such as Zencrack. bfillery
  7. bfillery

    MODELLING A CIRCULAR/ELLIPTICAL FRONT AXIAL CRACK IN A PIPE WALL

    Hi mechsid The best way I have found to do this is to 1st create a mesh part of the cracked plate and then write a python script to transform the node locations in the plate to those of the required cylindrical geometry. bfillery
  8. bfillery

    NFORC for defining total forces across section

    Hi all, My first question is in regards to NFORC. My basic understanding is that NFORC calculates the nodal forces within an element that can be attributed to the stresses within that element. If I have a surface that defines a section through a 3D body, can I sum these NFORC for all elements...
  9. bfillery

    Still trying to model a crack inside the geometry: fancy crack shape?

    eispiata I have done this before. You need to apply contact to the opposing seam surfaces. Although the documentation seams suggests this is not possible it is, and it works. There is one difficulty. If you are using the fracture mechanic capabilities and therefore define a crack tip...
  10. bfillery

    Still trying to model a crack inside the geometry: fancy crack shape?

    eispiata You could try to define a seam (Intereaction-Special-Crack ???). I know this functionality is avaiale in 6-7. In this case the mesher creates duplicate nodes along the seam such that the surfaces along the seam can seperate. In this way the rest of the model can be simply connected as...
  11. bfillery

    Using Excel for NREAD

    Hi all, I was wondering if anybody knows how to use excel to generate a file that can be used as avnode file for NREAD in Ansys V11. All formats I have tried (.csv etc) either fail or do not read the data correctly. bfillery
  12. bfillery

    Determining effective force and moment through solid section

    Thanks corus I have discovered that a cross section can be defined in ABAQUS using *SECTION PRINT. The effective forces and moments across this section can then be output but not in an .odb, just in the .fil or .dat. A work around is to define a sub-model with a submodel boundary at the...
  13. bfillery

    Determining effective force and moment through solid section

    Dear corus and brep Thanks for your replies. Corus, in response to your reply, I have a further couple of questions. Firstly, when calculating the axial force I understand that it is the average of the axial stress times the area, but when working in regards to a finite element simulation...
  14. bfillery

    Determining effective force and moment through solid section

    Hi all, I was wondering if anybody had any idea how to determine the effective axial force and bending moment that results from a solid cross sections stress distribtution. That is, say I have a cross section through either a p.strain p.stress or 3D simulation, and I would like to resolve the...
  15. bfillery

    Writing the inp file?

    Dear rmettier I believe the correct script in your case should be: mdb.jobs['Job-1'].writeInput() I hope this helps bfillery
  16. bfillery

    How does biasing work?

    baudencm If the bias ratio is B, and the number of elements is N, then the length ratio of element i+1 to element i = l_{i+1}/l_{i} = C = B^(1/N-1). The element sizes, and therefore nodal spacing can be calculated from here. bfillery
  17. bfillery

    How does biasing work?

    baudencm I believe the each element size is a some constant product of the last. To work out the actual alogrithm, I suggest you do a simple biased mesh on a square, query the node locations in the direction corresponding to the bias and plot the results. This will give you a good idea if each...
  18. bfillery

    J Integral Independence 3D Mesh

    Thanks xerf The J Integral works fine for me in 3D (including under thermal stress/strain -> body force) in all cases but at a free surface intersection at the moment, where in this case the users manual it stipulates that for increased path independence, nodal normals defining the free surface...
  19. bfillery

    J Integral Independence 3D Mesh

    Hi All, Was wondering if anybody who is experienced with the J Integral (Fracture mechanics) option can answer the following. When performing a J-Integral analysis in a 3D cylinder, I find the J Integral values at the intersection of the crack line with a free body surface is path dependent...
  20. bfillery

    How to determine line directions in CAE

    Hi All Just wondering if anybody knows how to either view or determine line directions in Abaqus CAE. I need to check the direction of a crack face tangent when basing the crack line on a line within the assembly. Thanks bfillery

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