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  1. nastranuser123

    Contact in SOL 101

    Can anyone please help/advise? I look forward to your replies
  2. nastranuser123

    Contact analysis- a general question

    Hi, I have asked this question Siemens UG NX community as well. But, since this question is a general question related to contact analysis, I thought of asking in thsi community as well. My mesh is of master and slave contact edges is not a confirmal mesh (i.e. the nodes of master and slave...
  3. nastranuser123

    Contact in SOL 101

    I'm running a contact analysis in SOL 101. My mesh of master and slave contact edges is not a confirmal mesh (i.e. the nodes of master and slave edges / region do not coincide. In that case, is it a good practice to define two contact pairs ? That is : one pair slecting region 1 as source and...
  4. nastranuser123

    NX /DMAP/SOLution 106

    Further to the above,I'd like to add: As I understand, It is possible to launch an external application from a Nastran solution using the ISHELL capability. ISHELL is a DMAP command that will invoke the external program. That program can be written in any language and is compiled separately...
  5. nastranuser123

    NX /DMAP/SOLution 106

    I intend modifying the SOlution 106 of NX NASTRAN as I have written some external sub routines for contact and friction analysis. I need to be able to write out the stiffness matrix, residuals and displacements at some point in the Newton-Raphson iteration, then call the CF code and read back...
  6. nastranuser123

    Finite element loads calculation

    Please can anyone help if possible?
  7. nastranuser123

    Finite element loads calculation

    Hi bkal, Thanks. Yes, I understand that by integrating a product of the shape function (displacement interpolation function) matrix with the applied load vector over the element volume / surface we can get the nodal loads. I just wanted to know, when the user defines a face load (on the face...
  8. nastranuser123

    Finite element loads calculation

    Hello, I shall be grateful if someone can chelp me with this and I'm really desperate for the solution! As of now, I have written a finite element program for the analysis of plates. In the pre-processor, I have applied the loads at the nodes of the finite element (or) at the edges of the...
  9. nastranuser123

    Local axis of a node

    I have seen that some softwares have the concept of local axis of node. I have never been able to really understand what is meant by lcoal axis of a node. Can anyone provide insight/simple example.
  10. nastranuser123

    NX Open question- Tree list

    Thank you very much, that was evry useful..
  11. nastranuser123

    NX Open question- Tree list

    I have created a Tree list through NX Open API's I am able to get selected nodes from Tree List using API tree_control0->GetSelectedNodes(); I need to get the nodes which are displayed in treelist without selecting i.e., want to get all the nodes displayed in treelist. Can anyone please help?
  12. nastranuser123

    Symmetric boundary condition- simple problem (facing issue)

    For example, see this problem http://www.adina.com/adinadownloads/primer/prob02.pdf It is similar, he just makes normal displacement as 0 at the 2 cutting edges. I did id at one cutting edge.
  13. nastranuser123

    Symmetric boundary condition- simple problem (facing issue)

    Is it possible to upload a dat file to illustrate what exactly you meant Sir?..I will really be grateful and obliged.
  14. nastranuser123

    Symmetric boundary condition- simple problem (facing issue)

    Dear Sir, Yes, I had prescribed symmetrical boundary conditions (i.e. the edge which is 38.1 mm has normal displacement as 0) i.e. DOF_X = 0 It did not solve.. Can you provided a sketch of what exactly u meant or the dat file? I have several models like this and am still not really getting it
  15. nastranuser123

    Symmetric boundary condition- simple problem (facing issue)

    Hi, I have uploaded the dat file into the location below http://files.engineering.com/getfile.aspx?folder=caf859ce-bcc1-4d5b-b94c-94b4abf31b8b&file=sim1-solution_1.dat Thanks, Chris
  16. nastranuser123

    Symmetric boundary condition- simple problem (facing issue)

    I shall be grateful if someone can help me with this This is the scenario I have: This problem is a pair of opposing shallow notches in a bar subject to tension. A linear elastic, plane strain idealisation is used and the results at the peak stress position are of interest. Please see the...
  17. nastranuser123

    NX - DMAP urgent information required

    I am looking in detail at the programmers guide to work out how to access and modify NX DMAP programs from there. Basically it seems to be by modifying the the executive control section of NX input files. Can anyone help and advise it is possible to write additional code in, say, FORTRAN or...
  18. nastranuser123

    Strain energy and strain energy density contours

    Can anyone advise,in what context have you used (if you have ever used) the strain energy contours in the software? What have you tried to interpret looking at the strain energy contours following a FE analysis? I have some thoughts on interpreting these contours and would like to share with...
  19. nastranuser123

    Starin energy contours

    I had been trying to understand how the straine energy contours available in FE software contours prove useful I had been reading this post http://www.eng-tips.com/viewthread.cfm?qid=43602 Can anyone comment on my interpretation below: When a body is deformed, work is done. The energy used...
  20. nastranuser123

    NX Hertz contact problem in SOL 101

    Sir, actually I'm not sure if I got that correctly. I'm just applying a tangential load at the location. I was thinking how to equilibrate that in rotation. The frictional force will provide the horizontal equilibrium. I was wondering about the rotational equilibrium ... Christ

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