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  • Users: plvachon
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  1. plvachon

    Problem when plotting graph in V12

    Hi all, Has anyone experienced problems plotting graphs with Ansys V12 (APDL)? I am creating a short table (2 col, 4 rows) and want to plot one column as function of the other. The following code works fine with V11, but with V12 only the name of the table and the title of my graph are...
  2. plvachon

    Composite machining: Diamond or Diamondlike coating?

    Hello all, I need to make some machining on carbon/epoxy composite parts, so i have to buy some diamond-coated endmills. I found two types of coatings in the catalogs: diamond and diamondlike coatings, with diamondlike being half the price of diamond. Has anyone already tried diamondlike-coated...
  3. plvachon

    Any paint suitable for carbon fabric?

    Hello all, Does anyone know any type of paint/primer/whatever that can be sprayed on top of carbon fabric, without altering the resin infusion properties and mechanical properties (fiber/resin adherence, resin strength, and so on...)? I would like to "draw" the shape of the carbon/epoxy samples...
  4. plvachon

    Max. allowed length of a command line in M-files?

    Hello all, Does anyone know a command that could allow me to know the maximum allowed length of a command line in M-files? I have a very long expression to solve and I would like to know if I have to cut it into smaller expressions. Thanks!
  5. plvachon

    using the fsolve command

    Hello all, My question relates to Matlab syntax and the way Matlab communicates between M-files and function files. I am trying to solve a system of 2 non-linear equations (with 2 unknowns) using the fsolve command. I wrote a function (function solu = myequations(guess)) that contains my 2...
  6. plvachon

    Carbon/epoxy with Ti-Ni: Galvanic Corrosion?

    Hello everyone, I am currently designing a structure made of carbon fiber composite plates (the resin is epoxy) incorporating some Ti-Ni inserts. Ti-Ni is a shape memory alloy. I am wondering if there could be a galvanic corrosion problem with this design (carbon with Ti-Ni). The structure is...
  7. plvachon

    Layered plates: interlaminar calculations

    Hi all, This is not my first post on that subject, but I don't find any input. So I will try here to simplify my problem. I want to extract the interlaminar stresses at an interface between 2 layers, for a composite plate under uniaxial extension. For instance, if I take a [45/-45]s laminate...
  8. plvachon

    Composites FEA: interlaminar stresses

    Hi everyone, Here is a question about interlaminar stresses in Ansys. As you know, obtaining interlaminar stresses between two layers of a composite is quite tricky in FE analysis. But I'm wondering about the right way to get Sxz (shear interlaminar stress) at a particular interface. In my...
  9. plvachon

    Changing the system of units in "Relations" code

    Hi all, I'm wondering if it is possible to switch from a system of units to another by programming in the "Relations" menu. I know I can write "If" commands and so on, but is there a system variable that specifies the system of units and that I could change in the Relations code? Thanks in...
  10. plvachon

    Interlaminar stresses with Solid46

    Hi to all, I'm trying to calculate interlaminar stresses in a composite plate (Sxz, Syz), and I compare my results with those from other authors. I'm using Solid46 elements with 2 elements through thickness for each layer. the case is very simple: a rectangular plate under uniaxial tension...
  11. plvachon

    Calling Matlab from Ansys input file?

    Hi, I need to solve an equation (numerically) in Ansys... May I call a Matlab session from an Ansys input file, and then use the solution from Matlab to continue the process in Ansys? In other words, I must find the value(s) of x for which f(x)=y, with y known. I mention that f(x) is a...
  12. plvachon

    Using 2 processors for FE analysis???

    Hi, Is this possible to solve a FE analysis using the 2 processors of my computer? I know the command /CONFIG,nproc exists in Ansys, but it allows the use of only "n-1" processors, in order to keep 1 processor ready for other tasks... I mention that I'm on Win XP and my computer has a dual-core...
  13. plvachon

    Can't use the /MAIL command! (Ansys 8.0)

    Hi to all, I'm trying to send an email at the end of an Ansys session with the /MAIL command, but the system tells me he can't find the attached file. I'm using Ansys 8.0, maybe this is the reason of this problem... Someone told me there is some configuration to do before using this command...
  14. plvachon

    Weird mesh on straigth sections...

    Hi Pro/M lovers, I experienced a weird problem with the automatic meshing of Pro/M. The model is a Z-shaped lever made with a rectangular rod, so the model (built on Pro/E) has 3 straigth sections and 2 fillets. The problem comes with the meshing operation: the mesher creates several nodes on...
  15. plvachon

    Creating more than 1 animation in a Do-loop, is this possible?

    I'm trying to create 2 animations (thus 2 *.avi files) with 2 different ETABLE results, and I don't find the way to do it. I'd like to get a frame for each Do-Loop and for each ETABLE plotting. Is this something possible? For example, here is the procedure I would like to do: ... *DO,... ...
  16. plvachon

    Command lines for using Tsai-Wu failure criteria

    I'm a little bit confused about the Tsai-Wu failure criteria used with Solid46 elements. I tried to program the criteria by myself (with the equations in the help files), in order to verify if the results would be the same as the pre-programmed criteria, but they are not. Maybe the problem comes...
  17. plvachon

    Question about composites and symmetry

    Hi, I'm wondering if I can use symmetries with layered elements, like Solid 46. For example, if I'm modelling a rectangular plate made of an isotropic material, I can model only one eigth of the plate, since it is 3 times symmetric (length, width and thick.). With composite materials, I guess...
  18. plvachon

    How to make a popup window appear?

    Hi to all! Is it possible to create a popup message in Ansys? I'd like to make a window appear with a user-defined message into it, when a specific condition is met. Thanks in advance...
  19. plvachon

    Tsai-Wu failure criterion with solid46 layered elements

    Here is a "philosophical" question about the SOLID46 layered elements... When I'm modelling a plate under tensile loading with SOLID46 (1 element through thickness and 2 layers for the element), I get logical results regarding the Tsai-Wu failure criterion. However, if I set the element to be...
  20. plvachon

    SOLID46, 1 layer elements: problem with failure criteria

    Hi, I'm having a problem with using SOLID46 elements in a composite analysis: I'm modelling a rectangular plate under tensile loading, with a variable number of layers through thickness. The displacement is set incrementally, in order to see the propagation of the rupture. When I do the...

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