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  1. ansysUPF

    UPF programming for 4-node user element

    On my way to change the LINK8(original uel101.F) to LINK 2, what has happend.
  2. ansysUPF

    HOW TO COMPILE A MATERIAL SUBROUTINE IN ANSYS?

    online UPF Guide, but a 5.5 version, however the only one I could find in internet. I think ifc, the fortran compiler is enough, why c/c++ one also necessary?
  3. ansysUPF

    Compiling and Linking UPFs

    Mistake above: ~restart is wrong, the right command should be: ~reset after using this ~reset command, message reads: ~RESET was processed: The external command buffers have been cleared. I used to use USRCAL, and it worked at least once. I've no idea why it now doesn't work anymore, since I...
  4. ansysUPF

    Active DOF

    Oh, I forgot to say: I do meshing with my own element, i.e, The input file for meshing is always the same. I modify the element quite often in order to get some valuable results to compare.
  5. ansysUPF

    Active DOF

    @feadude, You are right, I deleted the calculating displacement transformation part in the program, there are 2 fixed nodes, but the others should have transformations on them. I want to simplify the programm to the possiblly least. @johnhors I always have the right mesh, I just do some changes...
  6. ansysUPF

    Compiling and Linking UPFs

    on UNIX Systems I can compile the UPFs successfully, but I have problem in Activating UPFs. each time after compiling I have to restart ANSYS, before I apply my customized user element. I have tried by Issuing the USRCAL command as UPF Guide says, and ~restart Well,this command is not...
  7. ansysUPF

    Active DOF

    Could anyone be so kind to give a newbie, me, a short or detailed explaination of Active DOF? what is it? And how to use? My problem: when I am using ANSYS to solve my problem, in the SOLU procedure, there is a warning said : There are no active degrees of freedom. SPARSE MATRIX DIRECT...
  8. ansysUPF

    UPF programming for 4-node user element

    My 1st step: a)modify uel101.F and test with testcases. b)modify the uec101.F and uel101.F to be LINK1 element, so as to get some feeling. 2nd step: try to write a similar element to my target element, for instance, a 4-node linear or quadraliteral element for 2D linear isotropic...
  9. ansysUPF

    UPF programming for 4-node user element

    Since nobody replied. I'm going to give my steps. Maybe wrong, but I am trying. and will tell my results later. Cuz i myself don't know the results yet. and i believe many people have such experiences.
  10. ansysUPF

    UPF programming for 4-node user element

    I want to creat a 4-node user element for 2D isotropic inhomogeneous material, the most important part is the stiffness matrix I need to offer. And later I want to extend it into 8-node element(like PLANE82, triangular option should also be available). Any help or information will be greatly...

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