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Recent content by Tina a

  1. Tina a

    having problem to run model with two steps

    I could finally run the model. Thanks to both of you.
  2. Tina a

    Urgent help needed

    Yes, the things you told is totally true. Also, I have thought about all those questions which you are asking about. Without thinking about those things there is no point in doing any kind of work. And I do know it is going to take a lot of time. I simplified the question in beginning because I...
  3. Tina a

    having problem to run model with two steps

    Hi IceBreakerSours, Thank you very much. I did remove the boundary conditions on the nodes where tie constraints were already applied. But my model is still not converging in step 2. Step 1 is complete. Could there be any other method to fix the rod fully rather than applying boundary condition...
  4. Tina a

    having problem to run model with two steps

    Hi Dave442, Thank you very much. I applied velocity constraint on left rod in step 2, the rod could distract for few more increments but eventually the model died. There are two rods (upper and lower) on each side- two rods on left side and two rods on right side. The rods on each side are...
  5. Tina a

    having problem to run model with two steps

    I have a spine model where screws are placed posteriorly (proximally and distally). And two rods are placed into the screws on right and left side. I want to distract one rod at a time and then fix it and distract the other rod. This is to compare differences in stress on the rods when...
  6. Tina a

    having problem to run model with two steps

    Hi Dave442, I looked at the warnings but I could not figure out the exact cause. Could you please have a look at the .dat file and help me know how can I fix this? Thank you.http://files.engineering.com/getfile.aspx?folder=85d9c0f8-ba66-4faf-aeb0-88eabe0d8fee&file=bc1.zip
  7. Tina a

    having problem to run model with two steps

    Hi, I am running my analysis in two steps. The model is running in step 1 but not converging in step 2. The model had same time incrementation in both steps. I did change the increment size in step 2, the model tries to converge taking a long time but eventually dies. Could it be because of the...
  8. Tina a

    Urgent help needed

    Thank you. I have copied the link below. No clinician is guiding me, I have been looking various videos and several papers for understanding what the procedure involves. Basically, I want to simulate placement of rods into the screws and connector (as seen in the video) from a certain distance...
  9. Tina a

    Urgent help needed

    Hi IceBreakerSours, Thanks for your response. My advisor is not into finite element analysis so I have to figure out on my own. Since I am new to this, if you can give some ideas or give info about articles related to this kind of surgical simulations if you know about them, it would be really...
  10. Tina a

    Urgent help needed

    Hi, Thank you. Actually I simplified my question. I am trying to simulate a surgery. Top part of the rod should be first put into the pedicle screws and then tightened. After this, the bottom part of the rod should be put inside the cylindrical object. If the cylindrical object has length of...
  11. Tina a

    Urgent help needed

    Hi, I need to run an analysis in Abaqus where a rod is supposed to be placed inside a cylindrical object which is at a certain distance from the rod. Half of the rod's length should be inside the cylindrical hole. Is this procedure possible to simulate in Abaqus? If yes, can anyone give some...
  12. Tina a

    Running FORTRAN code

    Thank you VahidMlb.
  13. Tina a

    USDFLD can't read "ESEDEN" or "SENER" (Strain Energy Density) for bone remodeling.

    Hi VahidMlb, I am sorry that my question was not clear. I was looking for the CMD command. Yes, I am totally new regarding this, never used subroutine before and its been quite difficult searching for the code. Thanks for your response.
  14. Tina a

    USDFLD can't read "ESEDEN" or "SENER" (Strain Energy Density) for bone remodeling.

    Hi, Since some of you were discussing about the USDFLD subroutine, I wanted to know if any of you know if there is USDFLD code available somewhere for the growth simulation in scoliotic spine. I have searched but not found any. Also, what is the proper abaqus command to run an analysis that...
  15. Tina a

    Running FORTRAN code

    Thank you IceBreakerSours.
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