IBBM 2017

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Type: Posts; User: shady

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    Thanks Dr. Gerard for your kind reply. Shady

    Thanks Dr. Gerard for your kind reply.

    Shady
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    negative pressure

    Hello,

    I am working on a spine model in which I have defined the intervertebral disc with a biphasic material. After successfully running Flex/Ext simulation, I found -ve values of pressure in the...
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    Thanks Dr.Steve for your prompt answer. I will...

    Thanks Dr.Steve for your prompt answer.

    I will try to increase the PF step by step and see what will happen.

    Best,

    Shady
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    Thanks Dr.Steve for your prompt answer. I will...

    Thanks Dr.Steve for your prompt answer.

    I will try to increase the PF step by step and see what will happen.

    Best,

    Shady
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    How can I use penalty factor correctly?

    Hello,

    I am simulating a spine model with implantable devices, such as pedicle screws and rods and I am applying flex/Ext moments on the upper spine level while fixing the lower one.

    I defined...
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    Thanks Dr.Ateshain, this is a nice alternative. ...

    Thanks Dr.Ateshain, this is a nice alternative.

    Best,

    Shady
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    Thanks Dr.Steve, that was helpful! Shady

    Thanks Dr.Steve, that was helpful!

    Shady
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    Fatal Error message

    Hi all,

    I was running a knee FE model and i received this error message: " Fatal Error: Rigid body rotations cannot mix prescribed and free components."
    I defined the femur and tibia as rigid...
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    under-constrained model

    Hello,

    I have a problem in running a spine model (T11-S1) with a fused junction at L1 level. The model include all spine constituents (IVDs, facet joints, ligaments, cortical and cancellous bones)...
  10. Hi Dr.Steve, I send you the model via email...

    Hi Dr.Steve,

    I send you the model via email (steve dot maas at utah dot edu). I hope you received it.

    Shady
  11. Dr.steve, Do you have any other suggestion to...

    Dr.steve,

    Do you have any other suggestion to solve this problem?

    Shady
  12. Hi Dr.steve, I tried it on version 2.2 right...

    Hi Dr.steve,

    I tried it on version 2.2 right now. It produced a bunch of -ve jacobian error messages from the beginning of the run!
    It looks very weird!

    Shady
  13. Thanks Dr.Steve for your kindly reply. ...

    Thanks Dr.Steve for your kindly reply.

    Unfortunately, when i used the tied interface, the same error was generated again (beside it is not fitting my application).

    Also, i didn't understand...
  14. Sliding interface with force driven simulation

    Hi all,

    I was trying to simulate 2 spine vertebrae separated by a rigid inter-body during flexion/extension exercise. I used to attach a rigid body on the top vertebrae to apply the moment, and i...
  15. Thread: Importing data

    by shady
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    Thanks Kevin for your kindly reply, it was really...

    Thanks Kevin for your kindly reply, it was really useful.
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    Thanks Dr.Dave, i figure it out. However,...

    Thanks Dr.Dave, i figure it out.
    However, sometimes when i tries to import input files (.inp) Preview crashes!!

    Do you know what could be the reason for that?

    Best,
    Shady
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    File import porblem

    Hello,

    I used ABAQUS to mesh a vertebral body and then export it as an input file then i imported this file on Preview. I did this process many times recently but one week ago an error message...
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    Thanks Mousa, i already figure it out.

    Thanks Mousa, i already figure it out.
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    Hi Steve, thanks for your kindly reply,...

    Hi Steve,

    thanks for your kindly reply, actually i am modeling a joint with a ligament in which the bones are defined as a rigid body, the cartilage as a biphasic material, and the ligaments as...
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    applying moment with springs

    Hello,

    I have a problem in applying a moment in a rigid boy which is connected to a nonlinear spring.
    i attached a file of a simple model to show the problem. Although in this simple model FEBio...
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    Local coordinates for fibers

    Hi

    I am trying to assign bi-phasic material to a cartilage in which the solid type is a solid mixture of Neo-Hookean and fibers.
    I specified a local fiber direction for elements as Gerard did in...
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    Non-Linear Tension only spring

    Hi,
    Can we model non-linear tension only spring?
    and if yes, How?

    Best regards
    Shady
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    Great, it works thanks steve

    Great, it works

    thanks steve
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    Thanks Steve, it's now clear

    Thanks Steve, it's now clear
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    I am very grateful for your kindly fast rely....

    I am very grateful for your kindly fast rely. I'll try you suggestions and let you know if i faced any problems

    thanks
    Shady
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