Biphasic Unconfined Compression Relaxation

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  • ateshian
    Developer
    • Dec 2007
    • 1824

    #46
    Hi Ahmet,

    It is B. Each node has 3 displacement DOFs and 1 pressure DOF.

    Best,

    Gerard

    Comment

    • NuelD
      Junior Member
      • Mar 2017
      • 3

      #47
      Many thanks!

      Comment

      • abhi1947
        Junior Member
        • Jul 2017
        • 1

        #48
        Hello I have a quick question. Does FEBIO have fiber features for the "biphasic" material, just like it has the fiber option for the "neo-Hookean" material? Because everytime I try to run my code, I always get a zero diagonal error.

        Thank you,
        abhi1947

        Comment

        • ateshian
          Developer
          • Dec 2007
          • 1824

          #49
          Hi abhi1947,

          The fiber should work with the biphasic material. Can you post a (small) file that illustrates the problem you are having?

          Best,

          Gerard

          Comment

          • Laura Montserrat
            Junior Member
            • Jun 2023
            • 1

            #50
            Hey Steve,
            I followed the tutorial but got stuck at the very last part because I do not have the "use most points" option when editing the step. Therefore I cannot edit the curve and if I run it without this modification, it takes ages and it gives warnings. And when I opened your file, it says the same, the load controller 2 is not used.
            Thanks,
            Laura

            Comment

            • maas
              Lead Code Developer
              • Nov 2007
              • 3400

              #51
              Hi Laura,

              I assume you are using the latest version of FEBio Studio? If so, the option to "use must points" is not there anymore, and the way to define must-points is to simply assign a load curve to the max stepsize (dtmax) parameter. Please try this:
              1. After setting up the rest of the model, open the Curve Editor (menu Tools\Curve Editor).
              2. In the left panel, locate the dtmax parameter (e.g. Model>Steps>Step1>time_stepper>dtmax).
              3. On the right panel, click the New... button and select load curve. Click OK. This will assign the load curve to the dtmax parameter and effectively enable must-points.
              4. Edit the load curve as needed by defining the time/value points.

              Let me know if that worked.

              Best,

              Steve
              Department of Bioengineering, University of Utah
              Scientific Computing and Imaging institute, University of Utah

              Comment

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