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ML_79015751-Visitor
1-Visitor
November 10, 2022
Question

Design of a compliant mechanism in Creo

  • November 10, 2022
  • 2 replies
  • 1972 views

I would like to design a compliant hinge joint in the same vane as the one presented in this video: https://www.youtube.com/watch?v=uvPSsUkLypY&ab_channel=TheFACTsofMechanicalDesign

How would I go about doing so? So far as I can understand, I believe the solution lies somewhere in adding flexibility to the design, but I'm not entirely sure. I want to be able to model the rolling motion as well as the compliance of the connecting linkage if at all possible. Below I've shared what I've developed so far. 

    2 replies

    E
    EdvinTailwind13-Aquamarine
    13-Aquamarine
    November 10, 2022

    This is an extremely interesting project and I'm looking forward to see replies from the advanced users around here.

     

    However, I can't open the PRT you attached. Which Creo version are you using? (I'm "stuck" in 7.0.5.0, so if your version is newer that is most likely the issue)

    M
    MartinHanak24-Ruby III
    24-Ruby III
    November 10, 2022

    Hi,

    open prt file in Notepad and you will see version information.

      tbraxton
      22-Sapphire II
      tbraxton22-Sapphire II
      22-Sapphire II
      November 10, 2022

      If you are looking to design the flexible elements of such a mechanism, you should do some kinematic analysis to get close to a working geometry. See this web page and scroll down to the section titled Pseudo-Rigid Body Models. This is one approach to get close to a working geometry. Once you have the geometry defined you could use non-linear FEA (large displacement) to validate the design for stress limits.

       

      https://www.compliantmechanisms.byu.edu/about-compliant-mechanisms 

       

      Trial and error in Creo would involve creating motion skeleton models and use them to run kinematic analysis on the skeleton models to get to the initial geometry for the design.

       

      Another option is making parts. Guess at the shape and then cut some parts (laser cut card stock or wood?) and try it until it works if you want to use physical parts.

       

       

       

       

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