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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Involute Development, LLC
Consulting Engineers
Specialists in Creo Parametric
