hello i have a task to create a clips without any coil or spring and its look like a pacman that in his stable mode his "mouth" close.

I built a mechanism that will open the clips and my question is whitch material i should use to the clips for it will not break or bend and always returns to its static mode after it opened by the mechanism.

my second question is how do i use the simulation of the immotion between the clips and the machanism in the solidworks

thank u!!