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The design of compliant mechanisms is crucial in several technologies andrelies on the availability of solutions for nonlinear structural problems. Oneof these solutions is given and experimentally validated in the present articlefor a compliant mechanism moving along a smooth curved profile. In particular,a deformable elastic rod is held by two clamps, one at each end. The firstclamp is constrained to slide without friction along a curved profile, whilethe second clamp moves in a straight line transmitting its motion through theelastic rod to the first clamp. For this system it is shown that the clampsliding on the profile imposes nontrivial boundary conditions (derived via avariational and an asymptotic approach), which strongly influence buckling andnonlinear structural behaviour. Investigation of this behaviour shows that acompliant mechanism can be designed, which gives an almost neutral response incompression. This behavior could easily be exploited to make a force limitingdevice. Finally a proof-of-concept device was constructed and tested showingthat the analyzed mechanical system can be realized in practice and it behavestightly to the model, so that it can now be used in the design of machines thatuse compliant mechanisms.

The deformation of an elastic rod with a clamp sliding along a smooth and curved profile