Bistable mechanisms have two stable equilibrium positions separated by a higher energy unstable equilibrium position. They are well suited for microswitches, microrelays, and many other macro- and micro-applications. This paper discusses a bistable buckled beam actuated by a moment input. A theoretical model is developed for predicting the necessary input moment. A novel experimental test setup was created for experimental verification of the model. The results show that the theoretical model is able to predict the maximum necessary input moment within 2.53%. This theoretical model provides a guideline to design bistable compliant mechanisms and actuators. It is also a computational tool to size the dimensions of buckled beams for actuating a specific mechanism.
Modeling and Experimental Validation of Actuating a Bistable Buckled Beam Via Moment Input
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received December 23, 2014; final manuscript received March 16, 2015; published online March 31, 2015. Assoc. Editor: Taher Saif.
Cleary, J., and Su, H. (May 1, 2015). "Modeling and Experimental Validation of Actuating a Bistable Buckled Beam Via Moment Input." ASME. J. Appl. Mech. May 2015; 82(5): 051005. https://doi.org/10.1115/1.4030074
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