Abstract
The field of negative stiffness metamaterials (NSM) is a rapidly developing area within the realm of mechanical metamaterials. This work presents a novel negative stiffness metamaterial based on a bistable structure that consists of a straight beam with an elastic element shaped like a ring. Further, this work presents the findings of a Taguchi-based experiment aimed at optimizing geometrical parameters in negative stiffness metamaterial. The Taguchi method, known for its efficiency in experimental design and analysis, was employed to systematically study the effects of various factors on snapping force for a novel structure exhibiting negative stiffness. The experiment utilized L18 mixed level orthogonal array. All the test samples were fabricated using additive manufacturing technique. Signal-to-noise ratio analysis and analysis of variance were two statistical approaches that were used to comprehensively evaluate the acquired data. The results of this study provide valuable insights into the optimal geometrical configuration for maximizing snapping force of negative stiffness metamaterial.
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