Adaptable Structural Logic System Synthesis with Bistable Snap-Through Elements

Abstract : A passive structural logic system composed of bistable snap-through elements and synthesized into structural system with both high stiffness and high damping characteristics was developed. This system was demonstrated to achieve high damping performance and mitigate the shock and vibrations applied by dynamic environments. A ten-cell sub-assembly prototype structural system in axial configuration was designed, fabricated, and characterized to reach loss factor exceeding 1.0 A planar version of sub-assembly beam consists of honeycomb core and hybrid planar bistable snap-through elements was also synthesized, fabricated, and tested to reach loss factor exceeding 1.0 for frequency spectrum from 1 to 10 Hz. A framework to synthesize structural networks of multiple sub-assemblies was developed and allows exploring different serial and/or parallel connection between building blocks and sub-assemblies. The results show that the synthesized structural logic system can become an effective vibration suppression system adaptive to input amplitude and frequencies for sinusoidal and impulse loadings.

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