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The design of a compliant shape-preserving ring

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Compliant shape-preserving mechanisms fullfil a tiny niche within the established research field of compliant mechanisms. To date no report exists on a compliant shape-preserving ring, that is while these mechanisms… Click to show full abstract

Compliant shape-preserving mechanisms fullfil a tiny niche within the established research field of compliant mechanisms. To date no report exists on a compliant shape-preserving ring, that is while these mechanisms can give rise to a multitude of practical applications. They can essentially act as novel sealing mechanisms, compliant grippers or find use in medical applications. This thesis presents three compliant shape-preserving rings that maintain their circular shape up to 99% for their full range-of-motion. The best design can expand in diameter by 45%. A prototype of a compliant shape-preserving ring was constructed from PETG (Polyethylene Terephtalate Glycol-modified) using fused-filament-fabrication. The experimental evaluation of this prototype showed a good agreement with the numerical model describing the design. A novel compliant scissor mechanism was obtained in the design process and this mechanism can prove useful in the design of other compliant shape-preserving mechanisms.

Keywords: shape; compliant shape; preserving ring; shape preserving; design compliant

Journal Title: Mechanism and Machine Theory
Year Published: 2020

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