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Nitinol superelastic materials (SEM) are mostly used for low-force/large displacements applications involving tensile or bending modes of loading.The paper describes experiments on the radial compression of superelastic wires and tubes between flat loading surfaces.Elastic (recoverable) deformations-up to 22.5% with high damping under loads in the kN/mm range for solid wires, and the 10-100 N/mm range for tubes with an outer diameter of 0.4-2 mm-have been observedThe recoverable deformation as great as 60% has been measured on a thin-walled SEM tube.This phenomenon was named a "giant superelasticity effect" (GSE).The experiments were performed in a broad range of loading rates.Stainless-steel specimens were also tested for comparison.A closed-form anal. for thin-wall tubes, and some realized and potential applications of GSE, are described.

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