Structural applications of SMA/superelastic materials

Eugene I. Rivin; Gautam Sayal; Prithvi Raj Singh Johal

doi:10.1117/12.596511

16 May 2005 Structural applications of SMA/superelastic materials

Eugene I. Rivin, Gautam Sayal, Prithvi Raj Singh Johal

Proceedings Volume 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics; (2005) https://doi.org/10.1117/12.596511
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

SMA and superelastic materials (SEM) are mostly used for low force/large displacements applications involving tensile or bending modes of loading. The paper describes experiments on radial compression of SMA and 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 10-100 N/mm range for tubes of OD = 0.4-2 mm have been observed. The 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 close-form analysis for thin-wall tubes and some realized and potential applications of GSE are described.

Citation Download Citation

Eugene I. Rivin, Gautam Sayal, and Prithvi Raj Singh Johal "Structural applications of SMA/superelastic materials", Proc. SPIE 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, (16 May 2005); https://doi.org/10.1117/12.596511

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