Flextensional transducers with shape memory caps for tunable devices

Authors
Meyer, RJ Newnham, RE
Citation
Rj. Meyer et Re. Newnham, Flextensional transducers with shape memory caps for tunable devices, J IN MAT SY, 11(3), 2000, pp. 199-205
Citations number
18
Categorie Soggetti
Material Science & Engineering
Journal title
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
ISSN journal
1045389X → ACNP
Volume
11
Issue
3
Year of publication
2000
Pages
199 - 205
Database
ISI
SICI code
1045-389X(200003)11:3<199:FTWSMC>2.0.ZU;2-7
Abstract
Shape memory alloys were used as caps for the "cymbal" flextensional transd ucer. The active caps provide a tunable resonance frequency and a damage re covery mechanism associated with the alloy's martensitic phase transformati on. These two concepts were investigated and a 25% change in resonance freq uency was observed for Ni-Ti alloy caps. It was also demonstrated that comp lete shape recovery could be achieved after hydrostatic pressures buckled t he transducer caps. Cap deformation and recovery were demonstrated with pro filometer and d(h) measurements.