Small amplitude dynamic properties of Ni48Ti46Cu6 SMA ribbons: experimental results and modelling

Research output: Contribution to journalArticle (Academic Journal)peer-review

8 Citations (Scopus)

Abstract

This work illustrates viscoelastic testing and fractional derivative modelling to describe the thermally induced transformation equivalent viscoelastic damping of NiTiCu SMA ribbons. NiTiCu SMA ribbons have been recently evaluated to manufacture novel honeycombs concepts (conventional and negative Poisson's ratio) in shape memory alloys for high damping and deployable sandwich antennas constructions. The dynamic mechanical thermal analysis (DMTA) test has been carried out at different frequencies and temperatures, with increasing and decreasing temperature gradients. Thermally induced transformations (austenitic and martensitic) provide damping peaks at low frequency range excitations. On the opposite, the storage moduli are not affected by the harmonic pulsation. As the SMA ribbon increases its stiffness, the damping capacity reduces, and the loss factor drops dramatically at austenite finish temperature. The fractional derivative models provide a compact representation of the asymmetry of the peak locations, as well as the storage modulus change from martensite to austenite phases.
Translated title of the contributionSmall amplitude dynamic properties of Ni48Ti46Cu6 SMA ribbons: experimental results and modelling
Original languageEnglish
Pages (from-to)260 - 267
Number of pages8
JournalJournal of Engineering Materials and Technology
Volume128 (3)
DOIs
Publication statusPublished - Jul 2006

Bibliographical note

Publisher: American Society of Mechanical Engineers

Fingerprint Dive into the research topics of 'Small amplitude dynamic properties of Ni<sub>48</sub>Ti<sub>46</sub>Cu<sub>6</sub> SMA ribbons: experimental results and modelling'. Together they form a unique fingerprint.

Cite this