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SPECIAL SECTION ON DAMPING OF SHAPE MEMORY ALLOYS, COMPOSITES, AND FOAMS

Small Amplitude Dynamic Properties of Ni48Ti46Cu6 SMA Ribbons: Experimental Results and Modelling

[+] Author and Article Information
C. Remillat

Department of Aerospace Engineering, University of Bristol, Queens Building, University Walk, BS8 1TR, UK

M. R. Hassan

Department of Mechanical Engineering, University of Sheffield, S1 3JD Sheffield, UK

F. Scarpa1

Department of Aerospace Engineering, University of Bristol, Queens Building, University Walk, BS8 1TR, UKf.scarpa@bris.ac.uk

1

Corresponding author.

J. Eng. Mater. Technol 128(3), 260-267 (Jan 24, 2006) (8 pages) doi:10.1115/1.2204949 History: Received September 07, 2005; Revised January 24, 2006

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.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

One-cycle quasistatic test on SMA ribbon-full martensite

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Figure 2

One-cycle quasistatic test on SMA ribbon-full austenite

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Figure 3

Storage modulus and loss factor versus temperature-heating process

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Figure 4

Storage modulus and loss factor versus temperature-cooling process

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Figure 9

Comparison between fractional derivative model and experimental results during the heating process. 엯, experimental values; —, analytical model.

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Figure 5

Storage modulus versus temperature and frequency-heating process

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Figure 6

Storage modulus and loss factor versus temperature and frequency-heating process. ∗ - frequencies from 1Hzto7.74Hz. 엯, frequencies from 11.4Hzto60Hz.

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Figure 7

Fractional derivative representation of storage modulus and loss factor for the SMA ribbon-cooling process

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Figure 8

Fractional derivative representation of storage modulus and loss factor for SMA ribbon-heating process

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