Methodology for the estimation of material damping as applied to superelastic shape memory alloy mini-springs
| Autor: | Richard Senko, Paulo César Sales da Silva, R. P. B. Dos Reis, Avenilda Silva, C.J. de Araújo |
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| Rok vydání: | 2019 |
| Předmět: |
Frequency response
Work (thermodynamics) Materials science business.industry Mechanical Engineering Resonance 02 engineering and technology Shape-memory alloy Structural engineering Particle displacement 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Mechanical system Mechanics of Materials Nickel titanium lcsh:TA401-492 lcsh:Materials of engineering and construction. Mechanics of materials General Materials Science 0210 nano-technology business |
| Zdroj: | Materials & Design, Vol 161, Iss, Pp 124-135 (2019) |
| ISSN: | 0264-1275 |
| DOI: | 10.1016/j.matdes.2018.11.012 |
| Popis: | This work presents an experimental methodology to estimate the material damping of superelastic helical mini-springs fabricated with superelastic shape memory alloys (SMA-SE). Moreover, the methodology provides a relatively inexpensive means for investigating the dynamic thermomechanical behavior of the NiTi SMA-SE mini-springs tested. This methodology is based on a resonance test in which the device is subjected to a mechanical reference system. We observed that four parallel mini-springs, each with a 0.033 g mass, have the capacity to reduce up to 6 dB of displacement amplitude (which represents an increase of 102% in hysteretic damping) in a mechanical system with a mass of 1485 g. Furthermore, a simplified analytical model is proposed based on observation of the frequency response function (FRF) of the mechanical system with the SMA-SE mini-springs. Keywords: Shape memory alloys, Superelastic mini-spring, Vibration attenuation, High damping metal |
| Databáze: | OpenAIRE |
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