| Autor: |
R.P.B. dos Reis, P.C.S. Silva, R. Senko, A.A. Silva, C.J. de Araújo |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Materials & Design, Vol 161, Iss , Pp 124-135 (2019) |
| Druh dokumentu: |
article |
| 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: |
Directory of Open Access Journals |
| Externí odkaz: |
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Full Text from ScienceDirect