TY - JOUR
T1 - Integrated mechanical and material design of quasi-zero-stiffness vibration isolator with superelastic Cu-Al-Mn shape memory alloy bars
AU - Araki, Yoshikazu
AU - Kimura, Kosuke
AU - Asai, Takehiko
AU - Masui, Takeshi
AU - Omori, Toshihiro
AU - Kainuma, Ryosuke
N1 - Funding Information:
This research was supported by the Toray Science Foundation . Mr. Nobutoshi Yoshida, a technical researcher of Kyoto University, and Mr. Yoshito Nojiri, a former undergraduate student of Kyoto University who helped to conduct the experiments. The authors gratefully acknowledge the supports mentioned above.
Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/12/8
Y1 - 2015/12/8
N2 - Quasi-zero-stiffness (QZS) vibration isolators avoid excessive deformation due to gravity, a critical issue in vertical vibration isolation, by providing restoring force with high initial stiffness and low tangent stiffness around the static equilibrium position. Effective use of geometric nonlinearity often plays a central role in QZS mechanisms. Design of such QZS mechanisms, however, tends to be complex, and it is difficult to realize large loading capacity as well as large stroke length at the same time. This paper attempts to resolve these issues by applying newly developed superelastic Cu-Al-Mn shape memory alloy (SMA) bars, characterized by excellent recoverable strain upon unloading along with small hysteresis and nearly flat stress plateau. These features are realized by material design tailored for obtaining mechanical properties required in QZS mechanisms. The use of such tailored superelastic Cu-Al-Mn SMA bars allows us to easily achieve large loading capacity as well as large stroke length while keeping the QZS mechanism simple and compact. In this paper, we derive design equations, produce a prototype, and conduct shaking table tests and numerical simulations to demonstrate the feasibility of QZS vibration isolator with superelastic Cu-Al-Mn SMA bars.
AB - Quasi-zero-stiffness (QZS) vibration isolators avoid excessive deformation due to gravity, a critical issue in vertical vibration isolation, by providing restoring force with high initial stiffness and low tangent stiffness around the static equilibrium position. Effective use of geometric nonlinearity often plays a central role in QZS mechanisms. Design of such QZS mechanisms, however, tends to be complex, and it is difficult to realize large loading capacity as well as large stroke length at the same time. This paper attempts to resolve these issues by applying newly developed superelastic Cu-Al-Mn shape memory alloy (SMA) bars, characterized by excellent recoverable strain upon unloading along with small hysteresis and nearly flat stress plateau. These features are realized by material design tailored for obtaining mechanical properties required in QZS mechanisms. The use of such tailored superelastic Cu-Al-Mn SMA bars allows us to easily achieve large loading capacity as well as large stroke length while keeping the QZS mechanism simple and compact. In this paper, we derive design equations, produce a prototype, and conduct shaking table tests and numerical simulations to demonstrate the feasibility of QZS vibration isolator with superelastic Cu-Al-Mn SMA bars.
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U2 - 10.1016/j.jsv.2015.08.018
DO - 10.1016/j.jsv.2015.08.018
M3 - Article
AN - SCOPUS:84942294213
VL - 358
SP - 74
EP - 83
JO - Journal of Sound and Vibration
JF - Journal of Sound and Vibration
SN - 0022-460X
ER -