TY - GEN
T1 - Tunable Load Adjustment Mechanism by SMA-Actuated Bistable Beam
AU - Zhang, Yuhang
AU - Zhang, Xiaoyong
AU - Jiang, Jun
AU - Zhang, Qiang
AU - Zhou, Yuanzi
AU - Sun, Ruijie
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.
PY - 2025
Y1 - 2025
N2 - A novel SMA-actuated bistable beam was fabricated and investigated to fulfill load adjustment in this study. The SMA curved beam actuator was connected with the compliant beam, implementing both load bearing and self-actuating. The prototype and the fabrication process of the bistable mechanism were also developed. Considering multiple inflection points in the deflection curve, the bistable snap-back mechanism was modeled and analyzed through large deflection theory. Moreover, the moment–angle curve, the evolution of deflection modes, and the energy landscape were presented. The key characteristic of the studied bistable system was the capability of horizontal load adjustment during snap-back, which was employed to design the fully compliant mechanisms with variable ranges of load adjustment. Experiments were conducted to test the performance of load adjustment. It was found that the decrease of horizontal load could be reached. The adjustment range of horizontal load could be controlled through the geometric parameters of compliant beam and SMA curved beam actuator. Moreover, the bistable beam could be reset by applying a concentrated force and cycling actuation test was conducted to confirm that point. The proposed bistable mechanism is compact, self-actuating, and fully compliant, implying the potential application in programmable structures and metamaterials.
AB - A novel SMA-actuated bistable beam was fabricated and investigated to fulfill load adjustment in this study. The SMA curved beam actuator was connected with the compliant beam, implementing both load bearing and self-actuating. The prototype and the fabrication process of the bistable mechanism were also developed. Considering multiple inflection points in the deflection curve, the bistable snap-back mechanism was modeled and analyzed through large deflection theory. Moreover, the moment–angle curve, the evolution of deflection modes, and the energy landscape were presented. The key characteristic of the studied bistable system was the capability of horizontal load adjustment during snap-back, which was employed to design the fully compliant mechanisms with variable ranges of load adjustment. Experiments were conducted to test the performance of load adjustment. It was found that the decrease of horizontal load could be reached. The adjustment range of horizontal load could be controlled through the geometric parameters of compliant beam and SMA curved beam actuator. Moreover, the bistable beam could be reset by applying a concentrated force and cycling actuation test was conducted to confirm that point. The proposed bistable mechanism is compact, self-actuating, and fully compliant, implying the potential application in programmable structures and metamaterials.
KW - Bistable beam
KW - Fully compliant mechanisms
KW - Large deflection analysis
KW - Shape memory alloy actuator
KW - Snap-back
UR - https://www.scopus.com/pages/publications/105005256597
U2 - 10.1007/978-981-96-1467-7_22
DO - 10.1007/978-981-96-1467-7_22
M3 - 会议稿件
AN - SCOPUS:105005256597
SN - 9789819614660
T3 - Lecture Notes in Mechanical Engineering
SP - 331
EP - 343
BT - Advances in Mechanism and Machine Science and Engineering in China - Proceedings of IFToMM CCMMS 2024
A2 - Chen, Yan
A2 - Liu, Lujiang
A2 - Liu, Xinjun
A2 - Liu, Haitao
A2 - Li, Ming
A2 - Sun, Tao
PB - Springer Science and Business Media Deutschland GmbH
T2 - 24th IFToMM China International Conference on Mechanism and Machine Science and Engineering, IFToMM CCMMS 2024
Y2 - 12 August 2024 through 14 August 2024
ER -