Abstract
In this paper, we proposed a new pneumatic actuation method inspired from a soft robot, which could drive the multi-stable carbon fiber-reinforced polymer (CFRP) structure transition among five stable configurations under air pressure. Multi-stable structure was manufactured by the carbon fiber prepreg laid in asymmetrical and anti-symmetric layup methods and stacked at the joint during the preparation process according to the designed scheme. In experiments, multi-stable structures with two different fibers layups were prepared to study the snap-through behaviors. The snap-through process of two kinds of multi-stable structures was investigated by experiment. The parameters used to characterize efficiency of the pneumatic actuator actuating the multi-stable structures, including air pressure and snap time, were measured. The influence of the pneumatic actuator on the curvature of multi-stable structures was discussed by comparing the shape characteristic of multi-stable structures with or without pneumatic actuation, and it showed pneumatic actuator has little effect to the structure. The results demonstrated that the proposed pneumatic actuation could be used to drive multi-stable morphing structure flexibly. The combination of multi-stable laminates develops the function of multiple point bending and shape retention of pneumatic actuation.
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Funding
This research was supported by the National Natural Science Foundation of China (Grant Nos. 51675485, 11672269, 51775510) and the Zhejiang Provincial Natural Science Foundation of China (Grant No. LR18E050002).
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Ni, X., Liao, C., Li, Y. et al. Experimental study of multi-stable morphing structures actuated by pneumatic actuation. Int J Adv Manuf Technol 108, 1203–1216 (2020). https://doi.org/10.1007/s00170-020-05301-1
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DOI: https://doi.org/10.1007/s00170-020-05301-1