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Mechanical behavior of NiTi-based circular tube chiral structure manufactured by selective laser melting

Ma, Chenglong, Gu, Dongdong, Gao, Jie, Chen, Wei, Song, Yingjie and Setchi, Rossitza 2020. Mechanical behavior of NiTi-based circular tube chiral structure manufactured by selective laser melting. Presented at: 7th International Conference on Sustainable Design and Manufacturing KES-SDM 2020, Virtual, 9-11 September 2020. Published in: Scholz, Steffen G., Howlett, Robert J. and Setchi, Rossi eds. Sustainable Design and Manufacturing 2020: Proceedings of the 7th International Conference on Sustainable Design and Manufacturing (KES-SDM 2020). Smart Innovation, Systems and Technologies Singapore: pp. 227-237. 10.1007/978-981-15-8131-1_21

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Abstract

In this work, a new NiTi-based circular tube chiral (CTC) structure with compression-induced-twisting effect was proposed, inspired by the spiranthes cernua’s tendril, which was then manufactured by selective laser melting (SLM). The compressive deformation behavior and coupled twisting feature of NiTi-based CTC structure were disclosed in detail based on the experimental method and simulation approach. It was found that the twisting angle per axial strain λ achieved by the experiment and the simulation was roughly consistent with the result (1.5068°/%) based on the theoretical calculation within a small deformation. As the strain increased, the λ rapidly declined and finally stabilized at round 0.6°/%. Furthermore, the recoverable behaviors of the axial strain and the twisting angle after the unloading were also evaluated in views of the reversible martensitic transformation of NiTi alloys. After six cycles, the recoverable strain or twisting angle ratio could reach approach to 1. This work could be expected to provide a guiding significance to some degree for the development of functional components (such as smart actuators) with a stable and reversible twisting behavior applied in the aerospace field.

Item Type: Conference or Workshop Item (Paper)
Date Type: Published Online
Status: Published
Schools: Engineering
ISBN: 9789811581304
ISSN: 2190-3018
Last Modified: 02 Aug 2021 12:45
URI: http://orca.cardiff.ac.uk/id/eprint/142838

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