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Superelastic SMA Belleville washers for seismic resisting applications: experimental study and modelling strategy

Lookup NU author(s): Dr Xiaoyi Zhou

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Abstract

This study sheds considerable light on the potential of superelastic shape memory alloy Belleville washers for innovative seismic resisting applications. A series of experimental studies were conducted on washers with different stack combinations under varying temperatures and loading scenarios. The washers showed satisfactory self-centring and energy dissipation capacities at room temperature, although slight degradations of the hysteretic responses accompanied by residual deformations were induced. The hysteretic loops became stable after a few number of cycles, indicating good repeatability. The washers also showed good flexibility in terms of load resistance and deformation, which could be easily varied via changes in the stack combination. Compromised self-centring responses were observed at temperatures below 0 degrees C or above 40 degrees C, and a numerical study, validated by the experimental results, was adopted to further investigate the deformation mechanism of the washers. A further phenomenological model, taking account of the degradation effects under varied temperatures, was developed to enable effective and accurate simulation of devices incorporating the washers. Good agreements were observed between the test and simulation results, and the model was shown to have good numerical robustness for wide engineering applications.


Publication metadata

Author(s): Fang C, Zhou XY, Osofero AI, Shu Z, Corradi M

Publication type: Article

Publication status: Published

Journal: Smart Materials and Structures

Year: 2016

Volume: 25

Issue: 10

Online publication date: 16/09/2016

Acceptance date: 02/08/2016

ISSN (print): 0964-1726

ISSN (electronic): 1361-665X

Publisher: IOP Publishing

URL: http://dx.doi.org/10.1088/0964-1726/25/10/105013

DOI: 10.1088/0964-1726/25/10/105013


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Funding

Funder referenceFunder name
Program for Young Excellent Talents in Tongji University
51408437National Natural Science Foundation of China (NSFC)

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