TY - JOUR
T1 - Superelastic SMA Belleville washers for seismic resisting applications
T2 - experimental study and modelling strategy
AU - Fang, Cheng
AU - Zhou, Xiaoyi
AU - Osofero, Adelaja Israel
AU - Shu, Zhan
AU - Corradi, Marco
N1 - Funding Information:
The work presented in this paper is supported by the National Natural Science Foundation of China (NSFC) with Grant No. 51408437. The support from the Program for Young Excellent Talents in Tongji University is also gratefully acknowledged.
Publisher Copyright:
© 2016 IOP Publishing Ltd.
PY - 2016/10/1
Y1 - 2016/10/1
N2 - 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 °C or above 40 °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.
AB - 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 °C or above 40 °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.
KW - belleville washers
KW - numerical study
KW - phenomenological model
KW - self-centring
KW - shape memory alloy (SMA)
KW - superelastic
UR - http://www.scopus.com/inward/record.url?scp=84989953800&partnerID=8YFLogxK
U2 - 10.1088/0964-1726/25/10/105013
DO - 10.1088/0964-1726/25/10/105013
M3 - Article
AN - SCOPUS:84989953800
VL - 25
JO - Smart Materials and Structures
JF - Smart Materials and Structures
SN - 0964-1726
IS - 10
M1 - 105013
ER -