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Article type: Research Article
Authors: Ma, Xiaopinga | Su, Sanqinga | Wang, Weia; | Yang, Yiyia | Yi, Shuchuna | Zhao, Xurana
Affiliations: [a] School of Civil Engineering, Xi’an University of Architecture & Technology Shaanxi, Xi’an, China
Correspondence: [*] Corresponding author: Wei Wang, School of Civil Engineering, Xi'an University of Architecture and Technology, No. 13, Yanta Road, Beilin District, Xi'an, Shaanxi 710055, China. Tel.: +86 13992812694; E-mail: [email protected]
Abstract: Torsion tests on 50 Mn steel wire were implemented and illustrated in this research to probe into the relationship between normal components of self-magnetic-flux-leakage (SMFL) signals Hp(y) and early damage of steel wire subjected to torsional stress. Besides, a modified model with due consideration of coercivity and permeability varying with equivalent stress at elastic-plastic stage was presented to simulate Hp(y) signals of steel wire under torsion accurately. Relevant numerical simulations of magneto-mechanical coupling were performed. The results show that using zero crossing point (ZCP) of Hp(y) signals to identify defect location does not apply to steel wire under torsion. However, there is crest (or trough) showing on magnetic signal curve prior to fracture. By utilizing location of crest (or trough), damage could be positioned accurately and ultimate fracture point could be forecasted in advance as well. Furthermore, simulation results obtained from the modified model are consistent with test results. Not only can study results demonstrate that MMM technique could be used for determining early damage of steel wire under torsion, but also provide certain reference for quantitative analysis about the relationship between damage and Hp(y) signals.
Keywords: Steel wire, torsion, magnetic memory method, damage location, magneto-mechanical coupling
DOI: 10.3233/JAE-180075
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 60, no. 2, pp. 223-246, 2019
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