Characteristic Parameters of Magnetostrictive Guided Wave Testing for Fatigue Damage of Steel Strands

Author:

Chen Xiaohui1,Xu Jiang2ORCID,Li Yong2,Wang Shenghuai1

Affiliation:

1. School of Mechanical Engineering, Hubei University of Automotive Technology, Shiyan 442002, China

2. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Abstract

Steel strands are widely used in structures such as bridge cables, and their integrity is critical to keeping these structures safe. A steel strand is under the working condition of an alternating load for a long time, and fatigue damage is unavoidable. It is necessary to find characteristic parameters for evaluating fatigue damage. In this study, nonlinear coefficients and attenuation coefficients were employed to evaluate fatigue damage based on magnetostrictive guided wave testing. Unlike pipe and steel wire structures, there is a phenomenon of a notch frequency when guided waves propagate in steel strands. The influence of the notch frequency on the nonlinear coefficient and attenuation coefficient is discussed. The relationship between the nonlinear coefficient, attenuation coefficient, and cyclic loading times was obtained through experiments. The amplitudes of the nonlinear coefficient and attenuation coefficient both increased with the increase in cyclic loading times. The experiments also showed the effectiveness of using these two characteristic parameters to evaluate fatigue damage.

Funder

National Natural Science Foundation of China

Key Research and Development Project of Hubei Province of China

Publisher

MDPI AG

Subject

General Materials Science

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