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Cross-correlation-based algorithm for absolute stress evaluation in steel members using the longitudinal critically refracted wave

Li, Zuohua, He, Jingbo, Teng, Jun and Wang, Ying (2018) Cross-correlation-based algorithm for absolute stress evaluation in steel members using the longitudinal critically refracted wave International Journal of Distributed Sensor Networks, 14 (10).

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Abstract

The absolute stress in the in-serviced steel members is a critical indicator employed for the evaluation of structural performance. In the field of structural health monitoring, the stress is usually monitored by the stress monitoring system. However, the monitored stress is the relative value, rather than the absolute value. The longitudinal critically refracted (Lcr) wave has shown potential for use in absolute stress measurement. The accurate measurement of the Lcr wave time-of-flight (TOF) is the core issue with this method. In this study, a cross-correlation-based algorithm is presented for stress evaluation using the Lcr wave. Specifically, a cross-correlation theoretical formula is derived and a five-step framework is proposed for the Lcr wave TOF measurement. Four steel members are employed to investigate the parametric calibration using the Lcr wave to measure the stress. On this basis, the proposed cross-correlation-based algorithm is used to evaluate the stress of a steel member. The results indicate that the cross-correlation-based algorithm can measure the Lcr wave TOF without filtering the noise signal, and the stress measurement results are better than those of the traditional peak value method. The proposed method provides a potential way to measure the absolute stress in practical engineering applications.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
NameEmailORCID
Li, Zuohua
He, Jingbo
Teng, Jun
Wang, Yingying.wang@surrey.ac.uk
Date : 1 October 2018
DOI : 10.1177/1550147718803312
Copyright Disclaimer : This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
Uncontrolled Keywords : cross-correlation-based algorithm, longitudinal critically refracted (Lcr) wave, absolute stress measurement, steel members, acoustoelasticity
Depositing User : Melanie Hughes
Date Deposited : 29 Nov 2018 11:50
Last Modified : 04 Dec 2018 18:25
URI: http://epubs.surrey.ac.uk/id/eprint/849952

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