Steel structure members are widely used in modern constructions. Crucial structure members (i.e., the steel frame or hoist in an oil platform) should be monitored frequently since deterioration of such members jeopardizes safety of human and leads to economic loss. An active fiber optic sensor (FOS) utilizing the photoacoustic effect has been proposed for actively generating surface ultrasonic waves. By combining this FOS with a FOS receiver, surface corrosion detection of steel structures using ultrasound can be accomplished. In this study, surface ultrasonic wave propagation behavior in intact and corroded steel rod was investigated using finite element method. Ultrasonic waves (radial displacements) were collected by different FOS receivers and compared with each other. Spacing of sensors were optimized based on the simulation results. A surface corrosion detection method for steel rod was developed.
Mendez, A., and T. Graver, “Overview of fiber optic sensors for NDT applications,” Proceedings of IV NDT Panamerican Conference, Buenos Aires, Argentina, October 2007.
Zou, X., A. Chao, Y. Tian, N. Wu, H. Zhang, T. Yu, X. Wang, “An experimental study on the concrete hydrationmprocess using Fabry–Perot fiber optic temperature sensors,” Measurement, Volume 45, Issue 5, June 2012.
Zou, X., A. Chao, N. Wu, Y.Tian, T. Yu and X. Wang, “A novel Fabry-Perot fiber optic temperature sensor for early age hydration heat study in Portland cement concrete,” Smart Structures and System, Volume 12, Issue 1, July, 2013.
Zou, X., N. Wu, Y. Tian, X. Wang, “Broadband miniature fiber optic ultrasound generator,” Optical Express, Volume 22, pp. 18119–18127, 2014.
Zou, X., T. Schmitt, D. Perloff, N. Wu, T. Yu, and X. Wang, "Nondestructive corrosion detection using fiber optic photoacoustic ultrasound generator," Measurement, Volume 62, pp.74-80, 2015.
ABAQUS v6.11 Analysis User's Manual, “ABAQUS Documentation,” Dassault Systèmes, Providence, RI, USA.
Tang. Q and T. Yu. “Finite element simulation of ultrasonic waves in corroded reinforced concrete for early-stage corrosion detection," Proc. SPIE 10169, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2017, 101691N, April 2017.
77 Page Views
0 PDF Downloads
0 Facebook Shares