In this section
@article{Zimmermann:2021:10.1098/rspa.2020.0380,
author = {Zimmermann, A and Huthwaite, P and Pavlakovic, B},
doi = {10.1098/rspa.2020.0380},
journal = {Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences},
title = {High-resolution thickness maps of corrosion using SH1 guided wave tomography},
url = {http://dx.doi.org/10.1098/rspa.2020.0380},
volume = {477},
year = {2021}
}
TY - JOUR
AB - Quantifying corrosion damage is vital for the petrochemical industry, and guided wave tomography can provide thickness maps of such regions by transmitting guided waves through these areas and capturing the scattering information using arrays. The dispersive nature of the guided waves enables a reconstruction of wave velocity to be converted into thickness. However, existing approaches have been shown to be limited in in-plane resolution, significantly short of that required to accurately image a defect target of three times the wall thickness (i.e. 3 T) in each in-plane direction. This is largely due to the long wavelengths in the fundamental modes commonly used, being around 4 T for both A0 and S0 at the typical operation points. In this work, the suitability of the first-order shear-horizontal guided wave mode, SH1, has been investigated to improve the resolution limit. The wavelength at the desired operating point is significantly shorter, enabling an improvement in resolution of around 2.4 times. This is first verified by realistic finite-element simulations and then validated by experimental results, confirming the improved resolution limit can now allow defects of maximum extent 3T-by-3T to be reliably detected and sized, i.e. a long-pursued goal of guided wave tomography has been achieved.
AU - Zimmermann,A
AU - Huthwaite,P
AU - Pavlakovic,B
DO - 10.1098/rspa.2020.0380
PY - 2021///
SN - 1364-5021
TI - High-resolution thickness maps of corrosion using SH1 guided wave tomography
T2 - Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
UR - http://dx.doi.org/10.1098/rspa.2020.0380
UR - http://hdl.handle.net/10044/1/86113
VL - 477
ER -