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Title: Crack depth profiling using guided wave angle dependent reflectivity

Abstract

Tomographic corrosion monitoring techniques have been developed, using two rings of sensors around the circumference of a pipe. This technique is capable of providing a detailed wall thickness map, however this might not be the only type of structural damage. Therefore this concept is expanded to detect and size cracks and small corrosion defects like root corrosion. The expanded concept uses two arrays of guided-wave transducers, collecting both reflection and transmission data. The data is processed such that the angle-dependent reflectivity is obtained without using a baseline signal of a defect-free situation. The angle-dependent reflectivity is the input of an inversion scheme that calculates a crack depth profile. From this profile, the depth and length of the crack can be determined. Preliminary experiments show encouraging results. The depth sizing accuracy is in the order of 0.5 mm.

Authors:
; ;  [1]
  1. TNO, Stieltjesweg 1, P.O. box 155 2600 AD Delft (Netherlands)
Publication Date:
OSTI Identifier:
22391266
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1650; Journal Issue: 1; Conference: 41. Annual Review of Progress in Quantitative Nondestructive Evaluation, Boise, ID (United States), 20-25 Jul 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; CORROSION; CRACKS; DAMAGE; DATA TRANSMISSION; DEFECTS; DEPTH; LENGTH; MONITORING; REFLECTION; REFLECTIVITY; SENSORS; THICKNESS; TRANSDUCERS

Citation Formats

Volker, Arno, E-mail: arno.volker@tno.nl, Pahlavan, Lotfollah, E-mail: arno.volker@tno.nl, and Blacquiere, Gerrit, E-mail: arno.volker@tno.nl. Crack depth profiling using guided wave angle dependent reflectivity. United States: N. p., 2015. Web. doi:10.1063/1.4914681.
Volker, Arno, E-mail: arno.volker@tno.nl, Pahlavan, Lotfollah, E-mail: arno.volker@tno.nl, & Blacquiere, Gerrit, E-mail: arno.volker@tno.nl. Crack depth profiling using guided wave angle dependent reflectivity. United States. doi:10.1063/1.4914681.
Volker, Arno, E-mail: arno.volker@tno.nl, Pahlavan, Lotfollah, E-mail: arno.volker@tno.nl, and Blacquiere, Gerrit, E-mail: arno.volker@tno.nl. Tue . "Crack depth profiling using guided wave angle dependent reflectivity". United States. doi:10.1063/1.4914681.
@article{osti_22391266,
title = {Crack depth profiling using guided wave angle dependent reflectivity},
author = {Volker, Arno, E-mail: arno.volker@tno.nl and Pahlavan, Lotfollah, E-mail: arno.volker@tno.nl and Blacquiere, Gerrit, E-mail: arno.volker@tno.nl},
abstractNote = {Tomographic corrosion monitoring techniques have been developed, using two rings of sensors around the circumference of a pipe. This technique is capable of providing a detailed wall thickness map, however this might not be the only type of structural damage. Therefore this concept is expanded to detect and size cracks and small corrosion defects like root corrosion. The expanded concept uses two arrays of guided-wave transducers, collecting both reflection and transmission data. The data is processed such that the angle-dependent reflectivity is obtained without using a baseline signal of a defect-free situation. The angle-dependent reflectivity is the input of an inversion scheme that calculates a crack depth profile. From this profile, the depth and length of the crack can be determined. Preliminary experiments show encouraging results. The depth sizing accuracy is in the order of 0.5 mm.},
doi = {10.1063/1.4914681},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1650,
place = {United States},
year = {Tue Mar 31 00:00:00 EDT 2015},
month = {Tue Mar 31 00:00:00 EDT 2015}
}