NDT assessment of bonded assemblies - Image optimization for weak bond characterization using ultrasonic array transducer

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

119 Downloads (Pure)

Abstract

Compromised interface bonds in structural components can lead to premature loss of structural integrity. Such defects are very difficult to detect using traditional acoustic inspection techniques. We assess the ability of linear ultrasonic Non-Destructive Testing (NDT) methods to detect or differentiate between weak-kissing bonds from healthy ones, by using a set of contaminated and non-contaminated bonds. An Ultrasonic Array Transducer (UAT) enables increased informational content, hence they have been used to detect and differentiate compromised bonds. Considerable research has been made into detecting weak bonds, but a practical, cost effective and industrially applicable solution remains elusive. The key problem is the signal changes are small, therefore we have developed an iterative testing methodology, in which the experimental variation in each of the following steps is significantly reduced: Sample Preparation; Data Acquisition; Imaging[1, 2]; Feature Analysis[3, 4]; Characterization/Classification; Interpretation. Our research addresses the issues related to UAT measurement techniques, specifically Full Matrix Capture (FMC)[1, 2] and Total Focusing Method (TFM)[1, 2], Scattering Matrix(derived) [3, 4] extraction in time domain, and other related or derived methods. Here the optimization of bondline imaging, resulting in higher quality and coherence of the imaging, is presented and discussed.

Original languageEnglish
Title of host publication17th annual Anglo-French Physical Acoustics Conference (AFPAC)
Subtitle of host publication17–19 January 2018, Selsdon Park Hotel, Surrey, United Kingdom
PublisherIOP Publishing
Number of pages16
Volume1184
Edition1
DOIs
Publication statusPublished - 1 Apr 2019
Event17th Annual Anglo-French Physical Acoustics Conference, AFPAC 2018 - Surrey, United Kingdom
Duration: 17 Jan 201819 Jan 2018

Publication series

NameJournal of Physics: Conference Series
PublisherIOP Publishing
ISSN (Print)1742-6588

Conference

Conference17th Annual Anglo-French Physical Acoustics Conference, AFPAC 2018
CountryUnited Kingdom
CitySurrey
Period17/01/1819/01/18

Fingerprint Dive into the research topics of 'NDT assessment of bonded assemblies - Image optimization for weak bond characterization using ultrasonic array transducer'. Together they form a unique fingerprint.

Cite this