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Non-linear methods based on ultrasonic waves to analyse disbonds in single lap joints

Scarselli, G, Ciampa, F, Nicassio, F and Meo, M (2017) Non-linear methods based on ultrasonic waves to analyse disbonds in single lap joints PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, 231 (16). pp. 3066-3076.

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Adhesive bonded lap joints are widely used in the aerospace field and non-destructive testing (NDT) techniques are critical in evaluating the quality of adhesion before and during use. Two types of bonded samples have been experimentally investigated in order to verify the reliability of non-linear elastic wave spectroscopy (NEWS) based on the use of ultrasound. Piezoelectric sensors have been attached to the samples and used as generators and receivers. Both the samples have shown non-linearities in their dynamic behaviour. Non-linear metrics have been applied to their structural responses over an assigned range of excitation frequencies based on higher order harmonic analysis in order to evaluate the degree of non-linearity of the samples. Possible interpretations of the experimental behaviour are provided in the paper based also on tomographic testing of the adhesive layer that showed the presence of microbubbles in the bond due to manufacturing process.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Scarselli, G
Nicassio, F
Meo, M
Date : 1 August 2017
DOI : 10.1177/0954406217704222
Copyright Disclaimer : Copyright 2017 Sage Publishing
Uncontrolled Keywords : Debonding; Disbonds; Damage detection; Non-linear elastic wave spectroscopy; Structural health monitoring
Depositing User : Diane Maxfield
Date Deposited : 17 Sep 2019 10:30
Last Modified : 17 Sep 2019 10:30

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