TITLE

Ultrasonic imaging of full matrix capture acquired data for carbon fibre-reinforced polymer

AUTHOR(S)
Yan, D; Sutcliffe, M; Wright, B; Cooper, I
PUB. DATE
September 2013
SOURCE
Insight: Non-Destructive Testing & Condition Monitoring;Sep2013, Vol. 55 Issue 9, p477
SOURCE TYPE
Periodical
DOC. TYPE
Article
ABSTRACT
Carbon fibre-reinforced polymer (CFRP) composites are increasingly used in safety and infrastructure-critical applications in the aerospace and renewable energy industries. However, such material poses a significant challenge to the ultrasonic non-destructive testing process due to its high attenuation, inhomogeneous structure and anisotropic acoustic properties. Current methods are limited to the implementation of inspection using ultrasonic beams normal to the surface. This is due to the velocity varying angularly within composites, which leads to unpredictable inspection results when using oblique beams. This paper describes two methods used to determine the measurement of velocity variations present in CFRP components with the aim of providing a velocity profile applied to the full matrix capture (FMC) imaging algorithm. From these measurements, a modified version of the total- focusing method (TFM) algorithm is provided, which allows for velocity changes in relation to the angle to be considered. Experimental results are then presented, indicating successful incorporation of the velocity profile where fully- focused imagery of several side-drilled holes was generated from a CFRP component.
ACCESSION #
90480171

 

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