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

Yan, D; Sutcliffe, M; Wright, B; Cooper, I
September 2013
Insight: Non-Destructive Testing & Condition Monitoring;Sep2013, Vol. 55 Issue 9, p477
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.


Related Articles

  • Experimental observation of super-resolution imaging in highly attenuative media. Hutt, T.; Simonetti, F. // AIP Conference Proceedings;5/18/2012, Vol. 1430 Issue 1, p739 

    Conventional, linear imaging methods cannot resolve scatterers over a spatial scale approaching the wavelength of the probing wave according to the Rayleigh limit. Therefore, in highly attenuative media, resolution has to be traded against imaging depth because the short wavelengths needed for...

  • Measurement of Bulk Velocity and Attenuation in Fluids and Particle Suspensions Using the Quasi-Scholte Mode. Cegla, F. B.; Cawley, P.; Lowe, M. J. S. // AIP Conference Proceedings;2006, Vol. 820 Issue 1, p1245 

    An alternative method to conventional ultrasonic test cells for fluid bulk property measurements is presented in this paper. An interface wave, called the quasi-Scholte (QS) mode, is used to extract the necessary information. The sensitivity of the quasi-Scholte (QS) mode to the liquid...

  • The Use of a Normalized Derivative Approach for Ultrasonic Attenuation Coefficient Estimation. Cepel, R.; Neal, S. P. // AIP Conference Proceedings;2006, Vol. 820 Issue 1, p1155 

    The ultrasonic attenuation coefficient is an acoustic parameter routinely estimated in nondestructive evaluation. In this paper, we reformulate the attenuation coefficient estimation problem by taking normalized derivative approach. Depth dependence in scattering and attenuation are considered....

  • Measurement and Modeling of Ultrasonic Attenuation in Aluminum Rolled Plate. Anxiang Li; Hak-Joon Kim; Margetan, Frank; Thompson, R. B. // AIP Conference Proceedings;2006, Vol. 820 Issue 1, p1147 

    When fabricating a new set of calibration blocks for Aluminum 7075 plate inspections, it is advantageous that the new blocks have similar ultrasonic attenuation to existing block sets. This allows the new set to qualify under the same ASTM procedures used for older sets. In the course of...

  • THE ULTRASONIC MEASUREMENT OF CRYSTALLOGRAPHIC ORIENTATION FOR IMAGING ANISOTROPIC COMPONENTS WITH 2D ARRAYS. Lane, C. J. L.; Dunhill, A. K.; Drinkwater, B. W.; Wilcox, P. D. // AIP Conference Proceedings;6/23/2011, Vol. 1335 Issue 1, p803 

    Single crystal components are used widely in the gas-turbine industry. However, these components are elastically anisotropic which causes difficulties when performing NDE inspections with ultrasound. Recently an ultrasonic algorithm for a 2D array has been corrected to perform the reliable...

  • Degradation mechanisms in adhesive joints and the implications for NDE. Vine, K.; Cawley, P.; Kinloch, A. J. // AIP Conference Proceedings;2000, Vol. 509 Issue 1, p1301 

    It is well known that water has a detrimental effect on the performance of adhesive joints, and is amongst the most common elements for a bond to encounter in service. However, the exact nature of the changes produced by moisture in joints is less well understood, making the development a...

  • Assessment of real-time techniques for ultrasonic non-destructive testing. Robert, S.; Casula, O.; Njiki, M.; Roy, O. // AIP Conference Proceedings;5/18/2012, Vol. 1430 Issue 1, p1960 

    In industry, most of industrial components have complex and variable geometries, so that the use of ultrasonic transducer arrays often requires an implementation of specific algorithms in acquisition systems to achieve rapid and reliable inspections. In this context, this paper presents some...

  • Application of ultrasonic non-destructive characterisation on materials' quality evaluation. Xuemei Zhao; Tie Gang; Xuesong Liu; Shuqi Li // Insight: Non-Destructive Testing & Condition Monitoring;Apr2010, Vol. 52 Issue 4, p206 

    In this present work, the non-destructive characterisation technique has been undertaken for evaluating the inhomogeneous nature of 6XXX aluminium alloy. Samples containing extrusion welds and metal inert gas joints were inspected by an ultrasonic immersion C-scan system. The inhomogeneous...

  • An ultrasonic method for determination of acoustic impedance, time of flight, and attenuation of a thin linear-viscoelastic layer. Yao, Gui-Jin; Cui, Zhi-Wen; Song, Ruo-Long; Wang, Ke-Xie // Journal of Applied Physics;Nov2007, Vol. 102 Issue 10, p104903 

    A method for the determination of acoustic impedance, time of flight, and attenuation of an immersed thin linear-viscoelastic layer on a substrate of infinite extent is proposed as the transfer functions of the normally incident ultrasonic reflected signals are given. Utilizing the derived...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics