Engineering Transactions, 62, 1, pp. 17-31, 2014
10.24423/engtrans.41.2014

The Use of Computed Tomography and Ultrasonic Imaging for Assessment of Defects in Plates Made of a Polyesteric Resin

Daniela Ioana TUDOR
University Politehnica, Department of Strength of Materials, Faculty of Engineering and Management of Technological Systems, Splaiul Independentei 313, Sector 6, 060042, Bucharest
Romania

Stefan Dan PASTRAMA
University Politehnica, Department of Strength of Materials, Faculty of Engineering and Management of Technological Systems, Splaiul Independentei 313, Sector 6, 060042, Bucharest
Romania

Anton HADAR
University Politehnica, Department of Strength of Materials, Faculty of Engineering and Management of Technological Systems, Splaiul Independentei 313, Sector 6, 060042, Bucharest
Romania

The paper presents an experimental assessment of defects in a layered plate made of a polyesteric resin (plastic material). Two non-destructive methods were used: X-ray computed tomography and ultrasonic imaging. The main purpose of this work was to establish the position, shape and size of the defects that appeared during the manufacturing process. A three-dimensional model was obtained from the X-ray tomography using specific software for data processing. The model was used in order to evaluate the effect of defects on the integrity of the analyzed structure, by comparing the numerical results with the ones for a similar plate without defects. Some considerations on the efficiency of the two used experimental methods are also presented.
Keywords: X-ray computed tomography, ultrasonic imaging, finite element method, defects.
Full Text: PDF
Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

References

Blitz J., Simpson G., Ultrasonic Methods of Non-destructive Testing, Champman & Hall, London, UK, 1996.

Ensminger D., Bond L., Ultrasonics – Fundamentals, Technologies and Application, CRC Press, New York, 2011.

Seeram E., Computed tomography – Physical Principles, Clinical Applications and Quality Control, third edition, Saunders Elsevier, St. Louis, Missouri, 2009.

D’Orazio T., Leo M., Distante A., Guaragnella C., Pianese V., Cavaccini G., Automatic ultrasonic inspection for internal defect detection in composite materials, NDT&E International, 41, 145–154, 2008.

Garnier C., Pastor M.-L., Eyma F., Lorrain B., The detection of aeronautical defects in situ on composite structures using Non Destructive Testing, Composite Structures, 93, 1328–1336, 2011.

Kazys R., Tumsys O., Pagodinas D., Ultrasonic detection of defects in strongly attenuating structures using the Hilbert-Huang transform, NDT&E International, 41, 457–466, 2008.

Pau M., Leban B., Baldi A., Simultaneous subsurface defect detection and contact parameter assessment in a wheel-rail system, Wear, 265, 1837–1847, 2008.

Ferrie E., Buffiere J.Y., Ludwig W., 3D characterisation of the nucleation of a short fatigue crack at a pore in a cast Al alloy using high resolution synchrotron microtomography, International Journal of Fatigue, 27, 1215–1220, 2005.

Vanderesse N., Maire E., Chabod A., Buffiere J.Y., Microtomographic study and finite element analysis of the porosity harmfulness in a cast aluminium alloy, International Journal of Fatigue, 33, 1514–1525, 2011.

Scott A.E., Mavrogordato M., Wright P., Sinclair I., Spearing S.M., In situ fibre fracture measurement in carbon-epoxy laminates using high resolution computer tomography, Composites Science and Technology, 71, 1471–1477, 2011.

Sharma R., Mahajan P., Kumar Mittal R., Elastic modulus of 3D carbon/carbon composite using image-based finite element simulations and experiments, Composite Structures, 98, 69–78, 2013.

Wiesauer K., Pircher M., Gotzinger E., Hitzenberger C.K., Oster R., Stifter D., Investigation of glass–fibre reinforced polymers by polarisation-sensitive, ultra-high resolution optical coherence tomography: Internal structures, defects and stress, Composites Science and Technology, 67, 3051–3058, 2007.

Blacklock M., Bale H., Begley M., Cox B., Generating virtual textile composite specimens using statistical data from micro-computed tomography: 1D tow representations for the Binary Model, Journal of the Mechanics and Physics of Solids, 60, 451–470, 2012.

Hua Z.W., De Carlo F., Noninvasive three-dimensional visualization of defects and crack propagation in layered foam structures by phase-contrast microimaging, Scripta Materialia, 59, 1127–1130, 2008.

Cho I.S., Hwang J.H., Yang S.M., Lim C.H., Evaluation of defects in aluminum piston castings by using ultrasonics and computer tomography, China Foundry, 9, 3, 275–278, 2012.

Tudor D.I., Contributii privind evaluarea cantitativa a influentei defectelor de material asupa capacitatii portante a unor structuri (Contributions regarding the quantitative evaluation of the influence of material defects on the carrying capacity of some structures)

(in Romanian) PhD Thesis, University Politehnica of Bucharest, 2012.

* * * eFilm Workstation R – User Guide, Merge Healthcare Incorporated, 2010.

Soare M., Performance Characterization of Nondestructive Methods for Flow Detection and Sizing in CANDU Pressure Tubes. Part. I: Ultrasonic Spectroscopy Investigation Using Longitudinal Waves for Interrogation, NNDT Report no. RCD-ICC-AIEA-27.1/2001, Nuclear NDT Research & Services, Bucharest, Romania, 2001.




DOI: 10.24423/engtrans.41.2014