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Nondestructive characterization of the elastic properties of orthotropic composites with ultrasound

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Abstract
Due to the increasing use of composite materials in critical applications demanding light weight to high strength ratio, reliable evaluation tools are necessary. The field of ultrasound is a well known non-destructive method, in which the classical C-scan has already proven its usefulness in visualizing defects, delaminations, ... Though, because of the limitations for quantitatively characterizing a material using a C-scan, the quest for more sophisticated methods is a big challenge in current research. A polar scan, which makes use of oblique incidence of ultrasound, can serve as a prominent successor of more classical methods. By gathering the reflected (or transmitted) amplitude of the ultrasonic beam, one is able to built a polar plot which covers a certain solid angle. Typically, dark rings are observed in a polar plot which can be linked to the generation of critical bulk waves (pulsed regime) or to the generation of surface waves (harmonic regime). Both types of waves are vigorous entangled with the elastic constants of the material. This implicates that a polar scan is a great candidate tool to investigate anisotropic materials non-destructively, where the mapped amplitudes are a local fingerprint of the investigated material.
Keywords
anisotropy, NDT, elastic properties, ultrasound, polar scan

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MLA
Kersemans, Mathias et al. “Nondestructive Characterization of the Elastic Properties of Orthotropic Composites with Ultrasound.” Sampe Europe Technical Conference, Proceedings. Ghent, Belgium: Ghent University, Department of Materials Science and Engineering, 2011. Print.
APA
Kersemans, M., Van Paepegem, W., Zastavnik, F., Gu, J., Sol, H., & Degrieck, J. (2011). Nondestructive characterization of the elastic properties of orthotropic composites with ultrasound. Sampe Europe Technical Conference, Proceedings. Presented at the Sampe Europe Technical Conference (SETEC-11) : Advanced composites, the integrated system, Ghent, Belgium: Ghent University, Department of Materials Science and Engineering.
Chicago author-date
Kersemans, Mathias, Wim Van Paepegem, Filip Zastavnik, Jun Gu, Hugo Sol, and Joris Degrieck. 2011. “Nondestructive Characterization of the Elastic Properties of Orthotropic Composites with Ultrasound.” In Sampe Europe Technical Conference, Proceedings. Ghent, Belgium: Ghent University, Department of Materials Science and Engineering.
Chicago author-date (all authors)
Kersemans, Mathias, Wim Van Paepegem, Filip Zastavnik, Jun Gu, Hugo Sol, and Joris Degrieck. 2011. “Nondestructive Characterization of the Elastic Properties of Orthotropic Composites with Ultrasound.” In Sampe Europe Technical Conference, Proceedings. Ghent, Belgium: Ghent University, Department of Materials Science and Engineering.
Vancouver
1.
Kersemans M, Van Paepegem W, Zastavnik F, Gu J, Sol H, Degrieck J. Nondestructive characterization of the elastic properties of orthotropic composites with ultrasound. Sampe Europe Technical Conference, Proceedings. Ghent, Belgium: Ghent University, Department of Materials Science and Engineering; 2011.
IEEE
[1]
M. Kersemans, W. Van Paepegem, F. Zastavnik, J. Gu, H. Sol, and J. Degrieck, “Nondestructive characterization of the elastic properties of orthotropic composites with ultrasound,” in Sampe Europe Technical Conference, Proceedings, Leiden, The Netherlands, 2011.
@inproceedings{2072866,
  abstract     = {{Due to the increasing use of composite materials in critical applications demanding light weight to high strength ratio, reliable evaluation tools are necessary. The field of ultrasound is a well known non-destructive method, in which the classical C-scan has already proven its usefulness in visualizing defects, delaminations, ... Though, because of the limitations for quantitatively characterizing a material using a C-scan,  the quest for more sophisticated methods is a big challenge in current research. A polar scan, which makes use of oblique incidence of ultrasound, can serve as a prominent successor of more classical methods. By gathering the reflected (or transmitted) amplitude of the ultrasonic beam, one is able to built a polar plot which covers a certain solid angle. Typically, dark rings are observed in a polar plot which can be linked to the generation of critical bulk waves (pulsed regime) or to the generation of surface waves (harmonic regime). Both types of waves are vigorous entangled with the elastic constants of the material. This implicates that a polar scan is a great candidate tool to investigate anisotropic materials non-destructively, where the mapped amplitudes are a local fingerprint of the investigated material.}},
  author       = {{Kersemans, Mathias and Van Paepegem, Wim and Zastavnik, Filip and Gu, Jun and Sol, Hugo and Degrieck, Joris}},
  booktitle    = {{Sampe Europe Technical Conference, Proceedings}},
  isbn         = {{9783953356548}},
  keywords     = {{anisotropy,NDT,elastic properties,ultrasound,polar scan}},
  language     = {{eng}},
  location     = {{Leiden, The Netherlands}},
  pages        = {{8}},
  publisher    = {{Ghent University, Department of Materials Science and Engineering}},
  title        = {{Nondestructive characterization of the elastic properties of orthotropic composites with ultrasound}},
  year         = {{2011}},
}