Simulations of harmonic and pulsed ultrasonic polar scans

Declercq, Nico F.; Degrieck, Joris; Leroy, Oswald

doi:10.1016/j.ndteint.2005.07.004

Cited by 16 publications

(24 citation statements)

References 39 publications

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“…Hence, the P-UPS image comprises a large collection of amplitudes of obliquely transmitted (or reflected) ultrasound pulses. Within the amplitude landscape of the P-UPS, characteristic contours emerge that more or less relate to the condition for critical (or in-plane) stimulation of the quasi-longitudinal, horizontally and vertically polarized quasi-transverse wave modes [2]. Note that along symmetry orientations, the prefix "quasi-" may be omitted, resulting in pure wave modes.…”

Section: Introductionmentioning

confidence: 99%

The Ultrasonic Polar Scan for Composite Characterization and Damage Assessment: Past, Present and Future

et al. 2016

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Abstract:In the early 1980's, the ultrasonic polar scan (UPS) technique was developed to assess the fiber direction of composites in a nondestructive way. In spite of the recognition by several researchers as being a sophisticated and promising methodology for nondestructive testing (NDT) and materials science, little advance was made during the following 30 years. Recently however, the UPS technique experienced a strong revival and various modifications to the original UPS setup have been successfully implemented. This revival has exposed several powerful capabilities and interesting applications of the UPS technique for material characterization and damage assessment. This paper gives a short historical overview of the UPS technique for characterizing and inspecting (damaged) fiber-reinforced plastics. In addition, a few future research lines are given, which will further expand the applicability and potential of the UPS method to a broader range of (damaged) materials, bringing the UPS technique to the next level of maturity.

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Section: Introductionmentioning

confidence: 99%

The Ultrasonic Polar Scan for Composite Characterization and Damage Assessment: Past, Present and Future

et al. 2016

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“…The simulation model is founded on a cascade matrix technique [10], and is fully applicable to simulate UPS of immersed layered viscoelastic anisotropic media. Compared to existing simulation models [5][6], we were able to significantly reduce the computational time. The next step we took was the implementation of an inverse procedure to couple experiment to simulation, in view of identifying composite parameters.…”

Section: Revisiting the Ultrasonic Polar Scanmentioning

confidence: 98%

“…He used it for detecting fatigue damage in composites and determining the fiber volume fraction [2][3]. The UPS research has been further extended by Declercq who implemented a simulation model on the basis of a global matrix method [4][5][6]. ___________ He also experimented with a time-of-flight (TOF) version of the P-UPS method, and commented on the superior sensitivity (compared with amplitude recording) to the presence of damage [7].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Ultrasonic Polar Scan Method for Characterizing (Degraded) Fiber Reinforced Plastics

Kersemans¹,

Martens²,

Paepegem³

et al. 2015

Structural Health Monitoring 2015

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“…An incoming harmonic beam on the other hand, produces the conditions to efficiently excite a Lamb mode. Hence the fingerprint depends upon the frequency f of the considered harmonic source (Declercq et al, 2006a, Degrieck et al, 2003.…”

Section: Physical Background Of Polar Scanmentioning

confidence: 99%

“…This paper reports experimentally registered polar scans which are compared with numerically computed polar scans for a variety of composite materials, using both pulsed and harmonic ultrasonic beams. Typically, dark rings are observed in a polar plot, which are linked to the generation of critical bulk waves (pulsed regime) or to the generation of guided waves (harmonic regime) (Declercq et al, 2006a, Declercq et al, 2006b, Degrieck et al, 2003. Both types of waves are vigorously entangled with the elastic constants of the material (Rose, 1999, Nayfeh and Chimenti, 1988, Auld, 1990).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical polar scans of several anisotropic materials using pulsed and harmonic ultrasonic beams

Kersemans

Baere

Paepegem

et al. 2012

Emerging Technologies in Non-Destructive Testing V

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Ultrasonic non-destructive testing is a well known technique in present days, in which the Cscan is the most wide spread. Though, because of the inherent limitations of most methods to quantitatively characterize (damaged) composite materials, the quest for more sophisticated methods is put forward. This study reports experimentally registered polar scans using an in house developed ultrasonic test setup for some typical composite materials. Both pulsed and harmonic ultrasonic beams are considered, which impinge onto the immersed anisotropic layer under investigation. Numerical computations are shown and compared with the experimental results. The experimental polar scan of a carbon fabric/PPS laminate with an artificially added delamination shows a drastic change in the observed patterns, compared to the one of the undamaged carbon fabric/PPS laminate. Combined with the sensitivity to the local stiffness tensor, a polar scan can become a great tool to quantitatively evaluate (damaged) composite materials.

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Simulations of harmonic and pulsed ultrasonic polar scans

Cited by 16 publications

References 39 publications

The Ultrasonic Polar Scan for Composite Characterization and Damage Assessment: Past, Present and Future

The Ultrasonic Polar Scan for Composite Characterization and Damage Assessment: Past, Present and Future

Recent Advances in the Ultrasonic Polar Scan Method for Characterizing (Degraded) Fiber Reinforced Plastics

Experimental and numerical polar scans of several anisotropic materials using pulsed and harmonic ultrasonic beams

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