Pitfalls in the experimental recording of ultrasonic (backscatter) polar scans for material characterization

Kersemans, Mathias; Paepegem, Wim Van; Abeele, Koen Van Den; Pyl, Lincy; Zastavnik, Filip; Sol, Hugo; Degrieck, Joris

doi:10.1016/j.ultras.2014.04.013

Cited by 13 publications

(17 citation statements)

References 21 publications

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“…The USIP40 (General Electric, Hurm (Efferen), Germany), with a sampling clock of 400 MHz, is used as pulser/receiver apparatus. With this setup, we identified several pitfalls in the earlier experimental procedures, which prevented the correct and accurate recording of an ultrasonic polar scan [14]. The high quality of our experiments can already be seen in Figure 1b,c, showing P-UPS recordings for aluminum and [0˝] 8 C/E laminate.…”

Section: The Ultrasonic Polar Scan Revisitedmentioning

confidence: 96%

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: The Ultrasonic Polar Scan Revisitedmentioning

confidence: 96%

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

et al. 2016

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“…In this way, we obtain high-quality experiments which has led to the identification of several experimental pitfalls which basically prevented the further advancement of the UPS research [8]. The exceptional quality of our experimental recordings may be seen in Secondly, we implemented a simulation technique to support experimental observations [9].…”

Section: Revisiting the Ultrasonic Polar Scanmentioning

confidence: 99%

“…By recording the transmission (or reflection) pulse amplitudes and mapping them in polar coordinates, a P-UPS image is obtained. Figure 1b shows a state-of-the-art P-UPS recording for a unidirectional [0°] 8 carbon/epoxy (C/E) laminate. The vertical incident angle θ is put on the radial axis, the in-plane polar angle φ is represented along the angular axis, while the assigned color pigment is a measure for the transmitted (or reflected) pulse amplitude.…”

Section: Introductionmentioning

confidence: 99%

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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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“…However, due to many technological subtleties the technique never reached its full potential. In recent years, most of the existing the pitfalls [1] were resolved and consequently the first applications of the UPS were investigated (e.g. study of fibre misalignment, layering, delaminations, fibre breakage, disbonding, corrosion, strain measurements, etc.).…”

Section: Introductionmentioning

confidence: 99%

Time-Of-Flight recorded Pulsed Ultrasonic Polar Scan for elasticity characterization of composites

Martens¹,

Kersemans²,

Degrieck³

et al. 2015

Emerging Technologies in Non-Destructive Testing VI

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In its orginal configuration, the pulsed ultasonic polarscan (P-UPS) mainly focussed on elastic material characterization through the inversion of amplitude landscape measurements. However, for several materials, special attention is required as minima in the transmission amplitudes do not exactly coincide with critical angles calculated from the Christoffel equations. Consequently, other means to extract the information on elastic moduli from P-UPS measurements are being investigated. In the present paper, we report on the use of time-of-flight ultrasonic polarscan (TOF-UPS) simulations as a new means of material characterization. Previous TOF inversions, although successful, were based on bulk wave approximations, which are not longer valid for thin materials. Our first inversion results on numerical cases demonstrate the usefulness of the new developed technique and highlight the added value compared to the bulk wave approximation 1 INTRODUCTION

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Pitfalls in the experimental recording of ultrasonic (backscatter) polar scans for material characterization

Cited by 13 publications

References 21 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

Time-Of-Flight recorded Pulsed Ultrasonic Polar Scan for elasticity characterization of composites

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