Impact induced delamination detection and quantification with guided wavefield analysis

Tian, Zhenhua; Leckey, Cara A. C.; Yu, Lingyu; Seebo, Jeffrey P.

doi:10.1117/12.2083358

Cited by 3 publications

(2 citation statements)

References 37 publications

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“…Many efforts have been achieved using guided wavefield data measured by a scanning laser Doppler vibrometer (SLDV) to detect and quantify the damage. The wavefield data can be further analyzed for quantifying damage through frequency-wavenumber analysis, wavefield amplitude profile, and wavenumber imaging methods (Michaels et al, 2011; Ruzzene, 2007; Tian et al, 2015). In this section, the guided waves propagating and interaction with delamination was studied numerically using multi-physics finite element (FE) simulation and experimentally using SLDV.…”

Section: Guided Waves–delamination Interaction: Numerical and Experimental Studiesmentioning

confidence: 99%

Numerical and experimental investigation of delaminations in a unidirectional composite plate using NDT and SHM techniques

Migot

Mei

Giurgiutiu

2020

Journal of Intelligent Material Systems and Structures

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In this paper, the non-destructive testing (NDT), structural health monitoring (SHM), and scanning laser Doppler vibrometer (SLDV) techniques were presented to quantify three simulated delaminations inserted at different depths of a unidirectional composite plate. First, the RollerFORM and Omniscan equipment were sufficiently used to identify the delaminations. Second, in conjunction with guided waves, the developed imaging method was successfully used to detect and quantify the interested delaminations. The tuning curves were determined experimentally to define the dominant Lamb wave modes of incident waves. Third, multi-physics three-dimensional finite element simulations of propagating and interacting Lamb waves with delaminations were implemented to extract the wavefield data for wavenumber analysis. The experimental part was conducted to validate the numerical results using SLDV. The effect of the delamination depth on the trapped waves generated over the delamination region was studied numerically and experimentally. The results showed that trapped waves could be affected by the delamination depth. Both numerical and experimental results demonstrated that the near surface delamination has strong trapped waves over the delamination region while the far surface delamination has weak trapped waves. The energy distribution maps of numerical and experimental wavefields data sufficiently quantified the interested delaminations. A good agreement was achieved between the numerical and experimental results.

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Section: Guided Waves–delamination Interaction: Numerical and Experimental Studiesmentioning

confidence: 99%

Numerical and experimental investigation of delaminations in a unidirectional composite plate using NDT and SHM techniques

Migot

Mei

Giurgiutiu

2020

Journal of Intelligent Material Systems and Structures

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“…Then, a short space FT is applied to generate a space-frequency-wavenumber representation ( , , ) S f x k , as [11,17,18,51,52]:…”

Section: Wavenumber Nalysis For Amage Uantificationmentioning

confidence: 99%

Multi-site delamination detection and quantification in composites through guided wave based global-local sensing

Tian¹,

Leckey²,

Yu³

2017

AIP Conference Proceedings

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Abstract. This paper presents a guided wave based global-local sensing method for rapid detection and quantification of multi-site delamination damage in large composite panels. The global-local approach uses a hybrid system consisting of a piezoelectric transducer (PZT) for generating guided waves and a non-contact scanning laser Doppler vibrometer (SLDV) for acquiring guided wave data. The global-local method is performed in two steps. First, a phased array configured of a small number of SLDV scan points (for example 10×10 points in a rectangular grid array) performs inspection over the entire plate to detect and locate damage. Local areas are identified as potential damage regions for the second step. Then high density wavefield measurements are taken over the identified areas and wavefield analysis is performed to quantitatively evaluate the damage. For the proof of concept in case with multi-site damage, the global-local approach is demonstrated on a carbon fiber reinforced polymer (CFRP) composite plate with two sites of impact-induced delamination damage. In the first step, the locations of two delamination sites are detected by the phased array method. In the second step, the delamination size and shape are evaluated using wavefield analysis. The detected delamination location, size and shape agree well with those of ultrasonic C-scan and the method led to a 93% reduction in inspection time compared to a full SLDV dense grid scan.

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Novel quantitative sizing of delamination in hard-to-inspect locations

Nadarajah¹

2017

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Impact induced delamination detection and quantification with guided wavefield analysis

Cited by 3 publications

References 37 publications

Numerical and experimental investigation of delaminations in a unidirectional composite plate using NDT and SHM techniques

Numerical and experimental investigation of delaminations in a unidirectional composite plate using NDT and SHM techniques

Multi-site delamination detection and quantification in composites through guided wave based global-local sensing

Novel quantitative sizing of delamination in hard-to-inspect locations

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