Assessment of Damage Detection in Composite Structures Using 3D Vibrometry

Grigg, Stephen; Pearson, M. R.; Marks, Ryan; Featherston, Carol Ann; Pullin, Rhys

doi:10.1088/1742-6596/628/1/012101

Cited by 2 publications

(9 citation statements)

References 2 publications

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“…Comparing the two sets of results, the S0 mode appears to be mostly unaffected by the presence of the impact damage. This concurs with the findings of Grigg et al 53 . The A0 Lamb mode does appear however…”

Section: Khz Resultssupporting

confidence: 94%

“…Three transducer excitation frequencies of 100kHz, 200kHz and 300kHz were selected to investigate the sensitivity of different wavelengths to the presence of impact damage. Although 100kHz lies outside of the published operating resonance of the transducer it has shown to produce useful results in previous studies 53,57,58 . Due to the maximum sampling frequency of the vibrometer being 2.56MHz, frequencies above 300kHz were not considered due to insufficient temporal resolution A 150V, 5-cycle sine burst was generated by a Mistras Group Limited (MGL) WaveGen function generator software which was connected to MGL μdisp/NB-8 hardware.…”

Section: D Scanning Laser Vibrometry Setupmentioning

confidence: 98%

“…A study by Lee et al 6 Aside from the applied study of wind turbines, studies have been conducted using laser vibrometry to investigate Lamb wave interaction with impact damage in composites. A study by Grigg et al 53 investigated Lamb wave interaction with impact damage in a flat carbon fibre panel using 3D scanning laser vibrometry. The results showed little interaction of the S0 mode with the impact damage but a significant disruption to the propagation of the A0 mode.…”

Section: Laser Vibrometry Damage Detection Studiesmentioning

confidence: 99%

“…This is due to the random placement of the chopped fibres. In fibre composite materials the in-plane Lamb wave components are influenced by the fibre direction53 therefore inhomogeneity of the fibre directions will have a more significant influence the noise on the in-plane components than the outof-plane.The results from the 200kHz excitation identify a region of reduced cross-correlation coefficient surrounding the impact site. The region is larger than that of the 100kHz excitation and is similar to that observed in the out-of-plane results.…”

mentioning

confidence: 99%

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Damage detection in a composite wind turbine blade using 3D scanning laser vibrometry

Marks

Gillam

Clarke

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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As worldwide wind energy generation capacity grows, there is an increasing demand to ensure structural integrity of the turbine blades to maintain efficient and safe energy generation. Currently, traditional non-destructive testing methods and visual inspections are employed which require the turbine to be out-of-operation during the inspection periods, resulting in costly and lengthy downtime. This study experimentally investigates the potential for using Lamb waves to monitor the structural integrity of a composite wind turbine blade that has been subject to an impact representative of damage which occurs in service. 3D scanning laser vibrometry was used to measure Lamb waves excited at three different frequencies both prior to, and after, impact to identify settings for an optimal system. Signal processing techniques were applied to the datasets to successfully locate the damage and highlight regions on the structure where the Lamb wave was significantly influenced by the presence of the impact damage. Damage size resulting from the impact was found to correlate well with the laser vibrometry results. The study concluded that acousto-ultrasonic-based structural health monitoring systems have great potential for monitoring the structural integrity of wind turbine blades.

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Section: Khz Resultssupporting

confidence: 94%

Section: D Scanning Laser Vibrometry Setupmentioning

confidence: 98%

Section: Laser Vibrometry Damage Detection Studiesmentioning

confidence: 99%

mentioning

confidence: 99%

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Damage detection in a composite wind turbine blade using 3D scanning laser vibrometry

Marks

Gillam

Clarke

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The AU principle of damage detection has been applied to a variety of structures and materials in a range of work using lab-based equipment 12,[16][17][18][19][20][21][22][23][24][25][26] . Researchers such as Fu et al 27 The concept of the developed device is presented in Figure 2.…”

Section: Figure 1: Demonstration Of Au Principle (A) Au Inspection Onmentioning

confidence: 99%

Development of an automated assessment technology for detecting damage in body armour

Marks

Grigg

Crivelli

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Hard ballistic body armour plates are designed to withstand the impact of a bullet and protect the wearer, if this happens the armour is clearly damaged and so is retired from service. Mishandling, however, such as dropping the armour, may cause minor and difficult to detect damage which compromises the effectiveness of the plate. Current methods of inspection involve shipping the plates to a central location, performing a thorough inspection and returning them to service if uncompromised; this is costly and requires redundancy of equipment for when not in service. Acousto-Ultrasonics is a method of structural health monitoring in which ultrasonic waves are excited in a structure by a transducer and receivers record the response, any deviation from a baseline measurement give an indication of damage within the structure. Within this paper the development and testing of a novel handheld prototype device is presented, which gives a simple yes/no answer to if there is damage on the plate. This inspection is quick and easy to perform by unskilled personnel. Low profile sensors have been utilised combined with a novel flexible circuitry with built in memory, which does not compromise the effectiveness of the armour.

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Assessment of Damage Detection in Composite Structures Using 3D Vibrometry

Cited by 2 publications

References 2 publications

Damage detection in a composite wind turbine blade using 3D scanning laser vibrometry

Damage detection in a composite wind turbine blade using 3D scanning laser vibrometry

Development of an automated assessment technology for detecting damage in body armour

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