Automatic ultrasonic inspection for internal defect detection in composite materials

D’Orazio, Tiziana; Leo, Marco; Distante, A.; Guaragnella, Cataldo; Pianese, Vittoria; Cavaccini, Giovanni

doi:10.1016/j.ndteint.2007.08.001

Cited by 110 publications

(42 citation statements)

References 7 publications

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“…The method makes it possible to track the progression of inward cracks. The accuracy depends on the transducer frequency and the minor crack size can be estimated by using Equation 3 [12][13][14][15] .…”

Section: Introductionmentioning

confidence: 99%

“…In order to evaluate a real application of composite materials in aircraft components, the thermal cycling was used as a common manner to simulate real aircraft operational conditions 15 . Regardless of the aim of this research, the standard MIL-HDBK-17-1F [16] was taken into account to test the laminate under a temperature envelop, requested by aircraft development programs.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of cumulative damage by using ultrasonic C-scan on carbon fiber/epoxy composites under thermal cycling

Shiino¹,

Faria²,

Botelho³

et al. 2012

Mat. Res.

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In recent years, structural composites manufactured by carbon fiber/epoxy laminates have been employed in large scale in aircraft industries. These structures require high strength under severe temperature changes of -56° until 80 °C. Regarding this scenario, the aim of this research was to reproduce thermal stress in the laminate plate developed by temperature changes and tracking possible cumulative damages on the laminate using ultrasonic C-scan inspection. The evaluation was based on attenuation signals and the C-scan map of the composite plate. The carbon fiber/epoxy plain weave laminate underwent temperatures of -60° to 80 °C, kept during 10 minutes and repeated for 1000, 2000, 3000 and 4000 times. After 1000 cycles, the specimens were inspected by C-scanning. A few changes in the laminate were observed using the inspection methodology only in specimens cycled 3000 times, or so. According to the found results, the used temperature range did not present enough conditions to cumulative damage in this type of laminate, which is in agreement with the macro -and micromechanical theory.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of cumulative damage by using ultrasonic C-scan on carbon fiber/epoxy composites under thermal cycling

Shiino¹,

Faria²,

Botelho³

et al. 2012

Mat. Res.

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show abstract

“…The need for continuous quality control increases the process time, which in turn results in higher costs, hence leading to the search for automated [12] or robotic solutions [13]. We were able to find solutions involving 2-axis [10], 3-and 4-axis dedicated robots and dedicated mobile robots for special non-destructive testing [14].…”

Section: Introductionmentioning

confidence: 99%

Robot-operated quality control station based on the UTT method

et al. 2017

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This paper presents a robotic test stand for the ultrasonic transmission tomography (UTT) inspection of stator vane thickness. The article presents the method of the test stand design in Autodesk Robot Structural Analysis Professional 2013 software suite. The performance of the designed test stand solution was simulated in the RobotStudio software suite. The operating principle of the test stand measurement system is presented with a specific focus on the measurement strategy. The results of actual wall thickness measurements performed on stator vanes are presented.

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“…Typical NDT techniques which have been used to try and reconstruct signals and / or images of defects inside the metals and composite materials are visual optical inspection, radiography, magnet particle inspection, eddy current testing, ultrasonic testing, acoustic emission testing, microwave testing, etc. [1][2] The ultrasonic testing is based on the detection and the interpretation of the ultrasonic waves reflected by defects.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Flaw Detection in Composite Materials Using SSP-MPSD Algorithm

Benammar¹,

Drai²

2014

Journal of Electrical Engineering and Technology

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-Due to the inherent inhomogeneous and anisotropy nature of the composite materials, the detection of internal defects in these materials with non-destructive techniques is an important requirement both for quality checks during the production phase and in service inspection during maintenance operations. The estimation of the time-of-arrival (TOA) and/or time-of-flight (TOF) of the ultrasonic echoes is essential in ultrasonic non-destructive testing (NDT). In this paper, we used split-spectrum processing (SSP) combined with matching pursuit signal decomposition (MPSD) to develop a dedicated ultrasonic detection system. SSP algorithm is used for Signal-to-Noise Ratio (SNR) enhancement, and the MPSD algorithm is used to decompose backscattered signals into a linear expansion of chirplet echoes and estimate the chirplet parameters. Therefore, the combination of SSP and MPSD (SSP-MPSD) presents a powerful technique for ultrasonic NDT. The SSP algorithm is achieved by using Gaussian band pass filters. Then, MPSD algorithm uses the Maximum Likelihood Estimation. The good performance of the proposed method is experimentally verified using ultrasonic traces acquired from three specimens of carbon fibre reinforced polymer multi-layered composite materials (CFRP).

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Automatic ultrasonic inspection for internal defect detection in composite materials

Cited by 110 publications

References 7 publications

Assessment of cumulative damage by using ultrasonic C-scan on carbon fiber/epoxy composites under thermal cycling

Assessment of cumulative damage by using ultrasonic C-scan on carbon fiber/epoxy composites under thermal cycling

Robot-operated quality control station based on the UTT method

Ultrasonic Flaw Detection in Composite Materials Using SSP-MPSD Algorithm

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