Ultrasonic non-destructive testing of complex titanium/carbon fibre composite joints

Jasiūnienė, Elena; Mažeika, Liudas; Samaitis, Vykintas; Cicėnas, Vaidotas; Mattsson, David

doi:10.1016/j.ultras.2019.02.009

Cited by 66 publications

(24 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The matrix material was a standard Epoxy resin. The volumetric density of the material was 1.14 g/cm 3 , while its compression and tensile modulus were 3.2 GPa and 3.0 GPa, respectively, measured at a temperature of 23 °C. The total thickness of the sample was 60 mm, with known standard defects, which were basically a series of side drilled holes.…”

Section: Resultsmentioning

confidence: 99%

“…Ultrasonic testing (UT) is the most widespread non-destructive testing (NDT) technique for the assessment of the structural integrity of highly attenuating and scattering materials, such as carbon fiber reinforced polymers (CFRP), both during manufacturing and in service [1,2]. However, the multi-layered structure of the material poses a challenge for the sensitivity and resolution of the testing system, especially when the sample is thick and/or it has complex geometry [3]. The signal-to-noise ratio (SNR) achievable for the echo signal of a defect or the backwall is strongly limited by the multiple reflections due to the ply interfaces, a fact that limits the minimum detectable defect size.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultrasonic Imaging of Thick Carbon Fiber Reinforced Polymers through Pulse-Compression-Based Phased Array

et al. 2021

View full text Add to dashboard Cite

The use of pulse-compression in ultrasonic non-destructive testing has assured, in various applications, a significant improvement in the signal-to-noise ratio. In this work, the technique is combined with linear phased array to improve the sensitivity and resolution in the ultrasonic imaging of highly attenuating and scattering materials. A series of tests were conducted on a 60 mm thick carbon fiber reinforced polymer benchmark sample with known defects using a custom-made pulse-compression-based phased array system. Sector scan and total focusing method images of the sample were obtained with the developed system and were compared with those reconstructed by using a commercial pulse-echo phased array system. While an almost identical sensitivity was found in the near field, the pulse-compression-based system surpassed the standard one in the far-field producing a more accurate imaging of the deepest defects and of the backwall of the sample.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrasonic Imaging of Thick Carbon Fiber Reinforced Polymers through Pulse-Compression-Based Phased Array

et al. 2021

View full text Add to dashboard Cite

show abstract

“…There are several techniques in application, including continuous wave (CW) imaging (single frequency or swept frequency excitation and single point or matrix detection) or time-domain spectroscopy (TDS) with femtosecond order pulsed excitation and detection using photoconductive antennas. The first setup enables higher power (and in consequence testing of thicker and more lossy structures) and faster inspection, while TDS enables spectroscopic information about an examined structure (dispersion curves and absorption peaks for specified frequencies correlated with specific molecules) [ 7 , 8 , 9 ] and relatively intuitive information about cross-section (in depth profile) because of operating principle similar to radar [ 10 , 11 , 12 , 25 ]. The excitation pulse is directed into the examined material and after interaction (reflection of interfaces having various dielectric properties) is picked up by a receiving antenna.…”

Section: Methodsmentioning

confidence: 99%

“…Ultrasonic testing of adhesive joints has been conducted for many years. These are mainly tests of steel–adhesive bonds [ 22 ], aluminum–adhesive bonds [ 23 ] and adhesive joints of composite materials [ 24 , 25 ]. Such kinds of research include defect searching in adhesive bonds.…”

Section: Introductionmentioning

confidence: 99%

Glass–Adhesive–Steel Joint Inspection Using Mechanic and High Frequency Electromagnetic Waves

et al. 2020

View full text Add to dashboard Cite

The utilization of a glass–adhesive–steel joint in modern machine and vehicle production is constantly growing. Despite the technological regime during the production process, various defects in the adhesive joints may occur. One of the major problems is lack of adhesive between joined materials. Due to the widespread use of non-transparent layers increasing adhesion, it is frequently not possible to conduct simple visual inspections. Hence, it is important to develop a non-destructive adhesive path continuity examination procedure. In that process, the different physical properties of the joint materials must be taken into account. Therefore, in this paper various testing methods were used, including ultrasound, thermographic and electromagnetic methods operating in the microwave and terahertz frequency range. Different physical phenomena of the methods allowed for examination of the joint in a wide context. In order to verify the information brought by each method, the results were transferred into common coordinate space, compared and finally integrated. Various opinion pooling strategies were conducted to fuse data, which allowed us to emphasize convergent and complementary information on adhesive continuity. The obtained results are promising and constitute the basis for further work on an integrated system for automatic evaluation of a wide range of possible defects in glass–adhesive–steel joints.

show abstract

“…Ultrasonic NDT had been used to investigate the adhesive bond quality with adherend integrity and interface quality evaluation, including disbond detection [ 4 , 5 , 6 , 7 , 8 , 9 ]. In addition, investigations to detect weak and kissing bonds have been performed in various studies [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Bonding Quality with Advanced Nondestructive Testing (NDT) and Data Fusion

Yılmaz

Jasiūnienė

et al. 2020

Sensors

View full text Add to dashboard Cite

This work aims to compare quantitatively different nondestructive testing (NDT) techniques and data fusion features for the evaluation of adhesive bonding quality. Adhesively bonded composite-epoxy single-lap joints have been investigated with advanced ultrasonic nondestructive testing and induction thermography. Bonded structures with artificial debonding defects in three different case studies have been investigated: debonding with release film inclusion, debonding with brass film-large, debonding with brass film-small. After completing preprocessing of the data for data fusion, the feature matrices, depending on the interface reflection peak-to-peak amplitude and the principal component analysis, have been extracted from ultrasonic and thermography inspection results, respectively. The obtained feature matrices have been used as the source in basic (average, difference, weighted average, Hadamard product) and statistical (Dempster–Shafer rule of combination) data fusion algorithms. The defect detection performances of advanced nondestructive testing techniques, in addition to data fusion algorithms have been evaluated quantitatively by receiver operating characteristics. In conclusion, it is shown that data fusion can increase the detectability of artificial debonding in single-lap joints.

show abstract

Ultrasonic non-destructive testing of complex titanium/carbon fibre composite joints

Cited by 66 publications

References 62 publications

Ultrasonic Imaging of Thick Carbon Fiber Reinforced Polymers through Pulse-Compression-Based Phased Array

Ultrasonic Imaging of Thick Carbon Fiber Reinforced Polymers through Pulse-Compression-Based Phased Array

Glass–Adhesive–Steel Joint Inspection Using Mechanic and High Frequency Electromagnetic Waves

Evaluation of Bonding Quality with Advanced Nondestructive Testing (NDT) and Data Fusion

Contact Info

Product

Resources

About