High-speed infrared thermography for in-situ damage monitoring during impact test

Wang, Ziyang; Chaibi, Salim; Portemont, Gérald; Paulmier, P.; Laurin, Frédéric

doi:10.1016/j.compstruct.2023.116934

Cited by 9 publications

(2 citation statements)

References 33 publications

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“…These inhomogeneities can be caused by embedded elements, which are known in advance, and by defects that need to be detected. Halogen and xenon lamps, lasers, a flow of hot air or liquid, and thermoacoustic emission and dissipation of mechanical energy during friction or impact are used as a source of thermal influence [10][11][12]. Additionally, there are known the methods involving the direct cooling of the tested product surface [13].…”

Section: Introductionmentioning

confidence: 99%

Using Laser Point Scanning Thermography for Quality Monitoring of Products Made of Composite Materials

Divin,

Karpov,

Zakharov

et al. 2024

Engineering Technologies and Systems

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Introduction. Control of the presence of subsurface defects in products from composite materials is necessary for verification of products after release from production and in the process of operation. Aim of the Study. The purpose of the presented work is to estimate the parameters of subsurface defects using local laser thermography, suitable for quality control of both small objects and suspicious areas of large objects with curved surfaces. Materials and Methods. The laboratory setup on which this work was carried out includes a robotic arm, a COX CG640 thermal imager and a 3 W laser. The method was tested on a fiberglass sample with introduced delamination defect simulations located at different depths below the surface. By means of computer modeling rational parameters of thermographic control were selected, providing reliable detection of the defect at a depth of up to 3 mm under the surface of the composite sample. Results. Numerical modeling of surface temperature field induced by moving focused laser beam was carried out using COMSOL software package. It showed that laser beam with 3 W power moving at 5 mm/s provided the thermal contrast sufficient to detect the defects at the depth up to 3 mm. The obtained experimental data are in satisfactory agreement with numerical modeling both qualitatively and quantitatively. Experimental data were used to construct a regression model for determining defect depth based on the maximal thermal contrast and the time interval between heating and the contrast maximum. Discussion and Conclusion. The results obtained in this work allow us to propose a technique for detecting defects in fiberglass plastics and estimating their depth. The coefficient of determination for the obtained regression model was found to be equal to 0.95, and the mean square error of the metric was no more than 0.016 mm2. The use of a robotic arm to scan objects will make it possible to investigate objects with complex curved surfaces.

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Section: Introductionmentioning

confidence: 99%

Using Laser Point Scanning Thermography for Quality Monitoring of Products Made of Composite Materials

Divin,

Karpov,

Zakharov

et al. 2024

Engineering Technologies and Systems

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“…Wang et al (2023) used the acoustic emission method to observe the failure process of cemented asphalt filling mixes under different loads. Berthe et al (2023) used high-speed infrared thermal imaging technology to observe materials under low-velocity impact and estimate the degree of damage. Every method has its advantages and limitations.…”

Section: Introductionmentioning

confidence: 99%

Analysis and quantitative identification of guided wave propagation mechanism in concrete

Su,

Zhang,

Tang

et al. 2023

Front. Earth Sci.

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Concrete is widely used in bridges, tunnels, nuclear power plants and other buildings, the damage of concrete will bring significant safety hazards for the building, therefore, detecting concrete damage is of great significance. In this paper, the propagation characteristics of guided waves in concrete plates are investigated, and finite element simulation is used to analyze the sensitivity of guided waves to the damage of concrete materials under different excitation frequencies. Simulation experiments on guided wave propagation are performed on concrete materials containing damage in the excitation frequency range from 25 to 100 kHz. The signals received by the sensors are analyzed in the time domain, while the reflected wave signals resulting from the contact of the signals with the damage are analyzed in the frequency domain. The results show that the excitation frequencies of 25 and 60 kHz are more sensitive to damage, and the quantitative identification of damage without reference can be realized by using the peak signals in the frequency domain at different excitation frequencies.

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Characterization of early fatigue damage in CFRP unidirectional laminates based on Micro‐CT

Tianyu,

Zhiming,

et al. 2024

Polymer Composites

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Fatigue damages of Carbon Fiber Reinforced Polymer (CFRP) laminates are not obvious. Obtaining the evolution of the internal fatigue damage in CFRP laminates before visible cracks occur is of vital importance for ensuring structural reliability. Micro X‐ray computed tomography (Micro‐CT) can provide micron scale nondestructive imaging of internal structure of materials. In this paper, a preliminary study was conducted on the early fatigue damage evolution of 0° UD laminates. Axial tension‐tension fatigue tests of [0]16 CFRP laminates were carried out, and the evolutionary behavior of damages was confirmed by fatigue dissipated energy. Then, the internal damages of fatigued specimens were observed and reconstructed using Micro‐CT, and statistical parameters such as damage sphericity, length and angle were calculated. The spatial distribution characteristics of cracks were further acquired by surface porosity and frequency distribution of damage positions in ROI. Early damages from tensile‐tensile fatigue in 0° UD laminates extend along the fiber direction with original defects in the interlayer resin enrichment areas as the nucleus, and tend to concentrate near the width edge of the specimens. Finally, a “sandwich” structural model was developed to analyze the internal stresses of laminates under the influence of interlayer resin enrichment. The FEA results revealed that the internal stresses σy and σz concentrate near the width edges of the specimen, resulting in cracks tend to evolve more in the regions close to edges.Highlights Imaging matrix cracks of specimens by Micro‐CT at 12.91 μm voxel size. Demonstrating evolution patterns of cracks with its morphology statistics. Revealing crack distributions in ROIs with variations of surface porosity. Analyzing internal stress distribution by “sandwich” model created from reality.

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High-speed infrared thermography for in-situ damage monitoring during impact test

Cited by 9 publications

References 33 publications

Using Laser Point Scanning Thermography for Quality Monitoring of Products Made of Composite Materials

Using Laser Point Scanning Thermography for Quality Monitoring of Products Made of Composite Materials

Analysis and quantitative identification of guided wave propagation mechanism in concrete

Characterization of early fatigue damage in CFRP unidirectional laminates based on Micro‐CT

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