Microcrack inspection in a functionally graded plate structure using nonlinear guided waves

Aslam, Mohammed; Park, Junpil; Lee, Jaesun

doi:10.1016/j.istruc.2023.01.144

Cited by 10 publications

(2 citation statements)

References 60 publications

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“…The experimental findings were further validated through finite element simulation [ 19 , 20 ]. Furthermore, there is an active research effort among many scholars to diagnose micro-damage through the utilization of second and third harmonics [ 21 , 22 , 23 ]. Additionally, researchers are exploring methods to enhance sensitivity by mitigating system nonlinearity [ 24 ], as well as investigating the effects of thermal aging on sensitivity [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Nonlinearity Experiment due to Plastic Deformation of Aluminum Plate Due to Bending Damage

2023

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The nonlinear ultrasonic evaluation technique is useful for assessing micro-defects and microstructure changes caused by fatigue or bending damage. In particular, the guided wave is advantageous for long-distance testing such as piping and plate. Despite these advantages, the study of nonlinear guided wave propagation has received relatively less attention compared to bulk wave techniques. Furthermore, there is a lack of research on the correlation between nonlinear parameters and material properties. In this study, the relationship between nonlinear parameters and plastic deformation resulting from bending damage was experimentally investigated using Lamb waves. The findings indicated an increase in the nonlinear parameter for the specimen, which was loaded within the elastic limit. Inversely, regions of maximum deflection in specimens with plastic deformation exhibited a decrease in the nonlinear parameter. This research is expected to be helpful for maintenance technology in the nuclear power plant and aerospace fields that require high reliability and accuracy.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic Nonlinearity Experiment due to Plastic Deformation of Aluminum Plate Due to Bending Damage

2023

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“…Numerous techniques have been developed to address the issue of damage detection in FGM structures. One approach is to use non-destructive testing (NDT) methods, such as ultrasonic testing [8][9][10], eddy current tomography [11][12][13][14][15], and X-ray computed tomography (CT) [16]. These methods can detect damage by analyzing changes in the properties of the material, such as changes in acoustic properties or changes in magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Novel Approach-Based Sparsity for Damage Localization in Functionally Graded Material

et al. 2023

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Model-based approaches have been widely employed in damage detection and localization studies. However, alternative techniques, such as built-in online detection methods, hold promise for future advancements in structural health monitoring technologies. In this research paper, we present a dynamic algorithm specifically designed for accurate damage localization in functionally graded plates. The suggested method involves the creation of a grid matrix that captures the dynamic response of the structure over time. Subsequently, an optimization process is performed using a linear equation that incorporates the information contained within the grid, enabling the precise localization of damage. To address the inherent sparsity of the localization nature, we utilize the FISTA (fast iterative shrinkage-thresholding algorithm) as a problem solver. The effectiveness of our approach is evaluated through experimental tests on a functionally graded plate with clamped free boundary conditions. Multiple damage scenarios are investigated, including cases with damage signals on and off-the-grid. The results demonstrate that our proposed approach is capable of accurately predicting the position of damage, indicating its suitability for application in low-size data systems.

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A comprehensive study on guided wave dispersion in complex structures

Aslam,

Park,

Lee

2024

International Journal of Mechanical Sciences

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Microcrack inspection in a functionally graded plate structure using nonlinear guided waves

Cited by 10 publications

References 60 publications

Ultrasonic Nonlinearity Experiment due to Plastic Deformation of Aluminum Plate Due to Bending Damage

Ultrasonic Nonlinearity Experiment due to Plastic Deformation of Aluminum Plate Due to Bending Damage

Novel Approach-Based Sparsity for Damage Localization in Functionally Graded Material

A comprehensive study on guided wave dispersion in complex structures

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