Ec Modelling and Enhancement Signals in CFRP Inspection

This paper presents an eddy current approach for testing, estimating, and classifying CFRP plate sub-surface defects, mainly due to delamination, through specific 2D magnetic induction field amplitude maps. These maps, showing marked fuzziness content, require the development of a procedure based on a fuzzy approach being efficiently classified. Since similar defects produce similar maps, we propose a method based on innovative fuzzy similarity formulations. This procedure can collect maps similar to each other in particular defect classes. In addition, a low-cost analysis system, including the probe, has been implemented in hardware. The developed tool can detect and evaluate the extent of surface defects with the same performance as a hardware tool of higher specifications, and it could be fruitfully employed by airline companies to maintain aircraft in compliance with safety standards.

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“…In this work, J e has been set point-by-point exploiting the direction cosine trigonometric formulation [36] J e,x = −…”

Section: Remarkmentioning

confidence: 99%

A Fuzzy Similarity-Based Approach to Classify Numerically Simulated and Experimentally Detected Carbon Fiber-Reinforced Polymer Plate Defects

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Angiulli

Crucitti

et al. 2022

Sensors

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“…Megali G. et al used COMSOL Multiphysics software based on the A-ϕ method to perform electromagnetic eddy current simulation analysis. The model unit was divided into tetrahedral mesh elements, and the CFRP plate was equivalent to a continuous anisotropic material [18]. When using eddy current coils to study the damage of CFRP, the establishment of its electromechanical coupling model becomes very important.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical-Mode Coupling Model and Failure Prediction of CFRP under Three-Point Bending

2021

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Carbon fiber reinforced polymer materials (CFRP) cause CFRP to bend or fail when subjected to external loads or impacts. In the case of static three-point bending, using the conductive properties of the carbon fiber inside the CFRP, the overall damage detection and failure prediction can be carried out by electromagnetic methods. The eddy current coil is used to realize real-time monitoring of damage, and the measured voltage value can be mapped to obtain the load of the sample. This paper conducts theoretical analysis and experimental verification, and obtains the relationship between CFRP stress damage and spatial conductivity change, and proposes a CFRP electromechanical coupling model under quasistatic three-point bending. Combined with the theory of electrically ineffective length, the CFRP three-point bending electromechanical coupling model was revised. Experimental results prove that the revised model can describe the load-conductivity change trend of three-dimensional braided CFRP more accurately, which provides a theoretical basis for monitoring the structural health of CFRP through electromagnetic methods.

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“…Eddy current has great potential in industrial field. For instance, in nondestructive testing [13,14], in contrast to other methods, the application of eddy current imaging has the characteristics of thrift, simplicity, fast detection, high efficiency, realizing automation easily, etc. [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The Temperature Field Analysis of the Implantable Medical Device Based on Fluid-Solid Coupling Conjugated Heat Transfer

Yan¹,

Ling²,

Cai³

2019

PIER C

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When an implantable medical device is in radio energy transmission, due to eddy current effect, the temperature of the device will rise, causing a safety risk. In order to study the distribution law of its temperature field, this paper adopts the analysis method of electromagnetic-thermal-fluid-solid multi-physics coupling, and establishes a two-dimensional transient equivalent model of an implantable medical device radio energy transmission system, adopting the analysis method of the electromagneticthermal-fluid-solid multi-field full coupling. Among these, electromagnetic heat is applied as the heat source, considering the influence of factors, such as heat conduction and convection. By means of simulated calculation, this paper acquired one-dimensional, two-dimensional and three-dimensional images ,whose temperature and efficiency changed with frequency. Moreover, their distribution laws are also obtained. In order to verify the correctness of the simulation, this paper conducts infrared temperature measurement experiments to prove the rationality of the analysis through comparing the simulation results. The research findings of this paper can provide a basis for the design of a radio energy transmission system for an implantable medical device, improve the safety of implantable medical devices, and reduce the occurrence of medical accidents. Meanwhile, it has certain reference value to the clinical application of implantable medical devices.

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Ec Modelling and Enhancement Signals in CFRP Inspection

Cited by 11 publications

References 18 publications

A Fuzzy Similarity-Based Approach to Classify Numerically Simulated and Experimentally Detected Carbon Fiber-Reinforced Polymer Plate Defects

A Fuzzy Similarity-Based Approach to Classify Numerically Simulated and Experimentally Detected Carbon Fiber-Reinforced Polymer Plate Defects

Electromechanical-Mode Coupling Model and Failure Prediction of CFRP under Three-Point Bending

The Temperature Field Analysis of the Implantable Medical Device Based on Fluid-Solid Coupling Conjugated Heat Transfer

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