Hybrid ray-FDTD model for the simulation of the ultrasonic inspection of CFRP parts

Jezzine, K.; Ségur, Damien; Ecault, Romain; Domínguez, N.; Calmon, Pierre

doi:10.1063/1.4974660

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…where u m and σ m are the displacement and stress matrices for layer m, A m± are the amplitudes of the upward traveling waves in layer m, h m is the thickness of the layer m, F is the matrix consisting of force vectors f ± of the three propagating modes of the wave in Equation ( 7), D is a matrix consisting of the polarization vectors as shown in Equation ( 8), and H is a diagonal matrix in which the propagators are distributed along the diagonal with the other elements of matrix being zero, as shown in Equation (9).…”

Section: Transfer and Stiffness Matrix Methods For Multilayer Wave Propagationmentioning

confidence: 99%

“…A variety of approaches to simulate the array signals from multilayered materials have been reported in the literature. These approaches include applying ray methods to a homogenized layered structure [ 8 ], using hybrid ray–finite difference time domain (FDTD) methods [ 9 ], multi-Gaussian beams [ 10 , 11 ], or using plane wave models to calculate the reflection or transmission of the waves in the bounding media [ 12 , 13 , 14 , 15 ]. These approaches are either computationally expensive when used for layered materials, singular when interacting with curved interfaces, or do not reflect the real-world situation of bounded beams.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Imaging of Ultrasonic Array Inspection of Side Drilled Holes in Layered Anisotropic Media

Anand

Groves

Benedictus

2021

Sensors

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There has been an increase in the use of ultrasonic arrays for the detection of defects in composite structures used in the aerospace industry. The response of a defect embedded in such a medium is influenced by the inherent anisotropy of the bounding medium and the layering of the bounding medium and hence poses challenges for the interpretation of the full matrix capture (FMC) results. Modeling techniques can be used to understand and simulate the effect of the structure and the defect on the received signals. Existing modeling techniques, such as finite element methods (FEM), finite difference time domain (FDTD), and analytical solutions, are computationally inefficient or are singularly used for structures with complex geometries. In this paper, we develop a novel model based on the Gaussian-based recursive stiffness matrix approach to model the scattering from a side-drilled hole embedded in an anisotropic layered medium. The paper provides a novel method to calculate the transmission and reflection coefficients of plane waves traveling from a layered anisotropic medium into a semi-infinite anisotropic medium by combining the transfer matrix and stiffness matrix methods. The novelty of the paper is the developed model using Gaussian beams to simulate the scattering from a Side Drilled Hole (SDH) embedded in a multilayered composite laminate, which can be used in both immersion and contact setups. We describe a method to combine the scattering from defects with the model to simulate the response of a layered structure and to simulate the full matrix capture (FMC) signals that are received from an SDH embedded in a layered medium. The model-assisted correction total focusing method (MAC-TFM) imaging is used to image both the simulated and experimental results. The proposed method has been validated for both isotropic and anisotropic media by a qualitative and quantitative comparison with experimentally determined signals. The method proposed in this paper is modular, computationally inexpensive, and is in good agreement with experimentally determined signals, and it enables us to understand the effects of various parameters on the scattering of a defect embedded in a layered anisotropic medium.

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Section: Transfer and Stiffness Matrix Methods For Multilayer Wave Propagationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Imaging of Ultrasonic Array Inspection of Side Drilled Holes in Layered Anisotropic Media

Anand

Groves

Benedictus

2021

Sensors

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“…A promising option in CIVA 2016, called CIVA FIDEL 2D, can address this need for improved accuracy while maintaining reasonable simulation time in modeling the incident field and scattering from defects in composite inspections. CIVA FIDEL incorporates a hybrid approach using semi-analytical models for ultrasonic transmit and receiver transducers in conjunction with a 2D finite difference time domain (FDTD) solution for modeling the local interaction and scattering from multilayer composites with discontinuities [11][12]. A screen shot of the CIVA FIDEL software interface is presented in Fig.…”

Section: Modelmentioning

confidence: 99%

“…As well, CIVA FIDEL provides some very useful features for reviewing the simulated results; it is feasible to view the peak response in the specimen domain, and step through the transient response using 2D image views. More information on the formulation and applications of CIVA FIDEL can be found in references [11][12].…”

Section: Modelmentioning

confidence: 99%

Fundamentals of angled-beam ultrasonic NDE for potential characterization of hidden regions of impact damage in composites

Aldrin¹,

Wertz

Welter

et al. 2018

AIP Conference Proceedings

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In this study, the use of angled-beam ultrasonic NDE was explored for the potential characterization of the hidden regions of impact damage in composites. Simulated studies using CIVA FIDEL 2D were used to explore this inspection problem. Quasi-shear (qS) modes can be generated over a wide range of angles and used to reflect off the backwall and interrogate under the top delaminations of impact damage. Secondary probe signals that do propagate normal to the surface were found to be significant under certain probe conditions, and can potentially interfere with weakly scattered signals from within the composite panel. Simulations were used to evaluate the source of the multiple paths of reflections from the edge of a delamination, whose time-of-flight and amplitude will depend on the depth of the delamination and location of neighboring delaminations. For angled-beam inspections, noise from both the top surface roughness and internal features was found to potentially mask the detection of signals from the edge of delaminations. Lastly, the potential of generating 'guided' waves along the backwall using an angled-beam source and subsequently measuring scattered signals from a far surface crack hidden under a delamination was explored.

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A dual-scale morphological filtering method for composite damage identification using FBP

Luo

Chen

Liang

et al. 2023

Mechanical Systems and Signal Processing

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Hybrid ray-FDTD model for the simulation of the ultrasonic inspection of CFRP parts

Cited by 7 publications

References 7 publications

Modeling and Imaging of Ultrasonic Array Inspection of Side Drilled Holes in Layered Anisotropic Media

Modeling and Imaging of Ultrasonic Array Inspection of Side Drilled Holes in Layered Anisotropic Media

Fundamentals of angled-beam ultrasonic NDE for potential characterization of hidden regions of impact damage in composites

A dual-scale morphological filtering method for composite damage identification using FBP

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