The Experts below are selected from a list of 7116 Experts worldwide ranked by ideXlab platform
Aditi Chattopadhyay - One of the best experts on this subject based on the ideXlab platform.
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ultrasonic Guided Wave Propagation in composites including damage using high fidelity local interaction simulation
Journal of Intelligent Material Systems and Structures, 2017Co-Authors: Rajesh Kumar Neerukatti, Aditi ChattopadhyayAbstract:Composite materials are used in many advanced engineering applications because of high specific strength and stiffness. Their complex damage mechanisms and failure modes, however, are still not wel...
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fully coupled electromechanical elastodynamic model for Guided Wave Propagation analysis
Proceedings of SPIE, 2013Co-Authors: Luke Borkowski, Kuang C Liu, Aditi ChattopadhyayAbstract:Physics-based computational models play a key role in the study of Wave Propagation for structural health monitoring (SHM) and the development of improved damage detection methodologies. Due to the complex nature of Guided Waves (GWs), accurate and efficient computation tools are necessary to investigate the mechanisms responsible for dispersion, coupling, and interaction with damage. In this paper, a fully coupled electromechanical elastodynamic model for Wave Propagation in a heterogeneous, anisotropic material system is developed. The final framework provides the full three dimensional displacement and electrical potential fields for arbitrary plate and transducer geometries and excitation Waveform and frequency. The model is validated theoretically and proven computationally efficient. Studies are performed with surface bonded piezoelectric sensors to gain insight into the physics of experimental techniques used for SHM. Collocated actuation of the fundamental Lamb Wave modes is modeled over a range of frequencies to demonstrate mode tuning capabilities. The effect of various actuation types commonly used in numerical Wave Propagation models on Lamb Wave speed are studied and compared. Since many studies, including the ones investigated in this paper, are difficult to perform experimentally, the developed model provides a valuable tool for the improvement of SHM techniques.
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fully coupled electromechanical elastodynamic model for Guided Wave Propagation analysis
Journal of Intelligent Material Systems and Structures, 2013Co-Authors: Luke Borkowski, Kuang C Liu, Aditi ChattopadhyayAbstract:Physics-based computational models play a key role in the study of Wave Propagation for structural health monitoring and the development of improved damage detection methodologies. Due to the complex nature of Guided Waves, accurate and efficient computation tools are necessary to investigate the mechanisms responsible for dispersion, coupling, and interaction with damage. In this article, a fully coupled electromechanical elastodynamic model for Wave Propagation in a heterogeneous, anisotropic material system is developed. The final framework provides the full three-dimensional displacement and electrical potential fields for arbitrary plate and transducer geometries and excitation Waveform and frequency. The model is validated theoretically and proven computationally efficient. Studies are performed with surface-bonded piezoelectric sensors to gain insight into the physics of experimental techniques used for structural health monitoring. Collocated actuation of the fundamental Lamb Wave modes is modeled...
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fully coupled electromechanical elastodynamic model for Guided Wave Propagation analysis
arXiv: Classical Physics, 2013Co-Authors: Luke Borkowski, Kuang C Liu, Aditi ChattopadhyayAbstract:Physics-based computational models play a key role in the study of Wave Propagation for structural health monitoring (SHM) and the development of improved damage detection methodologies. Due to the complex nature of Guided Waves, accurate and efficient computation tools are necessary to investigate the mechanisms responsible for dispersion, coupling, and interaction with damage. In this paper, a fully coupled electromechanical elastodynamic model for Wave Propagation in a heterogeneous, anisotropic material system is developed. The final framework provides the full three dimensional displacement and electrical potential fields for arbitrary plate and transducer geometries and excitation Waveform and frequency. The model is validated theoretically and proven computationally efficient. Studies are performed with surface bonded piezoelectric sensors to gain insight into the physics of experimental techniques used for SHM. Collocated actuation of the fundamental Lamb Wave modes is modeled over a range of frequencies to demonstrate mode tuning capabilities. The displacement of the sensing surface is compared to the piezoelectric sensor electric potential to investigate the relationship between plate displacement and sensor voltage output. Since many studies, including the ones investigated in this paper, are difficult to perform experimentally, the developed model provides a valuable tool for the improvement of SHM techniques.
Carlos E. S. Cesnik - One of the best experts on this subject based on the ideXlab platform.
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hybrid local fem global lisa modeling of damped Guided Wave Propagation in complex composite structures
Smart Materials and Structures, 2016Co-Authors: Yanfeng Shen, Carlos E. S. CesnikAbstract:This paper presents a new hybrid modeling technique for the efficient simulation of Guided Wave generation, Propagation, and interaction with damage in complex composite structures. A local finite element model is deployed to capture the piezoelectric effects and actuation dynamics of the transmitter, while the global domain Wave Propagation and interaction with structural complexity (structure features and damage) are solved utilizing a local interaction simulation approach (LISA). This hybrid approach allows the accurate modeling of the local dynamics of the transducers and keeping the LISA formulation in an explicit format, which facilitates its readiness for parallel computing. The global LISA framework was extended through the 3D Kelvin–Voigt viscoelasticity theory to include anisotropic damping effects for composite structures, as an improvement over the existing LISA formulation. The global LISA framework was implemented using the compute unified device architecture running on graphic processing units. A commercial preprocessor is integrated seamlessly with the computational framework for grid generation and material property allocation to handle complex structures. The excitability and damping effects are successfully captured by this hybrid model, with experimental validation using the scanning laser doppler vibrometry. To demonstrate the capability of our hybrid approach for complex structures, Guided Wave Propagation and interaction with a delamination in a composite panel with stiffeners is presented.
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hybrid local fem global lisa modeling of Guided Wave Propagation and interaction with damage in composite structures
Proceedings of SPIE, 2015Co-Authors: Yanfeng Shen, Carlos E. S. CesnikAbstract:This paper presents a hybrid modeling technique for the efficient simulation of Guided Wave Propagation and interaction with damage in composite structures. This hybrid approach uses a local finite element model (FEM) to compute the excitability of Guided Waves generated by piezoelectric transducers, while the global domain Wave Propagation, Wave-damage interaction, and boundary reflections are modeled with the local interaction simulation approach (LISA). A small-size multi-physics FEM with non-reflective boundaries (NRB) was built to obtain the excitability information of Guided Waves generated by the transmitter. Frequency-domain harmonic analysis was carried out to obtain the solution for all the frequencies of interest. Fourier and inverse Fourier transform and frequency domain convolution techniques are used to obtain the time domain 3-D displacement field underneath the transmitter under an arbitrary excitation. This 3-D displacement field is then fed into the highly efficient time domain LISA simulation module to compute Guided Wave Propagation, interaction with damage, and reflections at structural boundaries. The damping effect of composite materials was considered in the modified LISA formulation. The grids for complex structures were generated using commercial FEM preprocessors and converted to LISA connectivity format. Parallelization of the global LISA solution was achieved through Compute Unified Design Architecture (CUDA) running on Graphical Processing Unit (GPU). The multi-physics local FEM can reliably capture the detailed dimensions and local dynamics of the piezoelectric transducers. The global domain LISA can accurately solve the 3-D elastodynamic Wave equations in a highly efficient manner. By combining the local FEM with global LISA, the efficient and accurate simulation of Guided Wave structural health monitoring procedure is achieved. Two numerical case studies are presented: (1) Wave Propagation in a unidirectional CFRP composite plate; (2) Wave Propagation in a stiffened cross-ply CFRP plate with delamination.
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Simulation of Guided Wave Propagation in Isotropic and Composite Structures using LISA
53rd AIAA ASME ASCE AHS ASC Structures Structural Dynamics and Materials Conference<BR>20th AIAA ASME AHS Adaptive Structures Conference<BR&g, 2012Co-Authors: Kalyan S. Nadella, Carlos E. S. CesnikAbstract:This paper presents a local interaction simulation approach (LISA) numerical method to examine the Guided Wave Propagation in plate and sandwich structures. The method is based on recursive iterative equations, derived from the elastodynamic equilibrium equations. Derivation of the iterative equations with varying spatial discretizations is presented for a generalized orthotropic medium in non-principle axis frame. The new iterative equations have the capability to model generic laminated composite plates and sandwich composite structures. The results address some of the Propagation aspects in isotropic plates, laminated composite plates, and simple composite foam core sandwich.
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local interaction simulation of Guided Wave Propagation in composite plates
Proceedings of SPIE, 2011Co-Authors: Kalyan S. Nadella, Carlos E. S. CesnikAbstract:Composite structures are being extensively used in the modern industries because of their superior strength to weight ratio, high stiffness, and long fatigue life. The ability to tailor the material properties along different directions also increases the avenues of composites material application. The ever-increasing demand for composite structures and the need to ensure the structural integrity necessitates the development of sustainable and efficient structural health monitoring (SHM) systems. Guided Wave (GW) methods offer an attractive solution for SHM due to their tunable sensitivity to different defects and their ability to interrogate large structural surfaces. Because of the anisotropy present in the composite materials, the development of the SHM methods is significantly more complex and challenging than in the case of isotropic materials. This paper presents numerical simulations based on the local interaction simulation approach (LISA) to characterize the Propagation of GW in laminated composite plates.
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characterization of Guided Wave Propagation in composite plates
Proceedings of SPIE, 2010Co-Authors: Kalyan S. Nadella, Ken I Salas, Carlos E. S. CesnikAbstract:ABSTRACT The increasing use of composite materials in multiple engineering applications has emphasized the need for structural health monitoring (SHM) technologies capable of detecting, locating, and classifying structural defects in these materials. Guided Wave (GW) methods of fer an attractive solution for SHM due to their tunable sensitivity to different defects and their ability to interrogate large structural surfaces. The complications associated with the material anisotropy and directionality in composites result in an increased need for accurate and efficient simulation tools to characterize GW excitation and Propagation in these materials. This paper presents a theoretical model based on three-dimensional elasticity to characterize GW excitation by finite-dimensional transducers in composite laminates. The theory uses an eigenbasis expansion for a bulk transversely isotropic material combined with Fourier transforms, the global matrix approach, and residue theory to find the displacement field excited by an arbitrarily shaped finite-dimensional transducer. Experimental results obtained in a cross-ply composite laminate are used to assess the accuracy of the theoretical solution. Keywords: structural health monitoring (SHM), Guided Wave s (GW), transducer design, composite materials.
Luke Borkowski - One of the best experts on this subject based on the ideXlab platform.
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fully coupled electromechanical elastodynamic model for Guided Wave Propagation analysis
Proceedings of SPIE, 2013Co-Authors: Luke Borkowski, Kuang C Liu, Aditi ChattopadhyayAbstract:Physics-based computational models play a key role in the study of Wave Propagation for structural health monitoring (SHM) and the development of improved damage detection methodologies. Due to the complex nature of Guided Waves (GWs), accurate and efficient computation tools are necessary to investigate the mechanisms responsible for dispersion, coupling, and interaction with damage. In this paper, a fully coupled electromechanical elastodynamic model for Wave Propagation in a heterogeneous, anisotropic material system is developed. The final framework provides the full three dimensional displacement and electrical potential fields for arbitrary plate and transducer geometries and excitation Waveform and frequency. The model is validated theoretically and proven computationally efficient. Studies are performed with surface bonded piezoelectric sensors to gain insight into the physics of experimental techniques used for SHM. Collocated actuation of the fundamental Lamb Wave modes is modeled over a range of frequencies to demonstrate mode tuning capabilities. The effect of various actuation types commonly used in numerical Wave Propagation models on Lamb Wave speed are studied and compared. Since many studies, including the ones investigated in this paper, are difficult to perform experimentally, the developed model provides a valuable tool for the improvement of SHM techniques.
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fully coupled electromechanical elastodynamic model for Guided Wave Propagation analysis
Journal of Intelligent Material Systems and Structures, 2013Co-Authors: Luke Borkowski, Kuang C Liu, Aditi ChattopadhyayAbstract:Physics-based computational models play a key role in the study of Wave Propagation for structural health monitoring and the development of improved damage detection methodologies. Due to the complex nature of Guided Waves, accurate and efficient computation tools are necessary to investigate the mechanisms responsible for dispersion, coupling, and interaction with damage. In this article, a fully coupled electromechanical elastodynamic model for Wave Propagation in a heterogeneous, anisotropic material system is developed. The final framework provides the full three-dimensional displacement and electrical potential fields for arbitrary plate and transducer geometries and excitation Waveform and frequency. The model is validated theoretically and proven computationally efficient. Studies are performed with surface-bonded piezoelectric sensors to gain insight into the physics of experimental techniques used for structural health monitoring. Collocated actuation of the fundamental Lamb Wave modes is modeled...
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fully coupled electromechanical elastodynamic model for Guided Wave Propagation analysis
arXiv: Classical Physics, 2013Co-Authors: Luke Borkowski, Kuang C Liu, Aditi ChattopadhyayAbstract:Physics-based computational models play a key role in the study of Wave Propagation for structural health monitoring (SHM) and the development of improved damage detection methodologies. Due to the complex nature of Guided Waves, accurate and efficient computation tools are necessary to investigate the mechanisms responsible for dispersion, coupling, and interaction with damage. In this paper, a fully coupled electromechanical elastodynamic model for Wave Propagation in a heterogeneous, anisotropic material system is developed. The final framework provides the full three dimensional displacement and electrical potential fields for arbitrary plate and transducer geometries and excitation Waveform and frequency. The model is validated theoretically and proven computationally efficient. Studies are performed with surface bonded piezoelectric sensors to gain insight into the physics of experimental techniques used for SHM. Collocated actuation of the fundamental Lamb Wave modes is modeled over a range of frequencies to demonstrate mode tuning capabilities. The displacement of the sensing surface is compared to the piezoelectric sensor electric potential to investigate the relationship between plate displacement and sensor voltage output. Since many studies, including the ones investigated in this paper, are difficult to perform experimentally, the developed model provides a valuable tool for the improvement of SHM techniques.
Joseph L Rose - One of the best experts on this subject based on the ideXlab platform.
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ultrasonic Guided Wave Propagation across Waveguide transitions energy transfer and mode conversion
Journal of the Acoustical Society of America, 2013Co-Authors: Padmakumar Puthillath, Cliff J Lissenden, Jose M Galan, Joseph L RoseAbstract:Ultrasonic Guided Wave inspection of structures containing adhesively bonded joints requires an understanding of the interaction of Guided Waves with geometric and material discontinuities or transitions in the Waveguide. Such interactions result in mode conversion with energy being partitioned among the reflected and transmitted modes. The step transition between an aluminum layer and an aluminum-adhesive-aluminum multi-layer Waveguide is analyzed as a model structure. Dispersion analysis enables assessment of (i) synchronism through dispersion curve overlap and (ii) Wavestructure correlation. Mode-pairs in the multi-layer Waveguide are defined relative to a prescribed mode in a single layer as being synchronized and having nearly perfect Wavestructure matching. Only a limited number of mode-pairs exist, and each has a unique frequency range. A hybrid model based on semi-analytical finite elements and the normal mode expansion is implemented to assess mode conversion at a step transition in a Waveguide. ...
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ultrasonic Guided Wave Propagation across Waveguide transitions energy transfer and mode conversion
Journal of the Acoustical Society of America, 2013Co-Authors: Padmakumar Puthillath, Cliff J Lissenden, Jose M Galan, Baiyang Ren, Joseph L RoseAbstract:Ultrasonic Guided Wave inspection of structures containing adhesively bonded joints requires an understanding of the interaction of Guided Waves with geometric and material discontinuities or transitions in the Waveguide. Such interactions result in mode conversion with energy being partitioned among the reflected and transmitted modes. The step transition between an aluminum layer and an aluminum-adhesive-aluminum multi-layer Waveguide is analyzed as a model structure. Dispersion analysis enables assessment of (i) synchronism through dispersion curve overlap and (ii) Wavestructure correlation. Mode-pairs in the multi-layer Waveguide are defined relative to a prescribed mode in a single layer as being synchronized and having nearly perfect Wavestructure matching. Only a limited number of mode-pairs exist, and each has a unique frequency range. A hybrid model based on semi-analytical finite elements and the normal mode expansion is implemented to assess mode conversion at a step transition in a Waveguide. The model results indicate that synchronism and Wavestructure matching is associated with energy transfer through the step transition, and that the energy of an incident Wave mode in a single layer is transmitted almost entirely to the associated mode-pair, where one exists. This analysis guides the selection of incident modes that convert into transmitted modes and improve adhesive joint inspection with ultrasonic Guided Waves.
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Guided Wave Propagation and mode differentiation in hollow cylinders with viscoelastic coatings
Journal of the Acoustical Society of America, 2008Co-Authors: Jing Mu, Joseph L RoseAbstract:Guided Wave Propagation theories have been widely explored for about one century. Earlier theories on single-layer elastic hollow cylinders have been very beneficial for practical nondestructive testing on piping and tubing systems. Guided Wave flexural (nonaxisymmetric) modes in cylinders can be generated by a partial source loading or any nonaxisymmetric discontinuity. They are especially important for Guided Wave mode control and defect analysis. Previous investigations on Guided Wave Propagation in multilayered hollow cylindrical structures mostly concentrate on the axisymmetric Wave mode characteristics. In this paper, the problem of Guided Wave Propagation in free hollow cylinders with viscoelastic coatings is solved by a semianalytical finite element (SAFE) method. Guided Wave dispersion curves and attenuation characteristics for both axisymmetric and flexural modes are presented. Due to the fact that dispersion curve modes obtained from SAFE calculations are difficult to differentiate from each ot...
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Guided Wave Propagation and mode differentiation in hollow cylinders with viscoelastic coatings
Journal of the Acoustical Society of America, 2008Co-Authors: Joseph L RoseAbstract:Guided Wave Propagation theories have been widely explored for about one century. Earlier theories on single-layer elastic hollow cylinders have been very beneficial for practical nondestructive testing on piping and tubing systems. Guided Wave flexural (nonaxisymmetric) modes in cylinders can be generated by a partial source loading or any nonaxisymmetric discontinuity. They are especially important for Guided Wave mode control and defect analysis. Previous investigations on Guided Wave Propagation in multilayered hollow cylindrical structures mostly concentrate on the axisymmetric Wave mode characteristics. In this paper, the problem of Guided Wave Propagation in free hollow cylinders with viscoelastic coatings is solved by a semianalytical finite element (SAFE) method. Guided Wave dispersion curves and attenuation characteristics for both axisymmetric and flexural modes are presented. Due to the fact that dispersion curve modes obtained from SAFE calculations are difficult to differentiate from each other, a mode sorting method is established to distinguish modes by their orthogonality. Theoretical proof of the orthogonality between Guided Wave modes in a viscoelastic coated hollow cylinder is provided. Wave structures are also calculated and discussed in view of Wave mechanics in multilayered cylindrical structures containing viscoelastic materials.
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Guided Wave Propagation in curved plate like structures
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2008Co-Authors: Fei Yan, Joseph L RoseAbstract:Ultrasonic Guided Waves have been demonstrated as a promising tool in nondestructive evaluation (NDE) and structural health monitoring (SHM), especially for plates and plate‐like structures. However, many plate‐like structures subject to NDE and SHM are curved. The curvature plays an important role in Guided Wave Propagation. The objective of the work presented in this paper is to investigate the influence of curvature on Guided Wave Propagation. A semi‐analytical finite element (SAFE) technique is employed to analyze the dispersion curves for plate‐like structures with different curvatures. The changing of the Wave structures with curvature is investigated as well. Physical insight on the dispersion curve variations introduced by the plate curvature variation is obtained through Wave structure analysis.
Victor Giurgiutiu - One of the best experts on this subject based on the ideXlab platform.
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hybrid safe gmm approach for predictive modeling of Guided Wave Propagation in layered media
Engineering Structures, 2019Co-Authors: Roshan Joseph, Mohammad Faisal Haider, Victor GiurgiutiuAbstract:Abstract Dispersion curve, and displacement modeshapes of multilayer structures can be obtained using Semi-Analytical Finite Element (SAFE) method. Stress mode shapes calculated from SAFE were discontinuous at the interface, because SAFE method formulation does not apply stress continuity at the interface. A case study of 1 mm aluminum-1 mm steel double-layer plate is presented, showing the SAFE stress predictions at the interface. The results observed were discontinuity of out-of-plane stress modeshapes at the interface. Mesh refinement was performed at the interface to study the convergence of stress mode shapes at the interface, yet the stress discontinuity problem was not solved. A fine mesh at the interface was created by using variable mesh techniques. This also did not provide continuous stress mode shape at the interface. Therefore, in this paper, a novel hybrid SAFE-GMM (Global Matrix Method) approach was used to obtain stress mode shapes accurately and efficiently. GMM develops the displacement and stress equations for individual layers in a multilayered structure and assembles a global matrix by applying the boundary and interface continuity conditions. A case of practical importance, CFRP strengthened concrete structure was analyzed using the SAFE-GMM approach. The drawback of the SAFE technique to this case is also presented, and it shows that the hybrid SAFE-GMM approach gave the interface stresses accurately.
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using the gauge condition to simplify the elastodynamic analysis of Guided Wave Propagation
INCAS Bulletin, 2016Co-Authors: Bhuiyan Yeasin, Victor GiurgiutiuAbstract:In this article, gauge condition in elastodynamics is explored more to revive its potential capability of simplifying Wave Propagation problems in elastic medium. The inception of gauge condition in elastodynamics happens from the Navier-Lame equations upon application of Helmholtz theorem. In order to solve the elastic Wave problems by potential function approach, the gauge condition provides the necessary conditions for the potential functions. The gauge condition may be considered as the superposition of the separate gauge conditions of Lamb Waves and shear horizontal (SH) Guided Waves respectively, and thus, it may be resolved into corresponding gauges of Lamb Waves and SH Waves. The manipulation and proper choice of the gauge condition does not violate the classical solutions of elastic Waves in plates; rather, it simplifies the problems. The gauge condition allows to obtain the analytical solution of complicated problems in a simplified manner.
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low cost simulation of Guided Wave Propagation in notched plate like structures
Journal of Sound and Vibration, 2015Co-Authors: E V Glushkov, N V Glushkova, Artem Eremin, Victor GiurgiutiuAbstract:The paper deals with the development of low-cost tools for fast computer simulation of Guided Wave Propagation and diffraction in plate-like structures of variable thickness. It is focused on notched surface irregularities, which are the basic model for corrosion damages. Their detection and identification by means of active ultrasonic structural health monitoring technologies assumes the use of Guided Waves generated and sensed by piezoelectric wafer active sensors as well as the use of laser Doppler vibrometry for surface Wave scanning and visualization. To create a theoretical basis for these technologies, analytically based computer models of various complexity have been developed. The simplest models based on the Euler–Bernoulli beam and Kirchhoff plate equations have exhibited a sufficiently wide frequency range of reasonable coincidence with the results obtained within more complex integral equation based models. Being practically inexpensive, they allow one to carry out a fast parametric analysis revealing characteristic features of Wave patterns that can be then made more exact using more complex models. In particular, the effect of resonance Wave energy transmission through deep notches has been revealed within the plate model and then validated by the integral equation based calculations and experimental measurements.
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Guided Wave Propagation in composite laminates using piezoelectric wafer active sensors
Aeronautical Journal, 2013Co-Authors: Matthieu Gresil, Victor GiurgiutiuAbstract:Piezoelectric wafer active sensors (PWAS) are lightweight and inexpensive transducers that enable a large class of structural health monitoring (SHM) applications such as: (a) embedded Guided Wave ultrasonics, i.e., pitch-catch, pulse-echo, phased arrays; (b) high-frequency modal sensing, i.e., electro-mechanical impedance method; and (c) passive detection. The focus of this paper is on the challenges posed by using PWAS transducers in the composite laminate structures as different from the metallic structures on which this methodology was initially developed. After a brief introduction, the paper reviews the PWAS-based SHM principles. It follows with a discussion of Guided Wave Propagation in composites and PWAS tuning effects. Then, the mechanical effect is discussed on the integration of piezoelectric wafer inside the laminate using a compression after impact. Experiments were performed on a glass fiber laminate, employing PWAS to measure the attenuation coefficient. Finally, the paper presents some experimental and multi-physics finite element method (MP-FEM) results on Guided Wave Propagation in composite laminate specimens.
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time domain hybrid global local concept for Guided Wave Propagation with piezoelectric wafer active sensor
Journal of Intelligent Material Systems and Structures, 2013Co-Authors: Matthieu Gresil, Victor GiurgiutiuAbstract:This article presents a combined finite element method and analytical process to predict the one-dimensional Guided- Wave Propagation for nondestructive evaluation and structural health monitoring application. Analytical methods can per- form efficient modeling of Wave Propagation but are limited to simple geometries. In response to today's most complex cases not covered by the simulation tools available, we aim to develop an efficient and accessible tool for structural health monitoring application. This tool will be based on a hybrid coupling between analytical solution and time-domain numerical codes. Using the principle of reciprocity, global analytical calculation is coupled with local finite element method analysis to utilize the advantages of both methods and obtain a rapid and accurate simulation method. The phe- nomenon of interaction between the ultrasonic Wave, the defect, and the structure, leading to a complex signature, is efficiently simulated by this hybrid global-local approach and is able to predict the specific response signal actually received by sensor. The finite element mesh is used to describe the region around the defects/flaws. In contrast to other hybrid models already developed, the interaction between Lamb Waves and defects is computed in the time domain using the explicit solver of the commercial finite element method software ABAQUS.