Nondestructive Testing with Ultrasound: Numerical Modeling and Imaging

Marklein, R.; Langenberg, K. J.; Bärmann, R.; Mayer, Klaus; Klaholz, S.

doi:10.1007/978-1-4419-8772-3_123

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…The overlapping between such waves and the echoes in the specimen are received by the transducer. Since aggregate is arranged randomly, the phenomenon of scattering is stochastic and incoherent with the incident pulse [22,23]. Therefore, the effects of the scattering are analysed by means of an additive model, in which a Gaussian noise is overlapped to the waveforms at the receiving transducer.…”

Section: Significance Of the Current Researchmentioning

confidence: 99%

Nondestructive evaluation of defects in concrete structures based on finite element simulations of ultrasonic wave propagation

Acciani¹,

Fornarelli²,

Giaquinto³

et al. 2010

Nondestructive Testing and Evaluation

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Concrete structures require periodic inspections and quality control to assess their structural integrity. For this task, several methodologies based on the use of different technologies have been previously proposed. In particular, nondestructive evaluations, based on the use of ultrasonic wave propagation, have proved to be attractive due to the possibility to perform reliable assessments of concrete structures. In this paper, an approach exploiting ultrasonic propagation characteristics is proposed. This approach is developed by using data obtained from numerical simulations, whereas proper simulation settings to perform the diagnosis are obtained by preliminary studies. Subsequently, an automatic inspection method to determine the position of defects is developed. The aim of the method consists of determining the position of a defect by the computation of flight times related to signals reflected by anomalies in the structure. Such computation is based on a preliminary classification of defect positions that combines a genetic algorithm for a feature selection and a statistical approach for classification. The performances of the proposed method are evaluated in a specific study case, showing satisfactory numerical results, which show that this approach can be used to identify the position of defects.

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Section: Significance Of the Current Researchmentioning

confidence: 99%

Nondestructive evaluation of defects in concrete structures based on finite element simulations of ultrasonic wave propagation

Acciani¹,

Fornarelli²,

Giaquinto³

et al. 2010

Nondestructive Testing and Evaluation

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show abstract

“…One of these, the Elastodynamic Finite Integration Technique (EFIT) [6,7], has been applied to several real-life NDT situations. A subset of six 2D EFIT simulations include the NDT of a welded high pressure vessel, ultrasonic pipeline inspection, NDT of concrete (NDT-CE) (the reader is referred to [8]), NDT of fiber reinforced laminates, NDT of fiber reinforced T-stringer, and transducer modeling.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Modeling of Real-Life NDT Situations: Applications and Further Developments

Marklein

Langenberg

Klaholz

et al. 1996

Review of Progress in Quantitative Nondestructive Evaluation

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“…Finite methods are the most widely used numerical approaches for modeling fields in physical systems, but are often limited to 2D representations or the use of periodic cells for the simulation of particle dispersions. [1][2][3] These simplifications reduce the number of calculations, but may also exclude effects arising from a fully random and 3D particle configuration.…”

mentioning

confidence: 99%

Iterative simulation of elastic wave scattering in arbitrary dispersions of spherical particles

Doyle

2006

The Journal of the Acoustical Society of America

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A numerical modeling approach was developed to simulate the propagation of shear and longitudinal sound waves in arbitrary, dense dispersions of spherical particles. The scattering interactions were modeled with vector multipole functions and boundary condition solutions for each particle. Multiple scattering was simulated by translating the scattered wave fields from one particle to another with the use of translational addition theorems, summing the multiple-scattering contributions, and recalculating the scattering using an iterative method. The theory and initial results for the model are presented, including an integral derivation for the translational addition theorems. The model can simulate 3D material microstructures with a variety of particle size distributions, compositions, and volume fractions. To test the model, spectra and wave field patterns were generated from both ordered and disordered microstructures containing up to several hundred particles. The model predicts wave propagation phenomena such as refractive focusing, mode conversion, and band gap phenomena. The convergence of the iterations ranges from excellent to fair, and is dependent on the field (longitudinal or shear), particle configuration, and elastic wave frequency. The model is currently limited by the computation of sufficiently high multipole order for the simulation of dense particle dispersions.

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Nondestructive Testing with Ultrasound: Numerical Modeling and Imaging

Cited by 8 publications

References 9 publications

Nondestructive evaluation of defects in concrete structures based on finite element simulations of ultrasonic wave propagation

Nondestructive evaluation of defects in concrete structures based on finite element simulations of ultrasonic wave propagation

Ultrasonic Modeling of Real-Life NDT Situations: Applications and Further Developments

Iterative simulation of elastic wave scattering in arbitrary dispersions of spherical particles

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