Simulations of ultrasonic wave propagation in concrete based on a two-dimensional numerical model validated analytically and experimentally

Yu, Ting; Chaix, Jean François; Audibert, Lorenzo; Komatitsch, Dimitri; Garnier, Vincent; Hénault, Jean-Marie

doi:10.1016/j.ultras.2018.07.018

Cited by 36 publications

(18 citation statements)

References 30 publications

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“…Finite element models [143] are likely to be the best solution to both model the bulk macrostructure of such components and their surface roughness-such models have been recently used to model scattering in virtual simulated microstructures of polycrystalline materials either with equiaxed grains [144][145][146] or transverse isotropic as in austenitic welds [147]. The increasing power brought by the spectral finite elements (SEM) method is noticeable [148][149][150] in terms of calculation time and could be very useful for roughness with complex shape irregularities; SEM has recently been used for modeling ultrasonic propagation in granular materials, such as concrete [151].…”

Section: Summary Discussion and Perspectivesmentioning

confidence: 99%

Acoustic Scattering Models from Rough Surfaces: A Brief Review and Recent Advances

Darmon

Dorval

Baqué³

2020

Applied Sciences

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This paper proposes a brief review of acoustic wave scattering models from rough surfaces. This review is intended to provide an up-to-date survey of the analytical approximate or semi-analytical methods that are encountered in acoustic scattering from random rough surfaces. Thus, this review focuses only on the scattering of acoustic waves and does not deal with the transmission through a rough interface of waves within a solid material. The main used approximations are classified here into two types: the two historical approximations (Kirchhoff approximation and the perturbation theory) and some sound propagation models more suitable for grazing observation angles on rough surfaces, such as the small slope approximation, the integral equation method and the parabolic equation. The use of the existing approximations in the scientific literature and their validity are highlighted. Rough surfaces with Gaussian height distribution are usually considered in the models hypotheses. Rather few comparisons between models and measurements have been found in the literature. Some new criteria have been recently determined for the validity of the Kirchhoff approximation, which is one of the most used models, owing to its implementation simplicity.

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Section: Summary Discussion and Perspectivesmentioning

confidence: 99%

Acoustic Scattering Models from Rough Surfaces: A Brief Review and Recent Advances

Darmon

Dorval

Baqué³

2020

Applied Sciences

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“…A plane wave is transmitted through the inhomogeneous medium, which is surrounded by absorbing PMLs. Velocities and attenuation are obtained using a method similar to the one described by Yu et al [15]. It relies on a grid of observations points, visible in green on the left of Figure 4.…”

Section: Computations Of Ultrasonic Velocities and Attenuationsmentioning

confidence: 99%

FEM-based simulation tools for ultrasonic concrete inspection

Dorval¹,

Impériale²,

Darmon³

et al. 2022

eJNDT

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The simulation of nondestructive evaluation is a useful tool in the design of inspection procedure or the interpretation of results. In the case of the ultrasonic inspection of concrete, modeling the complex interaction of ultrasonic waves with the heterogeneous material is challenging. A finite element code for the simulation of ultrasonic inspections is developed in the CIVA software platform. It is the kernel of a new simulation module dedicated to concrete in a custom version of CIVA. This module relies on automated meshing managed through a user-friendly interface and offers comparatively fast numerical computations. Its aims at modeling practical concrete inspection configurations, involving for example distributions of aggregates, voids and metallic objects. In this communication, we present these modelling efforts and focus on configurations of interests and evaluation of the modelling performances performed in a recent collaboration between CEA and EDF.

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“…ere are gaps in the bond defects, and the wave impedance between cement mortar and the air was large [40], causing guided wave propagation in the rock bolt and multiple reflections in debonding and defects. e propagation velocity of the guided wave in rock bolts was greater than that in cement mortar and concrete, and part of the guided wave scatters more in all directions in cement mortar and concrete, resulting in serious attenuation.…”

Section: Influence Of Pullout Load On Guided Wavementioning

confidence: 99%

Study on Bond Defect Detection in Grouted Rock Bolt Systems under Pullout Loads

Niu

Chen

et al. 2022

Advances in Materials Science and Engineering

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In grouted rock bolt systems, bond defects often occur, which seriously affects the safety of rock mass structures. Therefore, in this study, based on the existence of bond defects, laboratory tests were conducted to detect the location and length of bond defects and study the guided wave propagation in grouted rock bolt systems under different pullout loads. The guided wave signal was analysed in the time domain and frequency domain. In addition to the laboratory test, a numerical simulation of the effect of different bond defect locations on ultrasonic guided wave propagation in rock bolts was conducted using a damage-based model. The influence mechanism of bond defects on guided wave propagation under different pullout loads was explored. The study confirmed that there existed a stress platform in the rock bolt at the bond defect under a pullout load. The location and length of the bond defect could be detected by the stress platform and guided wave. The debonding length increased exponentially with the amplitude ratio (Q) of low frequency to high frequency, and the Q value could be used as the quantitative index of debonding length. As the pullout load increased, the impedance mismatch between the rock bolt and cement mortar (defect) increased, and the guided wave propagation in grouted rock bolt systems was irregular. The pullout load weakened the guided wave propagation law. The larger the pullout load is, the greater the weakening effect is.

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Simulations of ultrasonic wave propagation in concrete based on a two-dimensional numerical model validated analytically and experimentally

Cited by 36 publications

References 30 publications

Acoustic Scattering Models from Rough Surfaces: A Brief Review and Recent Advances

Acoustic Scattering Models from Rough Surfaces: A Brief Review and Recent Advances

FEM-based simulation tools for ultrasonic concrete inspection

Study on Bond Defect Detection in Grouted Rock Bolt Systems under Pullout Loads

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