Nonlinear ultrasonic evaluation of load effects on discontinuities in concrete

Antonaci, Paola; Bruno, Caterina Letizia Elisabetta; Bocca, Pietro Giovanni; Scalerandi, Marco; Gliozzi, Antonio

doi:10.1016/j.cemconres.2009.09.014

Cited by 70 publications

(31 citation statements)

References 30 publications

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“…26 The considered sample was a prism obtained by joining together two identical concrete cubes (20 Â 20 Â 20 cm 3 ). The interface between the two cubes was a thin layer of a cement paste (about 4 mm thick).…”

Section: Resultsmentioning

confidence: 99%

Influence of noise on the threshold for detection of elastic nonlinearity

Bentahar

Guerjouma

Idijmarene

et al. 2013

Journal of Applied Physics

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Wheel/rail noise generation due to nonlinear effects and parametric excitationNonlinear effects on the propagation of elastic waves in hysteretic media are of great importance, with applications in imaging and monitoring evolution of damage/phase transitions/biological features. However, excitation amplitudes are an issue in order to improve performances of the techniques. Noise effects in the signals can be stronger than the generated nonlinear effects, thus rendering difficult the nonlinear analysis. Here, we analyze the link between the amplitude threshold for detection of nonlinear effects and different kinds of noises, which might be present in experiments. We also discuss the implications in the intrpretation of experiments. V C 2013 American Institute of Physics. [http://dx.

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Section: Resultsmentioning

confidence: 99%

Influence of noise on the threshold for detection of elastic nonlinearity

Bentahar

Guerjouma

Idijmarene

et al. 2013

Journal of Applied Physics

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“…It has been shown that the nonlinear elasticity parameters are very sensitive to the microstructural changes and the formation of microcracks (Antonaci et al 2013;Chen et al 2011;Dahlen et al 2015). The sensitivity of the nonlinear parameters to damaged caused by mechanical loading and deterioration mechanisms such as ASR and freeze-thaw has been discussed in many publications such as (Antonaci et al 2010;Eiras et al 2012), (Chen et al 2010;Lesnicki et al 2011;Chen et al 2011;Lesnicki et al 2013;Moradi-Marani et al 2014;Eiras et al 2013a, b). Several elegant nondestructive test methods that exploit the nonlinear elasticity parameters have been previously developed.…”

Section: Introductionmentioning

confidence: 99%

“…Several elegant nondestructive test methods that exploit the nonlinear elasticity parameters have been previously developed. Examples of these methods include (Antonaci et al 2013;Kim et al 2006b, a;Eiras et al (2014Eiras et al ( , 2013b; Johnson et al 1996;Antonaci et al 2010;Eiras et al 2012;Chen et al 2010;Lesnicki et al 2011;Chen et al 2011;Lesnicki et al 2013;Eiras et al 2013a;Van Den Abeele et al 2000b;Chen et al 2008;Kober and Prevorovsky 2012;Moradi-Marani et al 2014;Dahlen et al 2015). Nonlinear acoustic and ultrasonic methods are, generally, suitable techniques to quantify damage by measuring the change in the nonlinear parameters of damaged materials and comparing them to that of undamaged material.…”

Section: Introductionmentioning

confidence: 99%

The Consequences of Material Nonlinearity on the Axisymmetric Flexural Vibration Measurements for Estimating the Dynamic Elastic Modulus of Damaged Cement Based Materials

Rashetnia

Ghasemzadeh²,

Pour-Ghaz

2016

ACT

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Elastic modulus measurements are often required to evaluate the structural performance or to estimate the damage in cement-based materials. The axisymmetric flexural vibration (AFV) of a thick circular disk is a test method that can be used to estimate the dynamic elastic modulus of cement-based materials. Cement-based materials are inherently nonlinear materials and their nonlinearity increases with damage. The main objectives of this paper are to investigate the consequences of material nonlinearity on the AFV measurements, and to understand the implications of the change of material nonlinearity with damage on these measurements. In this work, experimental measurements are performed on mortar specimens damaged by freeze-thaw. Acoustic emission is used as a benchmark method to monitor and quantify the damage.

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“…At present, the research on the nonlinear ultrasonic technique is mainly focused on the following aspects: (1) Experimental study on dislocation slip damage for metal material (microscale) [3,4]. (2) Experimental and numerical simulation study on closed crack damage for metal or nonmetallic materials (mesoscale) [5][6][7]. (3) Exploration of the generation and propagation mechanism of nonlinear ultrasound [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Application of Wavelet and EEMD Joint Denoising in Nonlinear Ultrasonic Testing of Concrete

Nie

Wang

Zhao

2018

Advances in Materials Science and Engineering

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e health state of concrete is deteriorating during its service. Nonlinear ultrasonic detection based on the amplitude of the fundamental and the second harmonic is considered to be a powerful tool for the discovery of the microcrack in concrete. However, the research on processing the nonlinear ultrasonic signal is still insufficient. In order to highlight the real frequency domain components in the nonlinear ultrasonic signal, wavelet and ensemble empirical mode decomposition (EEMD) were joined to denoise the numerical and measured signal. e optimal wavelet base and the decomposition level were determined by the signal-to-noise ratios (SNRs). en, the wavelet threshold denoising signal was decomposed by EEMD, omitting the highfrequency components and ultimately achieving the desired denoising effect. e denoising result of the test signals demonstrates that this method is effective in denoising the details of the ultrasonic signal and improving the reliability and adaptability of the nonlinear ultrasonic testing. In this experiment, the concrete with the microcrack was tested by linear and nonlinear ultrasonic methods. Based on the variation regularity of the nonlinear ultrasonic coefficient β and velocity v, we can conclude that the nonlinear ultrasonic parameter β is more sensitive to the microcrack in concrete than the traditional wave velocity v. e nonlinear ultrasonic testing can be an important supplement to the current nondestructive testing technique of the concrete.

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Nonlinear ultrasonic evaluation of load effects on discontinuities in concrete

Cited by 70 publications

References 30 publications

Influence of noise on the threshold for detection of elastic nonlinearity

Influence of noise on the threshold for detection of elastic nonlinearity

The Consequences of Material Nonlinearity on the Axisymmetric Flexural Vibration Measurements for Estimating the Dynamic Elastic Modulus of Damaged Cement Based Materials

Application of Wavelet and EEMD Joint Denoising in Nonlinear Ultrasonic Testing of Concrete

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