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Chapitre d'ouvrage

Time Domain Analysis of Elastic Nonlinearity in Concrete Using Continuous Waves

Abstract : Concrete and consolidated granular media in general exhibit a strong nonlinear hysteretic elastic behavior when excited by ultrasonic wave perturbations. Due to the sensitivity of their elastic properties to the small changes that can appear in their microstructure, the dynamic stress-strain relationship considered at low strains is affected by the presence of microcracks and hence the progression of damage. Tracking the nonlinear behavior can be made through the dependence on the excitation amplitude of the amplitude of higher order harmonics or of the resonance frequency of the sample. The present chapter shows a time domain analysis of elastic nonlinearity based on the break of the superposition principle when ultrasonic continuous waves are propagating in concrete samples. The latter, which can be of different microstructures (grain sizes, mortar, or polymer matrix), helps to understand the physical mechanisms involved in the different nonlinear elastic responses.
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Chapitre d'ouvrage
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Contributeur : Mourad Bentahar Connectez-vous pour contacter le contributeur
Soumis le : jeudi 26 mars 2020 - 18:14:38
Dernière modification le : mardi 30 novembre 2021 - 14:32:03

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Mourad Bentahar, Charfeddine Mechri, Paola Antonaci, Antonio Gliozzi, Marco Scalerandi. Time Domain Analysis of Elastic Nonlinearity in Concrete Using Continuous Waves. Acoustics of Materials, IntechOpen, 2019, ⟨10.5772/intechopen.82621⟩. ⟨hal-02520661⟩



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