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Study of the Compression Behavior of Steel-Fiber Reinforced Concrete by Means of the Response Surface Methodology
Open AccessArticle

Analysis of Elastic Nonlinearity Using Continuous Waves: Validation and Applications

Department of Applied Science and Technology (DISAT), Politecnico di Torino, 10129 Torino, Italy
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Appl. Sci. 2019, 9(24), 5332; https://doi.org/10.3390/app9245332
Received: 8 October 2019 / Revised: 20 November 2019 / Accepted: 3 December 2019 / Published: 6 December 2019
(This article belongs to the Section Acoustics and Vibrations)
The nonlinear elastic response of consolidated granular or damaged materials is the result of the combination of nonlinear attenuation and velocity, coupled with hysteresis, which is linked to non equilibrium effects (often termed conditioning). Thus, a preliminary step towards the comprehension of the physical mechanisms responsible of the nonlinear elastic behaviours consists in quantifying and separating the various contributions. To this purpose, an approach based on a semi-analytical treatment of signals resulting from a monochromatic continuous wave excitation can be successfully implemented. Its validation is discussed here, applying the proposed approach to the analysis of numerical data obtained by using a finite difference spring model code. The accuracy, sensibility and robustness of the protocol are verified in different nonlinear conditions. View Full-Text
Keywords: nonlinearity; elasticity; attenuation; velocity; continuous waves nonlinearity; elasticity; attenuation; velocity; continuous waves
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Di Bella, A.; Gliozzi, A.S.; Scalerandi, M.; Tortello, M. Analysis of Elastic Nonlinearity Using Continuous Waves: Validation and Applications. Appl. Sci. 2019, 9, 5332.

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