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Experimental study of wave propagation in heterogeneous materials

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conference contribution
posted on 03.11.2015, 11:36 by Marco Dona, Mariateresa LombardoMariateresa Lombardo, Giorgio Barone
The phenomenon of wave propagation through concrete materials is affected by dispersion due to its intrinsic heterogeneous microstructure. Previous experiments have shown an increase of phase velocity at high frequencies. This behaviour cannot be analytically described by the classical elasticity theory, due to its non-dispersive nature. Instead, enhanced theories can be adopted. In this work the dynamically consistent non local model, able to take into account the microstructural effects by two additional length scale parameters, is retrieved. The main subject of this contribution is the experimental identification of the dispersive behaviour of cementitious materials and the validation of the gradient continuum to predict the dispersion of the wave born out of the heterogeneity of the material. The proposed work extends the applicability of non-local theories from a purely heoretical/analytical domain to the laboratory territory.

Funding

EPSRC (UK) is gratefully acknowledged for funding this research project under grant EP/M004163/1.

History

School

  • Architecture, Building and Civil Engineering

Published in

The Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing

Citation

DONA, M., LOMBARDO, M. and BARONE, G., 2015. Experimental study of wave propagation in heterogeneous materials. IN: Kruis, J., Tsompanakis, J. and Topping, B.H.V. (eds.) Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing, Prague, 1-4 Sept, Paper 208.

Publisher

© Civil-Comp Limited

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2015

Notes

This is a conference paper.

Language

en

Location

Prague