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Title: Experimental study of wave propagation in heterogeneous materials
Authors: Dona, Marco
Lombardo, Mariateresa
Barone, Giorgio
Keywords: Wave propagation
Dispersion
Gradient-enriched continuum
Issue Date: 2015
Publisher: © Civil-Comp Limited
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.
Abstract: 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.
Description: This is a conference paper.
Sponsor: EPSRC (UK) is gratefully acknowledged for funding this research project under grant EP/M004163/1.
Version: Accepted for publication
DOI: 10.4203/ccp.108.208
URI: https://dspace.lboro.ac.uk/2134/19245
Publisher Link: http://dx.doi.org/10.4203/ccp.108.208
Appears in Collections:Conference Papers (Civil and Building Engineering)

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