Wave propagation in cross-linked random fiber networks

We numerically investigate the propagation of small-amplitude elastic waves in random fiber networks. Our analysis reveals that the dynamic response of the system is not only controlled by its overall elasticity, but also by the local microstructure. In fact, we find that the longest fiber-segment p...

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Bibliographic Details
Published in:Applied physics letters 2015-11, Vol.107 (21)
Main Authors: Babaee, Sahab, Shahsavari, A. S., Wang, Pai, Picu, R. C., Bertoldi, Katia
Format: Article
Language:English
Subjects:
Applied physics
Crosslinking
Dispersion curve analysis
Dynamic response
Elastic waves
Elasticity
Networks
Wave propagation
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Summary:We numerically investigate the propagation of small-amplitude elastic waves in random fiber networks. Our analysis reveals that the dynamic response of the system is not only controlled by its overall elasticity, but also by the local microstructure. In fact, we find that the longest fiber-segment plays a key role in dynamics when the network is excited with waves of short wavelength. In this case, the Bloch modes are highly non-affine as the longest segments oscillate close to their resonances. Based on this observation, we predict the low frequency dispersion curves of random fiber networks.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4936327