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Dynamical properties of a composite microcracked bar based on a generalized continuum formulation

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Abstract

The dynamical behavior of a mono-dimensional bar with distributed microcracks is addressed in terms of free and forced wave propagation. The multiscale model, derived from a generalized continuum formulation, accounts for the microstructure by means of a microdisplacement variable, added to the standard macrodisplacement, and of internal parameters representing density and length of microcracks. The influence of coupling between micro- and macrodisplacement overall response on the system is discussed, as well as the effect of the damage parameters on the propagating waves.

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Acknowledgements

This research was supported by the Italian Ministry of University and Research, P.R.I.N. 2015, Project 2015JW9NJT Advanced mechanical modeling of new materials and structures for the solution of 2020 Horizon challenges, Sapienza Research Unit (Grant B86J16002300001), and by Sapienza University, Grant 2016 (B82F16005920005).

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Authors and Affiliations

  1. Dipartimento di Ingegneria Strutturale e Geotecnica, Università degli Studi di Roma La Sapienza, Rome, Italy

    Valeria Settimi, Patrizia Trovalusci & Giuseppe Rega

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  1. Valeria Settimi
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  2. Patrizia Trovalusci
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  3. Giuseppe Rega
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Correspondence to Patrizia Trovalusci.

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Communicated by Victor Eremeyev, Holm Altenbach.

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Settimi, V., Trovalusci, P. & Rega, G. Dynamical properties of a composite microcracked bar based on a generalized continuum formulation. Continuum Mech. Thermodyn. 31, 1627–1644 (2019). https://doi.org/10.1007/s00161-019-00761-7

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