The dynamic behaviour of micro-and nano-beams is investigated by the nonlocal continuum mechanics, a computationally convenient approach with respect to atomistic strategies. Specifically, size effects are modelled by expressing elastic curvatures in terms of the integral mixture of stress-driven local and nonlocal phases, which leads to well-posed structural problems. Relevant nonlocal equations of the motion of slender beams are formulated and integrated by an analytical approach. The presented strategy is applied to simple case-problems of nanotechnological interest. Validation of the proposed nonlocal methodology is provided by comparing natural frequencies with the ones obtained by the classical strain gradient model of elasticity. The obtained outcomes can be useful for the design and optimisation of micro-and nano-electro-mechanical systems (M/NEMS).

Dynamics of stress-driven two-phase elastic beams / Vaccaro, M. S.; Pinnola, F. P.; Marotti de Sciarra, F.; Barretta, R.. - In: NANOMATERIALS. - ISSN 2079-4991. - 11:5(2021), p. 1138. [10.3390/nano11051138]

Dynamics of stress-driven two-phase elastic beams

Vaccaro M. S.;Pinnola F. P.;Marotti de Sciarra F.;Barretta R.
2021

Abstract

The dynamic behaviour of micro-and nano-beams is investigated by the nonlocal continuum mechanics, a computationally convenient approach with respect to atomistic strategies. Specifically, size effects are modelled by expressing elastic curvatures in terms of the integral mixture of stress-driven local and nonlocal phases, which leads to well-posed structural problems. Relevant nonlocal equations of the motion of slender beams are formulated and integrated by an analytical approach. The presented strategy is applied to simple case-problems of nanotechnological interest. Validation of the proposed nonlocal methodology is provided by comparing natural frequencies with the ones obtained by the classical strain gradient model of elasticity. The obtained outcomes can be useful for the design and optimisation of micro-and nano-electro-mechanical systems (M/NEMS).
2021
Dynamics of stress-driven two-phase elastic beams / Vaccaro, M. S.; Pinnola, F. P.; Marotti de Sciarra, F.; Barretta, R.. - In: NANOMATERIALS. - ISSN 2079-4991. - 11:5(2021), p. 1138. [10.3390/nano11051138]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/884566
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 9
social impact