Autori: Barretta Raffaele, Faghidian S. Ali, Luciano Raimonso, Medaglia Carlo Maria, Penna Rosa
Editore: Elsevier
Tipologia Prodotto: Contributo in rivista – Articolo scientifico (Article)
DOI: https://doi.org/10.1016/j.compositesb.2018.07.036
Titolo della Rivista: COMPOSITES. PART B, ENGINEERING
Numero; Volume: 154
Numero prima e ultima pagina: 20 – 32
Codice ISSN: 1359-8368
Anno di Pubblicazione: 2018
Link: https://www.sciencedirect.com/science/article/abs/pii/S1359836818305626?via%3Dihub
Abstract:
Size-dependent vibrational behavior of functionally graded (FG) Timoshenko nano-beams is investigated by strain gradient and stress-driven nonlocal integral theories of elasticity. Hellinger-Reissner’s variational principle is preliminarily exploited to establish the equations governing the elastodynamic problem of FG strain gradient Timoshenko nano-beams. Differential and boundary conditions of dynamical equilibrium of FG Timoshenko nano-beams, with nonlocal behavior described by the stress-driven integral theory, are formulated. Free vibrational responses of simple structures of technical interest, associated with nonlocal stress-driven and strain gradient strategies, are analytically evaluated and compared in detail. The stress-driven nonlocal model for FG Timoshenko nano-beams provides an effective tool for dynamical analyses of stubby composite parts of Nano-Electro-Mechanical Systems.
Keywords: Timoshenko nano-beam; Strain gradient elasticity; Hellinger-Reissner variational principle; Stress-driven nonlocal model; FG materials; Analytical modelling