Nonlocal theories of Continuum Mechanics are widely used in order to assess size effects in nano-structures. In this paper, free vibrations of nano-beams are investigated by making recourse to the novel stress-driven nonlocal integral model (SDM). Equations of motion governing the dynamics of a Bernoulli-Euler nano-beam are consistently formulated and numerically integrated by Matlab. Selected case studies involving structures of nanotechnological interest are examined. Natural frequencies, evaluated according to the SDM, are compared with those obtained by the Eringen differential law (EDM) and by the gradient elasticity theory (GradEla). SDM provides an effective methodology to describe nonlocal phenomena in NEMS.
Free vibrations of Bernoulli-Euler nano-beams by the stress-driven nonlocal integral model / Apuzzo, Andrea; Barretta, Raffaele; Luciano, Raimondo; MAROTTI DE SCIARRA, Francesco; Penna, Rosa. - In: COMPOSITES. PART B, ENGINEERING. - ISSN 1359-8368. - 123:(2017), pp. 105-111. [10.1016/j.compositesb.2017.03.057]
Free vibrations of Bernoulli-Euler nano-beams by the stress-driven nonlocal integral model
BARRETTA, RAFFAELE;MAROTTI DE SCIARRA, FRANCESCO;
2017
Abstract
Nonlocal theories of Continuum Mechanics are widely used in order to assess size effects in nano-structures. In this paper, free vibrations of nano-beams are investigated by making recourse to the novel stress-driven nonlocal integral model (SDM). Equations of motion governing the dynamics of a Bernoulli-Euler nano-beam are consistently formulated and numerically integrated by Matlab. Selected case studies involving structures of nanotechnological interest are examined. Natural frequencies, evaluated according to the SDM, are compared with those obtained by the Eringen differential law (EDM) and by the gradient elasticity theory (GradEla). SDM provides an effective methodology to describe nonlocal phenomena in NEMS.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
