Buckling loads of nano-beams in stress-driven nonlocal elasticity. Issue 11 (1st June 2020)

• Record Type: Journal Article
• Authors: Barretta, R.; Fabbrocino, F.; Luciano, R.; de Sciarra, F. Marotti; Ruta, G.
• Is Part Of: Mechanics of advanced materials and structures. Volume 27:Issue 11(2020)
• Page Start: 869
• Page End: 875
• Publication Date: 2020-06-01
• Subjects: Nonlocal elasticity -- nanobeams -- size effects -- buckling -- CNT -- NEMS; Composite materials -- Mechanical properties -- Periodicals; Composite construction -- Periodicals; 620.118
• DOI: 10.1080/15376494.2018.1501523
• Languages: English
• ISSNs: 1537-6494

Abstract

Abstract: Size-dependent buckling of compressed Bernoulli-Euler nano-beams is investigated by stress-driven nonlocal continuum mechanics. The nonlocal elastic strain is obtained by convoluting the stress field with a suitable smoothing kernel. Incremental equilibrium equations are established by a standard perturbation technique. Higher-order constitutive boundary conditions are naturally inferred by the stress-driven nonlocal integral convolution, equipped with the special bi-exponential kernel. Buckling loads of compressed nano-beams, with kinematic boundary constraints of applicative interest, are numerically calculated and compared with those obtained by the theory of strain gradient elasticity.