Journal
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
Volume 27, Issue 11, Pages 869-875Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15376494.2018.1501523
Keywords
Nonlocal elasticity; nanobeams; size effects; buckling; CNT; NEMS
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Funding
- Italian Ministry of Education, University and Research (MIUR) [2015JW9NJT_013, COAN 5.50.16.01, 2015JW9NJT]
- research program ReLUIS 2017
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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.
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