期刊
MECHANICS RESEARCH COMMUNICATIONS
卷 87, 期 -, 页码 35-41出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.mechrescom.2017.11.004
关键词
Integral elasticity; Nano-beams; Functionally graded materials; Torsion; Carbon nanotubes
类别
Functionally graded elastic annular nano-beams subjected to torsion are studied by a coordinate-free approach. Strain- and stress-driven integral elasticity models are formulated for investigation of structural behavior of beam-like components of nano-electro-mechanical systems (NEMS). The analysis reveals that the ERINGEN strain-driven fully nonlocal model cannot be used in Structural Mechanics. The stress-driven theory is instead mathematically and mechanically appropriate for nanotechnological applications. Exact solutions of elastic torsional rotations of nano-beams of technical interest are established by adopting the new stress-driven integral relation equipped with error and bi-exponential kernels. Effectiveness of the new nonlocal strategy is tested by comparing the contributed results, with the ones corresponding to the first-gradient elasticity theory and to the ERINGEN special differential law. (C) 2017 Elsevier Ltd. All rights reserved.
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