Bending of Euler–Bernoulli beams using Eringen’s integral formulation: A paradox resolved

By J. Fernández-Sáez, Ramón Zaera, Jose Antonio Loya, J. Reddy. 2016

463 citations recorded by the source corpus.

Abstract The Eringen nonlocal theory of elasticity formulated in differential form has been widely used to address problems in which size effect cannot be disregarded in micro- and nano-structured solids and nano-structures. However, this formulation shows some inconsistencies that are not completely understood. In this paper we formulate the problem of the static bending of Euler–Bernoulli beams using the Eringen integral constitutive equation. It is shown that, in general, the Eringen model in differential form is not equivalent to the Eringen model in integral form, and a general method to solve the problem rigorously in integral form is proposed. Beams with different boundary and load conditions are analyzed and the results are compared with those derived from the differential approach showing that they are different in general. With this integral formulation, the paradox that appears when solving the cantilever beam with the differential form of the Eringen model (increase in stiffness with the nonlocal parameter) is solved, which is one of the main contributions of the present work.

Subfields: Materials Chemistry, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/0ae23c4af28cd4b2befe7bce04f65da06ed741be

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In Materials Chemistry

In Mechanics of Materials

Citations in the corpus

Vibrations of Bernoulli-Euler beams using the two-phase nonlocal elasticity theory (2017, unknown): “Although several attempts have been made to overcome these paradoxical results (Chal-lamel and Wang, 2008; Fern´andez-S´aez et al., 2016), a clear picture of the problem has been pointed out by Romano et al. (2017) who shown that, in the majorities of the cases, the integral formulation of the…”
A review on the mechanics of nanostructures (2018, methodology): “[130] so as to describe the bending of nanobeams using the nonlocal integral”
Stress-driven modeling of nonlocal thermoelastic behavior of nanobeams (2019, background): “Elastic responses associated with EDM are technically unacceptable, as discussed in [9–11, 14, 17].”
Bending and buckling of nonlocal strain gradient elastic beams (2017, methodology): “[46] investigated the bending problems of Euler–Bernoulli beams using the Eringen integral constitutive equation.”