4.7 Article

On Representing Strain Gradient Elastic Solutions of Boundary Value Problems by Encompassing the Classical Elastic Solution

Journal

MATHEMATICS
Volume 10, Issue 7, Pages -

Publisher

MDPI
DOI: 10.3390/math10071152

Keywords

strain gradient elastic theory; general solution representation; Bernoulli-Euler beam; material with microstructure

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Funding

  1. Hellenic Foundation for Research and Innovation (HFRI) [2060]

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This study provides a general representation of the solution to the simplified elastostatics version of Mindlin's Form II first-strain gradient elastic theory. Through functional theory considerations, a solution representation of the one-intrinsic-parameter strain gradient elastostatic equation is rigorously provided for the first time. The study also addresses contradictions arising from two well-known first-strain gradient elastic models proposed in the literature to describe the strain gradient elastostatic bending behavior of Bernoulli-Euler beams.
The present work aims to primarily provide a general representation of the solution of the simplified elastostatics version of Mindlin's Form II first-strain gradient elastic theory, which converges to the solution of the corresponding classical elastic boundary value problem as the intrinsic gradient parameters become zero. Through functional theory considerations, a solution representation of the one-intrinsic-parameter strain gradient elastostatic equation that comprises the classical elastic solution of the corresponding boundary value problem is rigorously provided for the first time. Next, that solution representation is employed to give an answer to contradictions arising by two well-known first-strain gradient elastic models proposed in the literature to describe the strain gradient elastostatic bending behavior of Bernoulli-Euler beams.

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